Mixed resistance generating system for fitness equipment

Abstract

The present invention relates to a hybrid resistance generation system for fitness equipment, which combines a conventional weight stack with an electromechanical resistance module. The system includes a housing, preferably provided with separate chambers for each component, to ensure that mutual interference is minimized. The physical resistance source and the electromechanical resistance source are connected in series, providing dynamic resistance adjustment during exercise. A sensor system tracks the applied resistance and the movement of the weight stack, providing real-time feedback. The system is applicable to various fitness equipment and provides enhanced user interaction through integrated data processing, so that resistance modes can be seamlessly joined and customized training plans can be provided.

Description

Technical Field

[0001] This application relates to a hybrid resistance generation system for fitness equipment. The hybrid resistance generation system includes a housing, a sensor system, a weight stack having multiple weight blocks (the weight stack being coupled to a weight sword to provide a first resistance source), and a mechanical resistance module providing a second resistance source. The first and second resistance sources are connected in series such that the resulting resistance source is applied to a first cable, which is preferably coupled to the weight sword. Background Technology

[0002] In general, fitness equipment refers to mechanical devices designed to support and optimize physical exercise. These machines are commonly used in gyms and rehabilitation centers, and can also be used in private homes to train various muscle groups, improve physical fitness, and achieve specific health goals. There are different types of fitness equipment, such as aerobic equipment to enhance cardiovascular health, strength equipment to increase muscle strength and mass, and flexibility and stretching equipment to improve body flexibility and agility. Multifunctional equipment combines various functions to provide a comprehensive training experience.

[0003] Fitness strength machines with weight stacks, also known as adjustable weight machines, are a common type of fitness equipment. These machines are characterized by weight stacks ranging from 45kg to 200kg, typically in increments of 5kg or 10 pounds. The weight blocks, often referred to as "iron weights," are connected to a cable and pulley system that provides the necessary resistance for a variety of cable-based exercises. These machines are the industry standard in both commercial and home gym environments.

[0004] Fitness equipment can be configured as, for example, a strength training machine, a cable chest press machine, a functional trainer, a Smith machine, or a strength Smith machine.

[0005] Examples of exercises that can be performed on adjustable machines include lat pulldowns, chest expansions, seated rows, shoulder presses, and leg curls. Users can adjust the resistance by moving pins between different weight blocks and coupling selected weight blocks to a weight sword, allowing for customization of workout intensity.

[0006] However, this adjustment process can be inconvenient because each adjustment requires the user to interrupt their workout and leave the training position to change the weight by moving the pin. Furthermore, traditional equipment lacks sensors specifically designed to analyze and record the movement of the combined weight block by the first and second resistance sources.

[0007] There are already solutions on the market for fitness equipment that use electric motors, flywheels, or magnetic braking systems to provide resistance instead of physical iron weights. These solutions rely on a (non-iron weight) resistance source to provide variable resistance to the user.

[0008] However, a drawback of these electromechanical resistance systems is that by completely eliminating the iron weights, they lose the tactile feedback experienced by users when using traditional physical weights. When moving physical weights, users feel the inertia, mass, and gravity of the weights, which enhances neuromuscular coordination as they control the weight throughout the exercise. Furthermore, the visual movement of physical weights produces psychological and motivational effects. Experience shows that moving real weights has a more positive impact on athletes' exercise motivation.

[0009] Existing technology

[0010] US20200254309 A1 and US 7163488 B2 each relate to a fitness device including a barbell connected to two cables. The two cables are attached to a mechanical resistance system capable of adjusting the resistance system to assist or prevent the barbell from being lifted. Accordingly, these fitness devices include a hybrid resistance generation system.

[0011] Although the two devices disclosed in the literature combine physical weights with mechanical resistance systems, they are specifically designed for barbells with free weight. Therefore, the applications of exercises that can be performed using this combination of resistance are limited.

[0012] The purpose of this invention

[0013] Therefore, the purpose of this invention is to eliminate the shortcomings of the prior art and to provide a hybrid resistance generation system for fitness equipment that can provide a variety of exercises, not limited to barbell-based training, can make simple weight adjustments for different training programs, and provides realistic tactile feedback. Summary of the Invention

[0014] The objective of this invention is achieved by the features of the independent claims. Advantageous embodiments of the invention are described in the dependent claims.

[0015] In a first aspect, this application relates to a hybrid resistance generating system for fitness equipment, the system comprising a housing (preferably having at least two chambers), a sensor system, a weight stack having multiple weight blocks (the weight stack being coupled to a weight sword to provide a first resistance source), and a mechanical resistance module providing a second resistance source. The first and second resistance sources are connected in series such that the resulting resistance source is applied to a first cable, which is preferably coupled to the weight sword.

[0016] Integrating a weight stack with multiple weight blocks and a mechanical resistance module into a single resistance-generating system for fitness equipment provides a diverse workout experience, allowing users to benefit from the tactile feedback of traditional weight blocks as well as the dynamic, software-adjustable, and precise control of electronic resistance. Physical weight blocks, especially weight stacks, provide high tactile feedback, allowing users to feel inertia, mass, and visually see the movement of the weight blocks, which can improve neuromuscular coordination and exercise motivation. In contrast, all-electronic systems would lack this advantage. This invention retains the tactile and visual feedback of physical weight blocks while combining the advantages of electronic or mechanical resistance.

[0017] The preferred resistance generation system for fitness equipment enables a non-linear force distribution throughout a workout without adjusting the weight stack. While users can interact with traditional iron weights, the mechanical resistance module can dynamically add, increase, or decrease resistance throughout a workout or even in a single repetition. This achieves a dynamic muscle tension curve, widely considered by scientists to be the optimal choice for developing muscle strength.

[0018] Furthermore, the preferred hybrid resistance generation system for fitness equipment can be used for any traditional exercise typically performed with conventional weights. This includes, but is not limited to, bench press, squat, and deadlift (three major strength-building exercises), as well as incline barbell bench press, shoulder press, bent-over rows, and lat pulldowns. The preferred hybrid resistance generation system is also suitable for fitness equipment adapted to various forms and shapes of strength equipment. The main difference between these machines lies in the location of the hybrid resistance generation system within the fitness equipment and the cable routing. However, the fundamental principle of simultaneously combining physical weights and mechanical resistance modules into the hybrid system remains consistent across different machines.

[0019] Typically, the weight stack is preferably a series of rectangular weight plates, usually made of metal, stacked together, and selectable by inserting pins into desired weight levels (the corresponding number of plates). The user can adjust the number of weight blocks by moving pins to different weight plates and coupling the selected weight plates to the weight sword. Each weight block has a through-hole through which a pin can be guided to engage with the weight sword. The selected weight plate (or weight block) is preferably guided vertically by a pair of vertical rods and a weight sword connected to a cable and positioned between the vertical rods.

[0020] Furthermore, the weight sword may include a shaft with axially spaced openings and a plate with through-holes that guide the vertical bar of the fitness equipment. The weight sword's design (characterized by the shaft with axially spaced openings) allows for easy adjustment of weight selection. The axially spaced openings are designed to receive pins that couple selected weight blocks from the weight stack to the weight sword. The plate of the weight sword with through-holes for guiding the vertical bar tube ensures smooth operation because the weight sword is always properly aligned and can effectively engage with the weight stack, resulting in a stable and safe lifting motion.

[0021] Furthermore, in this application, "cable" refers to a strong, flexible line or rope used to transmit force and provide resistance during exercise. These cables are typically made of durable materials such as steel or high-strength synthetic fibers. They are designed to withstand considerable tension when connecting various components of fitness equipment or hybrid resistance-generating systems, thereby allowing for smooth and controlled movement.

[0022] Because a hybrid resistance generating system includes both physical and electromechanical resistance sources, it refers to a hybrid system. Furthermore, since a hybrid resistance generating system can include a housing with at least two chambers, it can alternatively be described as a chamber system. In particular, this chamber system is characterized by its ability to connect resistance sources (physical and electromechanical) in series and to place the individual components in separate chambers.

[0023] Because the resistance sources are connected in series, a (total) resultant resistance source is generated, which is achieved by the sum of two resistances. Each of these resistances can be adjusted individually.

[0024] By placing the individual components of the hybrid resistance generation system in separate chambers, the system allows for physical separation of the components. Depending on the component, this prevents electromagnetic interference, thermal interference, or interactions between these components, thereby improving the overall performance of the system. Containing each component in a separate chamber also allows for targeted maintenance or replacement of individual components without interfering with other components, thus improving availability, or, for safety reasons, mechanically restricting user access to the chamber containing the electric motor. The chamber design can be customized to the specific needs of each component, such as optimized airflow for cooling the resistance module, ensuring that each component operates under its ideal environmental conditions.

[0025] The housing of the hybrid resistance generation system may include at least two chambers. As mentioned above, these chambers can be individually customized for each component of the hybrid resistance generation system. For example, the individual chambers may have different sizes and shapes. However, the housing does not necessarily consist only of chambers; it may also include solid sections, for example, to ensure that the housing has sufficient weight and remains stable. The housing is preferably made of metal (e.g., steel, stainless steel, or aluminum, fiber-reinforced plastic, or plastic).

[0026] Furthermore, the housing may have openings, for example, to allow the components enclosed by the housing to be seen. For instance, a weight stack may be visible through an opening, allowing the user to observe the movement of the individual weight blocks. Some openings may also be closable via doors, allowing components to be replaced, maintained, or repaired without having to remove the entire housing.

[0027] Preferably, the chambers are designed to be separated from other chambers by partitions or walls that can be integrated into the structure of the housing or added as separate components. Such partitions ensure that each chamber forms a completely enclosed space, protecting the internal components from external influences. Depending on the specific needs of the encapsulated components, the temperature, pressure, or protective measures of these chambers may differ from one another.

[0028] Furthermore, the shape of the chamber can be varied according to the specific requirements of the component, and it can be equipped with seals to prevent the intrusion of foreign substances.

[0029] In a preferred embodiment, a second cable connects the mechanical resistance module and the weight sword to each other. This configuration connects the mechanical resistance module, which serves as the second resistance source, and the weight stack, which serves as the first resistance source, in series.

[0030] In this configuration, the weight stack, specifically the weight sword, is coupled to the first cable, and when the first cable is pulled, it generates resistance through the gravity of the weight stack. Resistance can be increased by adding more weight blocks to the weight sword. When tension is applied to the first cable, it exerts a pulling force on the second cable connected to the weight sword. The second cable, in turn, resists the force applied by the electromechanical module. Therefore, the user pulling the first cable will also pull the second cable connected to the electromechanical module via the weight stack, effectively interacting with two resistance sources in series.

[0031] By continuously attaching the second cable to the weightsword, the electromechanical resistance module remains in an "always-on" mode. This means that the electromechanical resistance module is preferably always powered and continuously activated to pull back the second cable after it has been stretched, even when the electromechanical resistance module does not apply any resistance during exercise. The hybrid resistance generation system is preferably specially designed so that both cables can always be pulled in series by the user. If the user selects the mode of pulling only the physical weight blocks, i.e., only pulling the weight stack, then the electromechanical module provides almost zero resistance, just enough to pull back the second cable.

[0032] In this respect, users do not need to manually switch between resistance sources. Users can begin their workout with physical weight blocks (i.e., weight stacks) and switch to mixed resistance workouts using simple voice commands or by pressing control elements (preferably by pressing with just one finger, such as pressing a button on the user interface or rotating an adjustment ring). The mechanical resistance module is preferably always connected to the power grid for on-demand power and can be connected to the user's smartphone via Bluetooth or Wi-Fi.

[0033] To ensure continuous operation, a power source is configured to supply voltage to the mechanical resistance module. This can be achieved in various ways. The proposed hybrid resistance generation system or mechanical resistance module may include batteries and / or solar panels, or may have connections that allow it to be plugged into the power grid.

[0034] The inclusion of a second cable as a connection between the weight stack (as the first resistance source) and the mechanical resistance module (as the second resistance source) creates a stable connection, allowing for direct and immediate force transmission. The system is also flexible, allowing the weight stack and the mechanical resistance module to be positioned relative to each other as needed, with pulleys used to guide the aforementioned cable within the housing.

[0035] Preferably, the hybrid resistance generation system includes at least one pulley that guides the second cable to the weight sword of the weight stack. This design results in smooth coupling between the weight sword and the mechanical resistance module. Furthermore, the pulley helps manage the load on the second cable, which contributes to increased system durability and a longer lifespan. Preferably, the pulley is attached to the housing or the frame of the housing.

[0036] A pulley is preferably a wheel mounted on an axle or shaft, designed to assist in the movement and direction change of a cable, rope, or belt. It preferably has grooves or channels for securely holding the cable in place. Typically, it includes bearings to ensure smooth operation and is constructed from durable materials such as metal or high-strength plastics. Pulleys are usually mounted on sturdy brackets attached to a system or apparatus. Some pulleys have adjustment mechanisms to change height or angle and include safety features such as protection against cable slippage and handrails to protect the user. The wheel and grooves have smooth surfaces to minimize wear on the cable, and the entire assembly is preferably rated for a specific load capacity to ensure safe and efficient operation.

[0037] In another preferred embodiment, the weight stack is located in the first chamber, and the mechanical resistance module is located in the second chamber. Positioning the weight stack and the mechanical resistance module in separate chambers reduces interference between the two components. For example, the chamber housing the weight stack can be designed to effectively absorb vibrations, thereby preventing any impact on the mechanical resistance module and its sensitive electronic components.

[0038] Furthermore, the chamber layout can be customized to meet the specific requirements of the weight block or the mechanical resistance module, resulting in overall structural advantages. For example, the chamber containing the mechanical resistance module can be cooled independently. This means that only a relatively small chamber needs to be cooled, rather than the entire housing, thus reducing the cooling power and energy required by the system.

[0039] Clearly, the weighted sword can also be housed in the same chamber as the weight stack and can be considered part of the weight stack. The weight stack and part of the weighted sword can remain in their initial positions within the chamber. However, when the weighted sword is pulled, it can leave the chamber along with the weight block of the weight stack attached to the weighted sword.

[0040] Preferably, a mechanical resistance module refers to a device that provides adjustable resistance using electrical and mechanical components during exercise. This module enables precise electronic control of the resistance level, providing a dynamic and customizable exercise experience. Examples include electric systems or flywheels that use electromagnetic braking to adjust resistance.

[0041] The mechanical resistance module can include an electric motor with a winch, from which a second cable can be wound or unwound. The integration of an electric motor with a winch for winding and unwinding the second cable enhances the accuracy and reliability of resistance adjustment, allowing for smooth transitions and consistent resistance levels during operation. The use of an electric motor provides the advantage of automatic control over the resistance level, which can be programmed to suit various exercise patterns, thus providing a customized workout experience for the user. The winch mechanism allows for compact storage of the second cable when not in use. The electric motor can preferably be a servo motor, DC motor, and / or brushless DC motor to ensure high precision and control over cable movement, allowing for precise adjustment and consistent tension throughout the workout.

[0042] A brushless external rotor motor is particularly preferred for use in mechanical resistance modules. This motor offers the advantage of operating without a gearbox, simplifying the design of the mechanical resistance module and making it exceptionally efficient. In this configuration, the electric motor can be directly connected to the winch.

[0043] Alternatively, other embodiments are also possible, in which a gearbox can be inserted between the electric motor and the winch, which provides additional mechanical advantages and control over the cable movement.

[0044] Furthermore, the electromechanical force module may include, for example, electric servo motors (each with a power range between 500W and 1000W), as well as servo drivers, control boards, grounding connection cables, and Bluetooth communication chips. Other configurations are also possible, in which electric servo motors with power ranges from 50W to 4000W or from 250W to 1200W are used. The servo motors are not limited to these ranges.

[0045] In another preferred embodiment, the weight stack is located in the first chamber, the electric motor in the second chamber, and the winch in the third chamber. This allows for easier maintenance and repair, as each component can be accessed individually without interfering with other components.

[0046] The second and / or third chambers can be located below the first chamber. In this way, the weight sword can be positioned above the winch, allowing the second cable to be routed from below to the lower end of the weight sword, thus facilitating a simple and direct coupling between the winch and the weight sword. It will be apparent to those skilled in the art that an opening can be provided in the bottom surface or base plate of the first chamber, through which the second cable and / or weight sword can pass to reach the third chamber below.

[0047] Furthermore, the mechanical resistance module may include a control unit with a data processing unit for controlling the second resistance source and a communication unit for data communication. The control unit, including the data processing unit, combined with sensors for measuring the moving conventional iron weight and the provided mechanical resistance, enables the hybrid resistance generation system to provide dynamic resistance adjustment based on real-time feedback. This allows for adaptive resistance adjustment based on user performance, thereby enhancing the effectiveness of the workout. The communication unit allows for data exchange with external devices or networks, providing opportunities for remote monitoring, software updates, and integration with health tracking systems. The control unit's ability to manage the second resistance source, and especially the mechanical resistance module, ensures a seamless and user-friendly experience because it can automatically calibrate the resistance level in response to the programmed workout program or user preferences.

[0048] In another preferred embodiment, the hybrid resistance generation system may include a sensor system configured to acquire the resistance of a first resistance source and / or a second resistance source and / or a resulting resistance source, and / or acquire the motion of a weight stack and / or a weight sword, and / or acquire the motion of a first cable.

[0049] Preferably, the sensor system includes at least one sensor, a battery, and a communication unit. Furthermore, the sensor system may include a data processing unit, a memory, and / or a housing that encloses all its components.

[0050] The sensor system provides real-time feedback and enhanced accuracy, ensuring consistent resistance for effective workouts. It supports personalized workout plans tailored to individual needs and goals, while monitoring force and movement to prevent injury and improve safety. Users can track their progress and performance, and the control unit of the mechanical resistance module automatically adjusts to optimize the workout experience. This system increases engagement and motivation through real-time data, making workouts more effective, and integrates seamlessly with fitness apps for comprehensive tracking and goal setting.

[0051] For example, signals or acquired data from sensor systems can be combined, analyzed, stored in the cloud, and displayed to the user via software applications running on external devices such as smartphones or tablets. The software application can also be configured to control the main settings of the resistance module, including setting the resistance, switching between kg / lbs settings, and providing users with predefined workout programs.

[0052] Preferably, the user interface of the electromechanical resistance module and / or sensor system and / or fitness equipment can communicate with an external device having a data processing unit and a communication unit. The sensor system may include components for providing acquired data to the external device. The user interface may include components for providing input signals to the external device.

[0053] In another preferred embodiment, the sensor system may include a laser device. The laser device may be located below the bottom weight block of the weight stack or above the plate of the weight sword, and pointed towards the pin of the weight stack. Preferably, the laser device is configured to emit a laser beam towards the pin and calculate the distance traveled on the weight stack and the number of repetitions completed by analyzing the reflection of the laser beam. This information is important for the functionality of the mixed weight system because it helps to automatically and dynamically adjust the resistance of the electric motor based on the number of physical weight blocks selected by the user and the user's performance in a particular exercise.

[0054] Preferably, the laser device is a distance, range, or proximity measuring device. When the laser device is pointed at the pin, it specifically measures the distance between the laser emission point on the laser device and the pin of the weight stack. The pin preferably has a highly reflective surface to ensure that the reflection returns to the laser device without interference. The laser device is preferably equipped with a sensor (such as a photodiode) to effectively analyze the reflected beam.

[0055] The laser device can be aligned such that it is located at a certain distance below or above the center of the pin. The pin preferably comprises an axle and a pin head. The laser beam is specifically directed at the pin head, while the pin axle is inserted into the weight stack and couples the individual weight plates or weight blocks to the weight sword. The laser beam preferably radiates from below or above in a substantially vertical direction or is directed at the pin head. Each plate of the weight stack is at a predetermined distance from the laser device, allowing the laser device to detect which weight plate is coupled to the weight sword and how much weight the user is lifting. Furthermore, the laser device can detect the progress and completion of repetitive movements by monitoring continuous changes in distance.

[0056] It will be apparent to those skilled in the art that the laser device may have its own control unit, equipped with a data processing unit, a memory and / or a communication unit, which can communicate with the control unit of the electromechanical force module or external devices.

[0057] In an optional embodiment, the sensor system includes a weighing sensor, a triaxial accelerometer, a battery, a communication unit, and / or a data processing unit, wherein the weighing sensor interconnects a first cable coupled to the user interface of the fitness equipment with a weight sword of the weight stack. Specifically, the weighing sensor may be attached to the end of the first cable and directly fixed to the weight sword.

[0058] In this respect, the load cell measures weight by measuring the deformation or strain of the material when a load is applied, thus converting force into an electrical signal. It is preferably attached to the top of the weight. A triaxial accelerometer can be attached to the back of the load cell to measure the acceleration and distance of the weight as it moves along three mutually perpendicular axes (X, Y, and Z). Such triaxial accelerometers are commonly used, for example, in smartphones to detect motion and orientation. A rechargeable battery can also be located on the back of the load cell and power the sensor system.

[0059] Furthermore, external devices can be configured to process data provided by the sensor system and / or input data provided by the user interface and / or be configured to send control commands to the mechanoresistance module. The integration of the mechanoresistance module and the sensor system communicating with the external device enhances the interactivity and personalization of the training experience, as it allows for real-time tracking and adjustment of training parameters based on user performance. The ability of external devices to process sensor data and user input, as well as to send control commands to the mechanoresistance module, enables the implementation of advanced training programs and routines that can dynamically adapt to user needs and progress.

[0060] External devices can be smartphones, tablets, smartwatches, computers, or any other device with data processing and communication capabilities (not limited to these options).

[0061] The system is designed to integrate seamlessly with existing technology ecosystems, such as smartphones or computers, allowing users to leverage their devices for more features, such as workout tracking, social sharing, or access to a wider range of digital health services.

[0062] In another preferred embodiment, the hybrid resistance generating system may include at least one display capable of displaying data processed by the control unit of the mechanical resistance module and / or the control unit of the sensor system. The display may be designed as an LCD and located on a side wall or front of the housing of the hybrid resistance generating system, making it visible to the user during exercise. The display is capable of displaying data processed by the control unit of the sensor system, external devices, or the mechanical resistance module, such as weight measurements in kg or LBS, providing the user with real-time feedback and interaction with the hybrid resistance generating system. The display may also be a smartphone magnetically attached to the housing and wirelessly charged via a wireless charging stand.

[0063] On the other hand, this application relates to a fitness device. The fitness device includes a main body, a hybrid resistance generating system according to any of the foregoing embodiments, and at least one pulley attached to the main body that guides a first cable to a user interface for applying force against a resulting resistance source, wherein the user interface is attached to the first cable.

[0064] In a preferred embodiment, the fitness equipment is designed as a power rack attachment, a freestanding tower, a squat rack, a half rack, a power rack, or a Smith machine. This fitness equipment is designed to allow for easy integration into home gyms and professional fitness centers, making good use of space and investment by serving multiple purposes and supporting a wide variety of workouts.

[0065] A power rack is preferably a large, cage-like structure with four vertical posts and horizontal bars at the top and bottom. It typically includes adjustable hooks and a safety bar that can be moved to various heights. This equipment is versatile, allowing for a wide variety of exercises besides squats, such as bench presses, overhead presses, and deadlifts. Power racks are available in various sizes and variations, including half-racks, wall-mounted racks, and folding racks, each preferably having four or more posts.

[0066] The squat rack is preferably a simple form of a strength rack. It comprises two vertical columns or a single connected unit that supports the barbell at a fixed or adjustable height. The squat rack may also have a pull-back machine or Smith machine attached to it.

[0067] Preferably, strength training equipment is fitness equipment designed to assist users in resistance training exercises. These machines typically utilize weight stacks, hydraulic resistance, or other mechanisms to provide adjustable resistance. Strength training equipment guides users along a fixed path, which helps ensure proper form of movement and reduces the risk of injury. They are commonly used in gyms, fitness centers, and home workout spaces.

[0068] The Smith machine is preferably a weight training device integrated into a strength machine or strength rack, comprising a barbell fixed within rails, allowing it to move vertically along a guided path. It is preferably designed for performing exercises such as squats, bench presses, and shoulder presses. The barbell can be locked at various heights using a safety hook.

[0069] A power tower is preferably a fitness device designed for bodyweight-based exercises targeting the upper body and core. It typically includes pull-ups, chin-ups, dips, push-ups, and knee raises. The power tower is preferably constructed of a freestanding frame and features padded handles and back support to facilitate these exercises.

[0070] In general, the user interface of fitness equipment allows users to apply resistance to exercise their muscles. The user interface can take many forms, including (but not limited to) single handles, long bar handles, lat pulldown handles, ropes, etc.

[0071] Furthermore, it is also possible for the user interface to include embodiments that provide input signals to the control unit of the mechanical resistance module. Providing input signals to the control unit allows users to easily customize their workout experience by selecting desired resistance levels, exercise duration, and other parameters, thereby improving user satisfaction and workout personalization. The components providing input signals can include a variety of user-friendly options, such as buttons, rotary adjustment rings, touchscreens, or microphones for voice commands, which enhances accessibility. By enabling users to interact directly with the control unit of the mechanical resistance module, the user interface facilitates immediate adjustment of the workout, allowing users to quickly respond to their own comfort and performance levels, resulting in a more effective and enjoyable workout. The user interface preferably includes a communication unit and a rechargeable battery that allows input signals to be sent to the mechanical resistance module. It may also include a memory or data processing unit.

[0072] Preferably, the user interface is designed as a handle with a rotating adjustment ring and tactile buttons, allowing the user to increase, decrease, or stop the resistance. This technology can be considered as single-thumb control, enabling operation with only one finger. Handles of different sizes and shapes are preferably available, depending on the type of exercise.

[0073] Users can begin their workout using only their body weight and activate the mechanical resistance from the mechanical resistance module by simply rotating their thumbs on the handles. The handles can be battery-powered, and the batteries can be charged by plugging a USB-C cable directly into the mechanical resistance module. Signals from the handles can be wirelessly transmitted to the mechanical resistance module.

[0074] On the other hand, this application relates to a method for adjusting the force applied by a user to a fitness device according to the above embodiments.

[0075] The method may include the following steps: applying force against a resulting resistance source via a user interface, and / or acquiring the motion of the weight block of the weight stack via a sensor system, particularly the velocity and / or acceleration of the motion, and / or providing the data acquired by the sensor system to the control unit of the mechanical resistance module, and / or detecting a decrease in velocity and / or acceleration relative to the previously acquired data by the sensor system via the control unit, and adjusting a second resistance source via the control unit of the mechanical resistance module.

[0076] This method uses captured sensor data to automatically respond to the user's condition and adjust the resistance of the mechanical resistance module accordingly. For example, when the sensor system detects that the user is beginning to feel fatigued (indicated by a slowing of repetitive movements), it will reduce the mechanical resistance. This allows the user to continue exercising without having to stop due to heavy weights or fatigue, a feature impossible to achieve with traditional fitness equipment that includes iron weights.

[0077] Optionally, the method may include the following steps: applying force against a resulting resistance source via a user interface, or providing an input signal to a control unit via a user interface, and adjusting a second resistance source via the control unit of the mechanical resistance module. The ability to adjust resistance during exercise by moving only a thumb to provide user input offers high flexibility in exercise programs, allowing users to quickly switch between different training modes (such as warm-up, endurance, or strength modes) without interrupting their workout.

[0078] In another alternative method, the method may include the following steps: providing an input signal to the control unit of the mechanical resistance module, the input signal setting the control unit in an automatic training mode, applying force against the resulting resistance source through a user interface to raise the weight block of the weight stack, reducing the force against the resulting resistance source to lower the weight block of the weight stack, and adjusting a second resistance source through the control unit.

[0079] The automatic training mode simplifies the user experience by allowing the fitness equipment to autonomously adjust resistance levels based on a pre-defined algorithm. This optimizes training efficiency and effectiveness without requiring continuous user interaction. The input signals can be provided by a user interface or an external device.

[0080] In another alternative approach, users can use a mechanical resistance module to fine-tune the weight provided by physical weight blocks, such as traditional iron weight blocks. For example, a user can select a 40kg iron weight block as their training weight and add the equivalent of 2kg of electrical resistance to achieve a total weight of 42kg. This total weight is dominated by the tactile feedback from the iron weight block, with almost imperceptible electrical resistance. This ability to fine-tune to 42kg is impossible with traditional strength equipment, as the iron blocks are typically 5kg or 10lbs. This fine-tuning is particularly important for breaking through so-called performance plateaus, where users need to gradually increase small weights between 1kg and 2kg to reach new performance levels.

[0081] Those skilled in the art will recognize that the advantages, technical effects, and preferred embodiments discussed in conjunction with the hybrid resistance generating system and fitness equipment are similarly applicable to methods for adjusting the force applied by a user to the fitness equipment. Likewise, all the advantages, technical effects, and preferred embodiments described in conjunction with this method can also be transferred to the hybrid resistance generating system and fitness equipment.

[0082] Other examples of embodiments are explained in more detail below with reference to the accompanying drawings. The invention is not intended to be limited to these exemplary embodiments only. They are merely used to explain the invention in more detail. The invention is intended to cover all objects that will be apparent to those skilled in the art now and in the future as to the implementation of the invention. Attached Figure Description

[0083] Figure 1 A preferred embodiment of the hybrid resistance generation system is shown in perspective.

[0084] Figure 2 A cross-sectional view of a preferred embodiment of a hybrid resistance generation system having two chambers is shown.

[0085] Figure 3 A cross-sectional view of a preferred embodiment of a mixing resistance generation system having four chambers is shown.

[0086] Figure 4 A schematic diagram of a preferred embodiment of a hybrid resistance generation system using a laser device as a sensor system is shown.

[0087] Figure 5A flowchart outlining a method for adjusting the force applied by a user to a preferred fitness device is shown.

[0088] Figure 6 A flowchart outlining another method for adjusting the force applied by a user to a preferred fitness device is shown.

[0089] Figure 7 A flowchart outlining another method for adjusting the force applied by a user to a preferred fitness device is shown.

[0090] Figure 8 A preferred embodiment of the fitness equipment is shown in perspective.

[0091] Figure 9 A partial view of a preferred embodiment of the fitness equipment is shown, particularly illustrating two hybrid resistance generation systems.

[0092] Figure 10 A partial view of a preferred embodiment of the fitness equipment is shown, particularly illustrating two hybrid resistance generation systems. Detailed Implementation

[0093] Some parts of the embodiments have similar or identical parts. Similar or identical parts may have the same name and / or reference numerals. Where appropriate, the description of one part may be applied to another similar part by reference, thereby reducing textual repetition without limiting this disclosure.

[0094] Figure 1 A preferred embodiment of the hybrid resistance generating system 63 is shown in perspective. The hybrid resistance generating system 63 is preferably intended for use in fitness equipment 1.

[0095] The hybrid resistance generation system 63 includes a sensor system 35, a weight stack 5, and a mechanical resistance module 7. All components of the hybrid resistance generation system 63 are encapsulated in a housing 64.

[0096] The hybrid resistance generation system 63 is preferably integrated into the fitness equipment 1 in such a manner that the weight stack 5 is positioned between the two rod tubes 53 of the fitness equipment 1, so that each weight block of the weight stack 5 can be vertically guided when lifted by the first cable 13. A user interface can be attached to the first cable 13, allowing force to be applied to the first cable 13 by the user. The housing 64 has an opening on its upper side through which the two rod tubes 53 of the fitness equipment 1 are inserted, allowing the rod tubes 53 of the fitness equipment 1 to interact with the weight stack 5.

[0097] The housing 64 has an opening 70, which is configured, for example, to observe the movement of the various components, such as the weight block of the weight stack 5, during exercise. Additionally, the opening 70 may be configured to provide an air inlet for cooling the resistance module 7.

[0098] Furthermore, the hybrid resistance generation system 63 may also include a display 67. The display may be an LCD display and is preferably located on the side wall or front of the housing 64 so that the LCD display is visible to the user during exercise. The display 67 is capable of displaying data processed by the control unit of the sensor system 35, external devices, or the mechanical resistance module 7, such as the weight measurement of the weight stack 5 in kg or LBS, the resistance measurement of the mechanical resistance module 7, or the number of repetitive movements performed by the user during exercise.

[0099] Figure 2 A cross-sectional view of a preferred embodiment of a hybrid resistance generation system 63 having two chambers 65 is shown. In this figure, the front side of the housing 64 has been virtually removed to allow a view of the interior of the housing 64.

[0100] The weight stack 5 includes multiple weight blocks capable of coupling with the weight sword 43. The weight stack 5 provides a first resistance source, while the mechanical resistance module 7 provides a second resistance source. The two resistance sources are connected in series, such that the resulting resistance source is applied to the first cable 13.

[0101] The first cable 13 is coupled to the weight sword 43, and specifically to the plate 50 of the weight sword 43. The plate 50 of the weight sword 43, as well as all the weight blocks of the weight stack 5, have through holes 56 to guide the rod tube 53 of the fitness machine 1.

[0102] Furthermore, the weighted sword 43 also has a shaft 55 with axially spaced openings, at the end of which is connected to the second cable 14. The shaft 55 is specifically designed for use with the aid of a pin 18 ( Figure 1 , Figure 2 or Figure 3 (Not shown in the image) The weight block of the weight stack 5 is coupled to the weight sword 43 via the axially spaced opening.

[0103] The second cable 14 is used to connect the mechanical resistance module 7 and the weight sword 43, so that the resistance generated by the weight stack 5 is connected in series with the resistance generated by the mechanical resistance module 7.

[0104] In this respect, the weight stack 5 is located in the first chamber 65, and the mechanical resistance module 7 is located in the second chamber 65, which is located below the first chamber 65. Two pulleys 66 guide the second cable 14 to the weight sword 43 of the weight stack 5.

[0105] The mechanical resistance module 7 includes an electric motor 31 with a winch 33, and a second cable 14 that can be wound onto or unwound from the winch 33.

[0106] In addition, the sensor system 35 includes a load cell 41. The load cell 41 is directly mounted on the plate 50 of the weight sword 43. The load cell 41 is connected to the end of the cable 13, which can be coupled to the user interface of the fitness equipment 1, such as a handle. The load cell 41 can be connected to the plate 50 of the weight sword 43 via a threaded connection, so that the load cell 41 is securely anchored to the plate 50 and is capable of measuring the force acting between the cable 13 and the plate 50.

[0107] Figure 3 A cross-sectional view of a preferred embodiment of a mixing resistance generation system 63 having four chambers is shown. Similar to... Figure 2 The front side (virtually) of the outer casing 64 is removed.

[0108] In this embodiment, the housing 64 is divided into four chambers 65. In this case, the weight stack 5 is located in the first chamber 65. The components of the mechanical resistance module 7 are distributed into the other two chambers 65. Thus, the electric motor 31 of the mechanical resistance module 7 is located in the second chamber 65, while the winch 33 of the mechanical resistance module 7 is located in the third chamber 65.

[0109] In the fourth chamber 65, located at the upper left corner of the housing 64, a holder for a smartphone or the like is provided. The housing 64 may have an opening 70 on the front side at the location of the fourth chamber 65, through which a user can see the smartphone from the outside when it is inserted into the fourth chamber 65.

[0110] Figure 4 Another preferred embodiment of the hybrid resistance generating system 63 is shown. This embodiment is shown in a schematic cross-sectional view, with the hybrid resistance generating system 63 shown from a transverse angle.

[0111] The hybrid resistance generation system 63 includes a laser device 68, which is located below the lowest weight block of the weight stack 5 and points towards pin 18 of the weight stack 5. For example, the laser device 68 may be located in another chamber 65 below chamber 65 of the weight stack 5.

[0112] Laser device 68 is configured to emit a laser beam 69 toward pin 18 and analyze the reflection of the laser beam 69 on pin 18. Pin 18 includes a shaft and a pin head. The laser beam 69 is specifically directed toward the pin head, while the pin shaft is inserted into the weight stack 5 and couples the various weight plates or weight blocks to the weight sword 43.

[0113] Each plate of the weight stack 5 has a predetermined distance between its initial position (a) and the laser device 68. The control unit that controls the laser device 68 can assign a certain weight to the predetermined distance. This allows it to determine how many weight plates have been lifted.

[0114] For example, in the initial position (a), the distance between the third block from the top of the weight stack 5 and the laser device 68 is x. The laser device 68 knows from stored data that pin 18 is the third weight block inserted into the weight stack 5 at a distance x. When it is lifted to the second position (b), the three weight blocks are lifted to a distance y. Each weight block weighs 5 kg and the weight sword 43 weighs 2 kg, so the control unit is able to determine that the user is lifting a physical weight of 17 kg.

[0115] When the lifted weight returns from position (b) to or near position (a), the laser device can determine that one repetition has been completed based on the distance x. In this way, it can calculate the number of repetitions.

[0116] It is also disclosed that the laser device 68 can be used independently with the conventional weight stack 5, without other components of the mixed resistance generation system 63.

[0117] Figure 5 This is a flowchart illustrating a preferred method 1000 for adjusting the force applied by a user to a fitness machine 1. At 1002, method 1000 includes applying a force via a user interface against a resulting resistance source. At 1004, it includes acquiring the motion of the weight block of the weight stack 5 via a sensor system 35, particularly the velocity and / or acceleration of the motion. At 1006, the method includes providing the data acquired by the sensor system 35 to a control unit 34 of a mechanical resistance module 7. At 1008, the control unit 34 detects a decrease in velocity and / or acceleration relative to the data previously acquired by the sensor system 35. At 1010, the control unit 34 adjusts a second resistance source.

[0118] Handling a large number of weight blocks in weight stack 5 can be risky. By dividing the weights between weight stack 5 and the weight blocks in mechanical resistance module 7, digital safety measures can be implemented to gradually reduce or completely shut down mechanical resistance module 7 in the event of a hazard.

[0119] When the hybrid resistance generation system 63 detects that the user is beginning to fatigue, the sensor system 35 and / or the control unit 34 of the mechanical resistance module 7 can notice the slowing of repetitive movements by measuring slower triaxial accelerometer motion and longer fatigue rest time, and will reduce mechanical resistance.

[0120] For example, a user can select a 40kg weight block in weight stack 5 and an equivalent 20kg mechanical resistance. If the user feels fatigued during exercise, the sensor system 35 and / or control unit 34 will detect this by recording slower pushes / pulls onto the weight block in weight stack 5 (typically at the end of a set of exercises). The mechanical resistance module 7 will then reduce the mechanical resistance by 5kg, and subsequently by 1kg with each repetition. This allows the user to continue exercising without having to stop due to heavy weights or fatigue, a feature impossible with traditional physical weight blocks.

[0121] Figure 6 A flowchart outlining another preferred method 1000 for adjusting the force applied by a user to a preferred fitness device 1 is shown. At 1002, method 1000 includes applying a force via a user interface against a resulting resistance source. At 1003, it includes providing an input signal to a control unit 34 via the user interface. At 1010, method 1000 includes adjusting a second resistance source via the control unit 34. Method 1000 allows the user to manually adjust and / or stop the resistance of the mechanical resistance module 7 via a user interface. For this purpose, the user interface may include input devices such as a rotary adjustment ring or buttons.

[0122] Figure 7 A flowchart outlining another method 1000 for adjusting the force applied by a user to a preferred fitness device 1 is shown. At 1001, an input signal is provided to the control unit 34 of the mechanical resistance module 7, which sets the control unit 34 to an automatic training mode. At 1002, the user applies force against the resulting resistance source via the user interface 11, thereby raising the weight block of the weight stack 5. At 1005, the user reduces the force against the resulting resistance source, thereby lowering the weight block of the weight stack 5. At 1010, the control unit 34 adjusts the second resistance source.

[0123] The comparison between the described method 1000 and traditional training demonstrates the advantages of the preferred fitness equipment 1.

[0124] For pull-back exercises on a traditional strength frame without the mechanical resistance module 7, users can begin by selecting a warm-up weight, such as between 20kg and 40kg, depending on the user's strength and experience. After warming up, users can perform three sets of exercises using a physical weight, such as 60kg, with each set consisting of 12-15 repetitions.

[0125] During the workout, each time the user needs to change the weight, they must stand up from their seated position. This involves releasing their thighs from under the thigh pads, leaving the bench, and adjusting the weight using the weight pins. The user then returns to the bench and secures their thighs under the pads again. In the final repetitions, as fatigue sets in, the user may struggle to complete the set. If the weight can be reduced to 55kg or 50kg in the last few repetitions of this workout, they may be able to do 2-5 more repetitions and reach maximum muscle tension. However, with traditional weight systems, this is not possible without interrupting the workout for at least 10 seconds, including time spent repositioning to manually change the weight.

[0126] Therefore, the muscles are not optimally trained, and the duration of muscle tension is shorter than that achievable with progressively lighter weights. Furthermore, manually changing the weight repeatedly after every 2-3 repetitions becomes impractical and inefficient.

[0127] The preferred fitness equipment 1 is designed as a pull-back machine with an electromechanical resistance module 7 on a strength frame. It can start similarly to traditional fitness equipment, with the user selecting a warm-up weight between 20kg and 40kg. The user can then select their desired training program on the electromechanical resistance module 7, in this case, by voice control or manual operation on an external device's software application to select drop sets.

[0128] With the mechanical resistance module 7, changing the weight of the weight stack 5 during a workout may become unnecessary. The mechanical resistance module 7 can, for example, increase the mechanical resistance at the start of the workout to achieve a total resistance equivalent to 70kg, and gradually decrease the weight as fatigue is detected, reducing resistance in 1kg increments to ensure maximum muscle tension. The user can remain seated and does not need to interrupt the workout to change the weight.

[0129] Most importantly, the resistance adjustment can be performed after every 2-3 repetitions while maintaining a physical base weight of 40kg, ensuring perfect visual, auditory, and inertial feedback from the weight stack 5. Furthermore, if the user prefers a different weight setting than the one automatically adjusted by the module, the user can manually adjust the resistance at any time by simply turning the rotary adjustment ring on the user interface with one finger.

[0130] Another example of the described method 1000 is as follows: A user can set the weight block of weight stack 5 to 40 kg for high-position pulldowns. Depending on their selected program (automatic training mode) (e.g., "normal mode" or "decreasing group mode"), the mechanical resistance module 7 will increase the resistance by the equivalent of 1 kg each time the user pulls down. This allows the resistance to increase gradually with each pulldown, for example, gradually increasing from 40 kg to 55 kg in 1 kg increments, without needing to change the physical weight block 5.

[0131] The mechanical resistance module 7 can operate like a pyramid, gradually increasing and decreasing resistance within a set.

[0132] The maximum tension mode is designed to maximize muscle tension and engagement within a single set. The user selects, for example, a physical weight block 5 with an initial weight of 50 kg. The mechanical resistance module 7 can initially be set to zero. As the user begins the set, the mechanical resistance module 7 gradually adds resistance equivalent to 2 kg with each repetition (pyramid-like increase). This increase continues until the total weight reaches the user's maximum weight for one repetition, which is 90 kg in this example. The mechanical resistance module 7 is able to store the peak weight of a maximum weight for one repetition, so it remembers the peak weight of a previous maximum weight for one repetition and builds a pyramid until a new maximum weight is reached.

[0133] At the peak weight (90kg), the user will experience maximum resistance for a short period, allowing the muscles to fully engage in the workout. After reaching the peak, the mechanical resistance module 7 begins to gradually reduce the weight by 2kg with each subsequent repetition. This reduction continues until the weight returns to zero mechanical resistance, leaving only a physical weight stack of 50kg. This gradual increase and decrease in weight targets different muscle fibers, enhancing overall muscle development.

[0134] Another example covered by Method 1000 is as follows: In a variable resistance mode with mechanical resistance module 7, the resistance changes non-linearly within a single repetitive motion. Unlike the gradual or linear progression of resistance increasing or decreasing at a constant rate, this mode involves unpredictable and dynamic adjustment of the resistance at different points in the motion.

[0135] At the start of the repetitive movement, the user sets the weight of weight stack 5 to a comfortable level, such as 50kg. As the single repetition progresses, the mechanical resistance module 7 detects muscle engagement and adjusts the resistance accordingly. Midway through the repetition, the resistance increases or decreases sharply. These variations can be programmed to differ in intensity and duration, creating a challenging environment for the muscles. Near the end of the repetition, the resistance can gradually decrease or reach a peak based on a preset program. This unpredictability ensures that the muscles continuously adapt to the changing resistance. The non-linear changes in resistance force the muscles to respond to the changing load, resulting in greater muscle activation. The unpredictability of resistance changes helps prevent plateaus in training levels. Muscles must continuously adapt to new challenges, promoting sustained improvement and growth. By varying the load throughout the repetition, stress on joints and tendons can be minimized, reducing the risk of overuse injuries common in constant or linear resistance training.

[0136] Repetition refers to the number of times a user performs a specific exercise in a set, while a set refers to a specific number of repetitive actions performed continuously without rest.

[0137] Figure 8 A preferred embodiment of the fitness equipment 1 is shown in perspective. The fitness equipment 1 is designed as a strength frame, having a body 3 formed, in particular, by frame elements. The fitness equipment 1 includes two hybrid resistance generating systems 63. Each of these hybrid resistance generating systems 63 is located at the base of the body 3 and is respectively mounted between two rod tubes 53 of the fitness equipment 1, the rod tubes 53 being used to guide the weight stack 5 of the hybrid resistance generating system 63. Each hybrid resistance generating system 63 is respectively connected to a first cable 13.

[0138] Furthermore, the fitness equipment 1 has pulleys 19 attached to the main body 3, which guide the first cable 13 to the user interface, where the user can apply force against a source of resistance. The user interface attached to the first cable 13 is not shown in the figure.

[0139] Figure 9 and Figure 10 Each figure shows a partial view of a preferred embodiment of the fitness equipment 1, particularly illustrating two hybrid resistance generating systems 63. Both figures represent... Figure 8 The detailed parts, and therefore referenced as Figure 8 See the provided description for further details.

[0140] In particular, Figure 10 This shows a view with the outer casing 64 of one of the hybrid resistance systems 63 removed. This reveals the weight stack 5 and the mechanical resistance module 7, which are separated from each other by an intermediate layer or wall.

[0141] List of reference numerals

[0142] 1. Fitness equipment

[0143] 3. Main Body

[0144] 5 physics weight blocks / weight stacks

[0145] 7-Mechanical Resistance Module

[0146] 13 First Cable

[0147] 14 Second cable

[0148] 18 sales

[0149] 19 Pulleys

[0150] 31 Electric motor

[0151] 33. Winch

[0152] 34 Control Unit

[0153] 35 Sensor Systems

[0154] 41 Weighing Sensor

[0155] 42 Triaxial Accelerometer

[0156] 43 Heavy Swords

[0157] 44 batteries

[0158] 50 boards

[0159] 53. The poles of fitness equipment

[0160] 55 Shafts with axially spaced openings

[0161] 56 Through holes for guiding the rod tube of the fitness machine

[0162] 63 Mixed Resistance Generation System

[0163] 64 Housing of the Mixed Resistance Generation System

[0164] 65. Chambers within the outer casing

[0165] 66. Pulleys of the chamber system

[0166] 67 Monitors

[0167] 68 Laser Equipment

[0168] 69 laser beams

[0169] 70 Openings in the casing

Claims

1. A hybrid resistance generating system (63) for fitness equipment, comprising: The outer casing (64) preferably includes at least two chambers (65); Sensor system (35); A weight stack (5) having multiple weight blocks, the weight stack being able to couple with a weight sword (43) to provide a first source of resistance; Mechanical resistance module (7) that provides a second resistance source; The first resistance source and the second resistance source are connected in series, such that the resulting resistance source is applied to the first cable (13), which is preferably coupled to the weight sword (43).

2. The hybrid resistance generating system (63) according to claim 1, Its features are, The second cable (14) connects the mechanical resistance module (7) and the weight sword (43) to each other.

3. The hybrid resistance generating system (63) according to claim 1 or 2, Its features are, The weight stack (5) is located in the first chamber (65), and the mechanical resistance module (7) is located in the second chamber (65).

4. The hybrid resistance generating system (63) according to any one of the preceding claims, Its features are, The hybrid resistance generating system (63) also includes at least one pulley (66) that guides the second cable (14) to the weight sword (43) of the weight stack (5).

5. The hybrid resistance generating system (63) according to any one of the preceding claims, Its features are, The mechanical resistance module (7) includes an electric motor (31) with a winch (33), and the second cable (14) can be wound onto or unwound from the winch.

6. The hybrid resistance generating system (63) according to claim 5, Its features are, The electric motor (31) is designed as a brushless external rotor motor.

7. The hybrid resistance generating system (63) according to claim 5 or 6, Its features are, The weight stack (5) is located in the first chamber (65), the electric motor (31) is located in the second chamber (65), and the winch (33) is located in the third chamber (65).

8. The hybrid resistance generating system (63) according to any one of claims 5 to 7, Its features are, The second chamber (65) and / or the third chamber (65) are located below the first chamber (65).

9. The hybrid resistance generating system (63) according to any one of the preceding claims, Its features are, The mechanical resistance module (7) includes a control unit (34), which has a data processing unit for controlling the second resistance source and a communication unit for data communication.

10. The hybrid resistance generating system (63) according to any one of the preceding claims, Its features are, The sensor system (35) is configured to acquire the resistance of the first resistance source and / or the second resistance source and / or the resulting resistance source, and / or acquire the motion of the weight stack (5) and / or the weight sword (43), and / or acquire the motion of the first cable (13).

11. The hybrid resistance generating system (63) according to any one of the preceding claims, Its features are, The sensor system (35) includes a laser device (68) located below the lowest weight block of the weight stack (5) or above the plate (50) of the weight sword (43) and pointing towards the pin (18) of the weight stack (5). The laser device (68) is configured to emit a laser beam (69) toward the pin (18) and analyze the reflection of the laser beam (69) on the pin (18).

12. The hybrid resistance generating system (63) according to any one of the preceding claims, Its features The hybrid resistance generating system (63) includes at least one display (67) capable of displaying data processed by the control unit (34) of the mechanical resistance module and / or the control unit of the sensor system (35).

13. A fitness device (1), comprising: a. Main body (3), b. The hybrid resistance generating system (63) according to any one of the preceding claims, c. At least one pulley (19) attached to the body (3) guides the first cable (13) to the user interface, the user interface being used to apply force against a resulting resistance source, wherein the user interface is attached to the first cable (13).

14. The fitness equipment (1) according to claim 13, Its features are, The mechanical resistance module (7) and the sensor system (35) communicate with an external device having a data processing unit and a communication unit. The sensor system (35) includes components for providing acquired data to the external device (45), and / or The user interface (11) includes components for providing input signals to the external device (45), and / or The external device (45) is configured to process data provided by the sensor system (35) and / or process input data provided by the user interface and / or send control commands to the mechanical resistance module (7).

15. A method (1000) for adjusting the force applied by a user to a fitness device according to claim 14, Its features are, The method includes the following steps: i. Apply force through the user interface (11) to counteract the resulting resistance source, ii. The motion of the weight block of the weight stack (5), particularly the velocity and / or acceleration of the motion, is acquired by the sensor system (35). iii. The data acquired by the sensor system (35) is provided to the control unit (34) of the mechanical resistance module (7). iv. The control unit (34) detects the decrease in velocity and / or acceleration relative to data previously acquired by the sensor system (35). v. Adjust the second resistance source via the control unit (34); and / or i. Apply force through the user interface (11) to counteract the resulting resistance source, ii. Input signals are provided to the control unit (34) through the user interface (11). iii. Adjust the second resistance source via the control unit (34); and / or i. Provide an input signal to the control unit (34) of the mechanical resistance module (7), the input signal setting the control unit (34) in automatic training mode. ii. A force is applied through the user interface (11) to counteract the resulting resistance source, thereby causing the weight block of the weight stack (5) to be lifted. iii. Reduce the force against the source of resistance, thereby causing the weight block of the weight stack (5) to be lowered. iv. Adjust the second resistance source via the control unit (34).

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