Shoes with center of mass markers

Abstract

This utility model relates to the field of footwear and apparel technology, specifically to a sports shoe with a center of gravity marker. The sports shoe includes an outsole and an upper connected to the top of the outsole. The outsole, along its longitudinal direction from back to front, comprises a heel end, a heel area corresponding to the rear of the foot, a midfoot area corresponding to the arch, and a forefoot area corresponding to the front of the foot. The center of gravity of the sports shoe is located inside the outsole, and the longitudinal distance between the heel end and the center of gravity is approximately 58.1% to 70% of the total length of the sports shoe. This utility model, by scientifically adjusting the position of the center of gravity of the sports shoe, shifting it moderately forward towards the toe, can effectively reduce energy consumption during exercise, helping athletes achieve more efficient movement, making running easier for runners, and providing a better sports experience for sports enthusiasts and professional athletes.

Description

Technical Field

[0001] This utility model relates to the field of footwear and apparel technology, specifically to a sports shoe with a centroid marker. Background Technology

[0002] In the development of contemporary competitive sports, long-distance running, as a sport that demands high levels of endurance, technique, and equipment from athletes, relies not only on scientific and systematic training methods for improved performance but also on technological innovations in sports equipment. As a crucial medium for direct contact between athletes and the ground, the design characteristics of running shoes have a profound impact on running economy, energy consumption, and injury prevention. With the interdisciplinary integration of materials science, biomechanics, and sports engineering, modern running shoe technology has evolved from its traditional single protective function into a key piece of equipment capable of actively enhancing athletic performance. Its technological development fully reflects humanity's relentless exploration and pursuit of the limits of athletic performance.

[0003] From a broader perspective, continuous innovation in athletic shoe technology is not only of great value to competitive sports, but also has a profound impact on the field of mass fitness. With the popularization of healthy living concepts, more and more people are participating in long-distance running, and scientifically designed athletic shoes can effectively reduce the risk of sports injuries and improve training results.

[0004] Optimizing athletic shoe technology is a multidisciplinary and multi-dimensional collaborative systemic project, and its development level directly affects the competitive performance and running experience of long-distance runners. Although current athletic shoe technology has made significant progress, there are still aspects that need improvement in long-distance running scenarios. For example, athletes often find it difficult to choose the most suitable athletic shoes based on their own pace, which to some extent limits their performance improvement. Therefore, developing an athletic shoe that can adapt to the pace needs of different athletes is of great significance for optimizing long-distance running performance. Utility Model Content

[0005] Therefore, the purpose of this invention is to provide a sports shoe with a centroid marker, so that athletes can improve their athletic performance.

[0006] This utility model provides a sports shoe with a center of gravity marker. The sports shoe has, in the longitudinal direction from back to front, a heel end, a heel area corresponding to the back of the foot, a midfoot area corresponding to the arch of the foot, and a forefoot area corresponding to the front of the foot. The sports shoe includes an outsole and an upper connected to the top of the outsole. The center of gravity of the sports shoe is located inside the outsole, wherein the horizontal distance between the heel end and the center of gravity is approximately 58.1% to 70% of the total length of the sports shoe.

[0007] The athletic shoes of this invention effectively reduce energy consumption during exercise, helping athletes achieve more efficient movements and making running easier, thus significantly improving athletic performance and providing a better sports experience for sports enthusiasts and professional athletes. Furthermore, by placing the center of gravity of the athletic shoe further forward compared to existing athletic shoes, energy utilization efficiency during running is significantly optimized. This design improvement effectively reduces the metabolic energy consumption of the lower limb muscle groups during exercise, allowing athletes to reduce energy expenditure by approximately the same amount while maintaining the same exercise intensity.

[0008] In a preferred embodiment, the horizontal distance between the heel tip and the center of mass is approximately 60% to 65% of the total length of the athletic shoe.

[0009] In a preferred embodiment, the forefoot area is fitted with an accessory for increasing the weight of the forefoot area.

[0010] In a preferred embodiment, the accessory is at least one of a carbon plate, a TPU block, a metal block, or a polymer material block.

[0011] In a preferred embodiment, the heel region is formed with a hollow structure to reduce the weight of the heel region.

[0012] In a preferred embodiment, the volume of the forefoot region is larger than the volume of the heel region.

[0013] In a preferred embodiment, the density of the forefoot region is greater than the density of the heel region.

[0014] In a preferred embodiment, the midfoot region has a hollow structure, and the volume of the forefoot region is larger than the volume of the hindfoot region.

[0015] In a preferred embodiment, the side of the outsole has a marking portion for identifying the center of mass through a lateral projection.

[0016] In a preferred embodiment, the marking portion includes an intersecting line with the intersection of the vertical projections, the vertical projections passing through the intersection of the intersecting lines, or the marking portion includes a circle or a polygon, the horizontal projections passing through the center of the circle or the polygon.

[0017] In a preferred embodiment, the marking portion is designed to be formed on the outsole via surface embossing, texturing, polishing, printing, or cutout processing. Attached Figure Description

[0018] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings, wherein:

[0019] Figures 1 to 2 This is a schematic diagram illustrating the measurement of the center of mass position of existing sports shoes using the suspension method;

[0020] Figure 3 These represent the work done by the rectus femoris muscle at different center-of-mass positions.

[0021] Figure 4 These are the work done by the soleus muscle at different center-of-mass positions;

[0022] Figure 5 These represent the work done by the tibialis posterior muscle at different center-of-mass positions.

[0023] Figure 6 These represent the work done by the gluteus maximus at different center-of-mass positions.

[0024] Figure 7 These represent the work done by the gastrocnemius muscle at different center-of-mass positions.

[0025] Figure 8 These represent the work done by the iliopsoas muscle at different center-of-mass positions.

[0026] Figure 9 These represent the work done by the psoas major muscle at different center-of-mass positions.

[0027] Figure 10 It is the sum of the work done by some lower limb muscles at different center-of-mass positions;

[0028] Figure 11 This is one embodiment of the sports shoe in this utility model;

[0029] Figure 12 This is another embodiment of the sports shoe in this utility model;

[0030] Figure 13 This is another embodiment of the sports shoe in this utility model;

[0031] Figure 14 This is another embodiment of the sports shoe in this utility model;

[0032] Figure 15 yes Figure 14 The enlarged view at point I shows the location of the shoe's center of mass;

[0033] Figure 16 This is another embodiment of the sports shoe in this utility model;

[0034] Figure 17 yes Figure 16 The enlarged view at point I shows the location of the shoe's center of mass.

[0035] Explanation of reference numerals in the attached figures

[0036] 10 - Heel area; 11 - Heel tip; 12 - Hollowed-out structure; 20 - Midfoot area; 30 - Forefoot area; 31 - Accessories; 40 - Outsole; 41 - Marking section; 50 - Upper. Detailed Implementation

[0037] The present invention will be further described in detail below with reference to specific embodiments. The embodiments given are only for illustrating the present invention and are not intended to limit the scope of the present invention.

[0038] In the following description, details of the present invention are set forth as preferred embodiments. Those skilled in the art will understand that modifications, including additions and / or substitutions, can be made without departing from the scope and spirit of the present invention. Specific details may be omitted so as not to obscure the present invention; however, this disclosure is written to enable those skilled in the art to practice the teachings herein without undue experimentation.

[0039] Terminology Definition

[0040] In this article, the term "athletic shoes" can be applied to a wide range of footwear suitable for various everyday or sporting occasions, including but not limited to: basketball shoes, walking shoes, running shoes, casual shoes, tennis shoes, soccer shoes, American soccer shoes, cross-training shoes, spiked shoes, etc.

[0041] Certain directional terms used in the description of the accompanying drawings below, such as “above,” “below,” and other directional terms, will be understood to have their normal meaning and refer to those directions as normally viewed in the drawings. Unless otherwise specified, the directional terms used in this specification are generally in accordance with the conventional directions understood by those skilled in the art.

[0042] In this invention, the term "inner side" refers to the position between the two feet, and "outer side" refers to the position away from the position between the two feet.

[0043] The term "longitudinal" refers to the direction in which a component extends a certain length. For example, the longitudinal direction of an athletic shoe extends between the forefoot and heel areas. The terms "forward" or "forward-facing" are used to refer to the general direction from the heel area toward the forefoot area, and the terms "backward" or "rearward-facing" are used to refer to the opposite direction, i.e., from the forefoot area toward the heel area. In some cases, a component can be identified by a longitudinal axis and the forward and backward longitudinal directions along that axis. The longitudinal direction or axis can also be referred to as the fore-rear direction or axis.

[0044] The term "lateral" refers to the direction in which a component extends a certain width. For example, the lateral direction of an athletic shoe extends between the outer and inner sides of the shoe. The lateral direction or axis can also be referred to as the lateral direction or axis, or the mid-outer direction or axis.

[0045] The term "vertical" or "upright" refers to a direction that is approximately perpendicular to both the horizontal and vertical directions. For example, in the case where the sole structure is laid flat on the ground surface, the vertical direction can extend upwards from the ground surface. It will be understood that each of these directional adjectives can be applied to an individual component of the sole structure. The term "upwards" or "facing upwards" refers to a vertical direction pointing towards the top of the component. The term "downwards" or "facing downwards" refers to a vertical direction opposite to the upwards direction, pointing towards the bottom of the component, and can generally point towards the bottom of the sole structure of the athletic shoe.

[0046] The terms “first,” “first,” “second,” “second,” and similar terms used in this utility model do not indicate any order, quantity, or importance, but are used to distinguish one component from other components.

[0047] The terms "joining", "fitting" and similar terms used in this utility model include both indirect connection of two components with the aid of an intermediate layer (e.g., adhesive, welding agent, etc.) or intermediate parts (e.g., connectors, transition parts, etc.) and direct connection of two components without the aid of any intermediate layer (e.g., adhesive, welding agent, etc.) or intermediate parts (e.g., connectors, transition parts, etc.).

[0048] The term "pace" as used in this invention refers to the time required for a runner to complete a unit distance (usually 1 kilometer or 1 mile), and is used to measure the speed and intensity of running.

[0049] The term "centroid" used in this invention refers to the average location of all mass distributions in an object or system, which can be regarded as the point of concentrated action of the mass of the entire object.

[0050] The term "heel tip" used in this invention refers to the very end of a sports shoe away from the toe.

[0051] The term "center of mass position" used in this invention refers to the percentage of the horizontal distance between the heel tip and the center of mass relative to the total length of the shoe. For example, if the center of mass is located at the heel tip, the center of mass position is 0%; if the center of mass is located at the toe, the center of mass position is 100%.

[0052] Running economy (RE) refers to the efficiency with which a runner consumes oxygen at a given speed, typically reflected in the energy expenditure required to maintain a certain pace. Better running economy means that a runner can maintain the same speed with less energy, thereby improving endurance performance (such as longer distances or faster speeds).

[0053] During running, an athlete's center of mass position significantly impacts running economy and performance. Vertically, excessive center of mass oscillation (such as "bouncing") increases energy expenditure because runners need to do extra work against gravity, leading to longer ground contact time and reduced propulsion efficiency. Elite runners typically control their vertical oscillation at 6-8 cm, lower than amateur runners, thus reducing energy waste. Horizontally, a moderate forward lean (approximately 5-10°) helps utilize gravity for propulsion, reduces the need for hamstring muscles, and improves economy; however, excessive forward leaning or landing with the feet too far forward increases braking effect and affects efficiency.

[0054] For long-distance runners, maintaining a stable center of mass trajectory is a key factor in improving running economy and endurance. Because long-distance races are long and prolonged, even small amounts of energy wasted can significantly impact final performance due to cumulative effects. Therefore, elite long-distance runners typically exhibit smoother vertical oscillations and more efficient forward shifts of the center of mass to reduce unnecessary energy expenditure and maintain a more sustained pace. Studies have shown that reducing vertical oscillation by 1 cm can potentially save approximately 1% of energy expenditure over a marathon, highlighting the importance of center of mass optimization for running economy.

[0055] Inspired by the mechanism by which the position of the human body's center of mass affects athletic economy, the inventors of this application explored the impact of the center of mass position of athletic shoes on athletes' performance. Through simulation analysis of the energy consumption of athletes wearing athletic shoes with different center of mass positions during exercise, the study found that the center of mass position of athletic shoes significantly affects the athlete's energy utilization efficiency.

[0056] Specifically, to accurately determine the position of an object's center of mass, existing technologies commonly employ the suspension measurement method. This method is based on the following mechanical principle: when an object is freely suspended from a point in a gravitational field and reaches static equilibrium, its center of mass must lie on the vertical line passing through that suspension point. In practice, first, any point on the object's surface is selected for the first suspension, and after the object comes to rest, the corresponding vertical line is marked. Then, the above operation is repeated at another non-collinear suspension point to obtain a second vertical line. In three-dimensional space, the intersection of these two vertical lines is the position of the object's center of mass. Figures 1 to 2 As shown, the inventors measured the center of mass of existing sports shoes on the market using the suspension method and found that the center of mass of common sports shoes is usually located at 53%-58%.

[0057] To investigate the impact of the center of gravity position of athletic shoes on athletes' performance, the inventors conducted extensive research and analysis on the biomechanical characteristics and energy consumption distribution of the major muscles in the lower limbs during long-distance running. The analysis showed that in long-distance running, the energy consumption of the lower limb muscles accounts for 82.5% of the total energy consumption of all muscles, and their coordinated working mechanism directly affects athletic efficiency and endurance performance. Specifically: the rectus femoris buffers impact force through eccentric contraction during landing and assists in knee extension during propulsion; the soleus muscle works continuously as an endurance muscle group to maintain ankle propulsion; the iliopsoas completes hip flexion through concentric contraction, ensuring stable stride rhythm; the tibialis posterior regulates arch stability during the stance phase, avoiding energy loss due to excessive inversion; the psoas major, in conjunction with the core muscles, maintains trunk-pelvis stability, reducing ineffective energy consumption; and the gluteus maximus, as the main hip extensor, provides stable power output for continuous push-off. Based on the key role of the aforementioned muscles in running biomechanics, this application selects the rectus femoris, gastrocnemius, soleus, iliopsoas, tibialis posterior, psoas major, and gluteus maximus as research subjects to quantitatively analyze their mechanical work characteristics during the running cycle.

[0058] Specifically, the inventors selected a long-distance runner weighing 65.9 kg and 173 cm tall as the research subject. The athlete's pace when wearing regular sports shoes was approximately 3 minutes per kilometer. The simulation process is as follows:

[0059] First, a multibody dynamic model of the athlete's limb muscles and bones was established, including data on muscle activation, force exertion time, and force value.

[0060] Secondly, the work done by the rectus femoris, gastrocnemius, soleus, iliopsoas, tibialis posterior, psoas major, and gluteus maximus muscles during a single gait was calculated under conditions of 3-point weight distribution and the center of gravity of the athletic shoe being at 40%, 50%, 60%, and 70% of its maximum position. The specific values ​​obtained are as follows: Figures 3 to 9 As shown. Figure 10 As shown, when the center of mass of the athletic shoe is located at 40%, 50%, 60%, and 70%, the total work done by the aforementioned muscles in one gait is approximately 261.9 J, 261.5 J, 261.12 J, and 261.14 J, respectively.

[0061] Taking a marathon as an example, the total distance is 42.195 kilometers. Assuming a stride length of 1.6 meters, there are 26,372 steps. It is known that the total energy expenditure for the entire race is approximately 2000 kcal, of which the lower limb muscles account for about 82.5%, or 1650 kcal. Based on the above calculations, if the athlete maintains a 3-minute pace throughout the race, and the center of gravity of the running shoe shifts from 40% to 60%, then the energy saved per step is approximately 0.8 J. The total energy saved throughout the race is approximately 5 kcal, representing about 0.31% of the energy consumed by the lower limb muscles.

[0062] Furthermore, since athletes' pace varies during training and competition, precise calculations can be performed for different paces to obtain athletic shoes suitable for various sports scenarios. Marathon runners' paces range from 3 minutes / km (3 mins) to 9 minutes / km (9 mins). The inventors of this application selected 3 mins, 4 mins, 5 mins, and 6 mins as research subjects and calculated the optimal center of mass position for the athletic shoes at different paces. At this optimal center of mass position, muscle work is minimized. The data obtained are shown in the table below:

[0063] Table 1

[0064]

[0065] Depend on Figure 10 As shown in Table 1, when the center of gravity of the athletic shoe is located between 58% and 68%, it can effectively reduce the athlete's energy consumption and improve athletic performance.

[0066] Based on the analysis of the center of mass measurement data of existing sports shoes, it is known that the center of mass of most mainstream sports shoes is concentrated in the 53%-58% range. The inventors of this application, through systematic sports biomechanical calculations and simulation analysis, discovered that by scientifically adjusting the center of mass of the sports shoe, shifting it slightly forward towards the toe, energy utilization efficiency during running can be significantly optimized. This design improvement effectively reduces the metabolic energy consumption of the lower limb muscle groups during exercise, reducing energy expenditure by approximately 0.3% while maintaining the same exercise intensity. This innovative design not only helps improve the competitive performance of professional athletes but also allows ordinary sports enthusiasts to have a more relaxed experience during long-distance running, achieving a dual improvement in exercise efficiency and comfort, and bringing a revolutionary sports equipment optimization solution to runners of different levels.

[0067] Therefore, in a preferred embodiment, the horizontal distance between the heel tip 11 and the center of gravity is approximately 58.1% to 70% of the total length of the athletic shoe. In a preferred embodiment of the present invention, the horizontal distance between the heel tip 11 and the center of gravity is approximately 59% to 69% of the total length of the athletic shoe. More preferably, the horizontal distance between the heel tip 11 and the center of gravity is approximately 60% to 67% of the total length of the athletic shoe. More preferably, the horizontal distance between the heel tip 11 and the center of gravity is approximately 60% to 65% of the total length of the athletic shoe. More preferably, the horizontal distance between the heel tip 11 and the center of gravity is approximately 62% to 65% of the total length of the athletic shoe. More preferably, the horizontal distance between the heel tip 11 and the center of gravity is approximately 63% to 65% of the total length of the athletic shoe. More preferably, the horizontal distance between the heel tip 11 and the center of gravity is approximately 64% of the total length of the athletic shoe.

[0068] The inventors hereby propose several feasible methods to achieve the forward shift of the center of gravity of athletic shoes. In one embodiment, referring to... Figure 11 An accessory 31 can be installed in the forefoot area 30 to increase the weight of the forefoot area 30. This accessory can be a carbon fiber plate, a TPU (thermoplastic polyurethane elastomer) block, a metal block, or other objects made of polymer materials obtained through 3D printing. The carbon fiber plate is typically composed of carbon fiber and a resin matrix, and features lightweight, high strength, good rigidity, high elasticity, excellent fatigue resistance, and corrosion resistance. It provides good support and stability without increasing the overall weight of the shoe, and can convert impact force into elastic potential energy for storage and release, reducing energy loss.

[0069] TPU is commonly used in shoe soles, especially in athletic and casual shoes. It provides excellent grip and stability, helping wearers maintain balance during activities like walking and running, and reducing the risk of slipping. At the same time, the elasticity of TPU soles effectively absorbs ground reaction forces, reducing the burden on the feet and joints and providing a comfortable cushioning effect.

[0070] In another implementation, such as Figure 12 As shown, the outsole 40 is made of a generally uniform material, which allows for the formation of a hollow structure 12 in the heel area 10 to reduce the weight of the heel area 10, thereby shifting the center of gravity of the athletic shoe to an ideal position.

[0071] Figure 13 This illustrates another preferred embodiment of the present invention, in order to move the center of mass forward, the volume of the forefoot region 30 can be set to be larger than the volume of the rearfoot region 10.

[0072] like Figure 14 As shown, in a preferred embodiment, the midfoot region 20 has a hollow structure 12, and the volume of the forefoot region 30 is larger than the volume of the heel region 10, which also enables the center of gravity of the athletic shoe to be shifted forward to the ideal position.

[0073] exist Figure 16 In the embodiment shown, a material with a density greater than that in the rear foot region 10 can be used in the forefoot region 30 to achieve a forward shift of the center of mass position.

[0074] As the analysis above shows, the optimal center of gravity position in athletic shoes can effectively improve an athlete's performance. However, when consumers purchase athletic shoes, there are no products on the market that directly meet their specific center of gravity position requirements, making it difficult for consumers to easily obtain athletic shoes that match their desired center of gravity position.

[0075] Therefore, this utility model provides a sports shoe with a center of mass marking. The sports shoe has, in the longitudinal direction from back to front, a heel end 11, a heel area 10 corresponding to the back of the foot, a midfoot area 20 corresponding to the arch of the foot, and a forefoot area 30 corresponding to the front of the foot. The sports shoe includes a sole 40 and an upper 50 connected to the top of the sole 40. The center of mass of the sports shoe is located inside the sole 40, and the side of the sole 40 has a marking portion 41 for the projection of the center of mass.

[0076] To help consumers identify the center of gravity of athletic shoes, such as Figures 14 to 17 As shown, in one embodiment, the inner or outer side of the sole of the athletic shoe may have a marking portion 41 with a centroid projection, the marking portion 41 including intersecting lines, and the projection being the intersection point of the intersecting lines. In another embodiment, the marking portion 41 may include a circle or a polygon, and the projection is the center of the circle or the polygon.

[0077] Here, the marking portion 41 can be implemented in various ways, such as surface embossing, texturing, polishing, printing, or cutout design.

[0078] The sports shoes of this invention can have a marking part 41 on the inner or outer side of the sole to indicate the center of mass position, allowing consumers to directly purchase sports shoes with a center of mass position suitable for their pace. This effectively reduces energy consumption during exercise, helps athletes achieve more efficient performance, makes running easier, and significantly improves athletic performance, providing a better sports experience for sports enthusiasts and professional athletes.

[0079] In addition, during the use of athletic shoes, the outsole 40 primarily serves a wear-resistant function, improving the shoe's durability. Outsole 40 is generally made of wear-resistant materials, such as rubber or other abrasion-resistant materials. Outsole 40 can be a single piece or divided into two sections, such as a forefoot section and a heel section, with each section potentially composed of multiple pieces. The outsole's hardness can be 60-70 degrees (Shore A); its slip resistance performance is: dry friction coefficient ≥0.7; wet friction coefficient ≥0.5.

[0080] The embodiments of this utility model have been illustrated and described herein, but those skilled in the art should understand that various modifications, omissions, and additions can be made without departing from the spirit and scope of this utility model. It should not be understood as limited to the specific embodiments described herein, but encompasses all possible embodiments embodied within the scope and equivalents of the features described in the appended claims.

[0081] The dimensions and values ​​disclosed herein should not be construed as strictly limited to the precise numerical values ​​stated. Rather, unless otherwise specified, each such dimension is intended to represent the value and a functionally equivalent range around that value. For example, a dimension disclosed as “40 mm” is intended to represent “approximately 40 mm”.

[0082] All documents referenced in the “Detailed Description” section are incorporated herein by reference in the relevant sections; no reference to any document should be construed as an admission that it is prior art concerning this utility model. In the event of any conflict between the meaning or definition of any term in this written document and the meaning or definition of any term in the referenced documents, the meaning or definition assigned to the term in this written document shall prevail.

[0083] While specific embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that many other changes and modifications can be made without departing from the spirit and scope of the present invention. Therefore, the appended claims are intended to cover all such changes and modifications within the scope of the present invention.

[0084] When describing elements of the present invention or their preferred embodiments(s), the articles “a,” “an,” “the,” and “the” are intended to indicate the presence of at least one element. The terms “comprising,” “including,” and “having” are intended to be inclusive and mean that additional elements may be present in addition to the listed elements. Many modifications and variations may be made to the present invention without departing from the spirit and scope thereof. Therefore, the above embodiments are not intended to limit the scope of the present invention.

Claims

1. A sports shoe with a centroid marking, the sports shoe comprising an outsole (40) and an upper (50) connected above the outsole (40), the outsole (40) having, in a longitudinal direction from back to front, a heel end (11), a heel area (10) corresponding to the back of the foot, a midfoot area (20) corresponding to the arch of the foot, and a forefoot area (30) corresponding to the front of the foot, characterized in that, The center of mass of the athletic shoe is located inside the outsole (40), wherein the longitudinal distance between the heel end (11) and the center of mass is approximately 58.1% to 70% of the total length of the athletic shoe.

2. The sports shoe according to claim 1, characterized in that, The horizontal distance between the heel tip (11) and the center of mass is approximately 60% to 65% of the total length of the athletic shoe.

3. The sports shoe according to claim 1 or 2, characterized in that The forefoot area (30) is fitted with an accessory (31) for increasing the weight of the forefoot area (30).

4. The sports shoe according to claim 3, characterized in that The accessory (31) is at least one of a carbon plate, a TPU block, a metal block, or a polymer material block.

5. The sports shoe according to any one of claims 1 to 3, wherein The heel region (10) has a hollow structure (12) that helps to reduce the weight of the heel region (10).

6. The athletic shoe according to any one of claims 1 to 3, characterized in that, The volume of the forefoot region (30) is greater than the volume of the heel region (10), and / or the density of the forefoot region (30) is greater than the density of the heel region (10).

7. The sports shoe according to any one of claims 1 to 3, wherein The midfoot region (20) has a hollow structure (12), and the volume of the forefoot region (30) is greater than the volume of the hindfoot region (10).

8. The sports shoe according to claim 1, wherein The side of the outsole (40) has a marking portion (41) for identifying the center of mass by a lateral projection.

9. The sports shoe according to claim 8, characterized in that The marking part (41) includes an intersecting line with the intersection of the projections along the vertical direction, the projections along the vertical direction passing through the intersection of the intersecting lines, or the marking part (41) includes a circle or a polygon, the projections along the horizontal direction passing through the center of the circle or the polygon.

10. The sports shoe according to claim 8 or 9, characterized in that The marking part (41) is designed to be formed on the outsole (40) by surface embossing, texturing, polishing, printing or hollowing out.

Images