Rotating Forearm Holder for Constant-Angle Resistance Training
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional resistance training devices, such as barbells and dumbbells, apply resistance inefficiently, leading to increased injury risk and reduced exercise efficacy, as resistance is highest when joints are most vulnerable and lowest when greater load is beneficial for muscle contraction.
Innovation Solution
A resistance training exercise device with a frame and holder system that rotates with the user's forearm, maintaining a constant angle difference between the upper arm and weight support, synchronizing resistance with muscle contraction, thereby reducing injury risk and enhancing exercise effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional resistance training devices (barbells and dumbbells) are used, then the exercise can be performed with simple equipment, but resistance is applied inefficiently causing high injury risk when joints are vulnerable and low effectiveness when muscle contraction needs greater load
Solution Approach 1:
The device employs a dynamic resistance mechanism where the weight support moves in coordination with the user's arm movement. The holder rotates with the forearm about the elbow, and the weight support is positioned to maintain a constant angle difference between the upper arm and lever channel throughout the exercise range. This dynamic configuration ensures resistance is applied optimally at each phase of motion, providing greater load during muscle contraction and reduced load during extension, thereby simultaneously improving exercise effectiveness and reducing injury risk.
2Productivity
If conventional fixed-position weight devices are used, then device structure is simple, but resistance application is inefficient reducing exercise benefits
Solution Approach 1:
The device transforms the static weight support into a dynamic component that moves with the user's arm. The holder is coupled to rotate with the forearm about the elbow, and the weight support is spaced from the holder in a direction that maintains a constant angle difference throughout the exercise. This dynamic arrangement allows the resistance to be applied efficiently at all phases of motion without requiring complex mechanical systems, achieving improved exercise effectiveness with moderate structural complexity.
Data Source
AI summary
The present disclosure relates to a resistance training exercise device that includes a frame; a holder coupled to the frame, the holder defining a lever channel for receiving a forearm of a user; the holder and the frame configured to rotate with the forearm about an elbow relative to an upper arm when the user is performing a rotary resistance training exercise; and a weight support for receiving one or more weights thereon, the weight support fixed to the frame and spaced apart from the holder in a direction selected to maintain, throughout the resistance exercise, an angle between the upper arm and the weight support that is greater by a constant value than an angle between the upper arm and the lever channel.