Wheelchair Accessible Exercise System Using Hydraulic Resistance
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Solution Overview
Problem
Individuals with spinal cord injuries and mobility challenges face barriers to exercise due to concerns about exacerbating spasticity and contractures, and existing fitness equipment is not accessible or safe for wheelchair-bound users, leading to reduced physical activity and associated health issues.
Innovation Solution
A wheelchair-accessible exercise system that allows users to perform strength and cardiovascular exercises without repositioning their wheelchair, utilizing hydraulic cylinders for adjustable resistance and a design that accommodates users with limited mobility, including features like grip assistance for those with grip strength impairments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional weight stacks are used for resistance training, then resistance can be provided, but the system becomes hazardous for users with limited mobility and grip strength
Solution Approach 1:
The patent replaces traditional mechanical weight stacks with hydraulic cylinders to provide resistance. The hydraulic system uses fluid pressure to generate controllable resistance forces, eliminating the need for users to manually handle heavy weights. This provides safe, adjustable resistance that can be precisely controlled through hydraulic valves, making the system suitable for users with limited mobility and grip strength while maintaining reliability and reducing injury risk.
2Adaptability or versatility
If fitness equipment is designed for able-bodied users, then comprehensive exercise coverage is achieved, but the equipment becomes inaccessible to wheelchair-bound users
Solution Approach 1:
The patent designs a multi-functional exercise system that can accommodate users in wheelchairs while providing comprehensive exercise coverage. The system includes multiple exercise stations (seated row, chest press, leg press, etc.) that can all be accessed from a seated position. The hydraulic resistance mechanism and adjustable seat positions allow the same equipment to serve both able-bodied users and wheelchair-bound users, achieving universality without compromising exercise comprehensiveness or accessibility.
3Adaptability or versatility
If users must reposition their wheelchair to access different exercises, then exercise variety is achieved, but the operation becomes cumbersome and time-consuming
Solution Approach 1:
The patent combines multiple exercise functions into a single integrated station where users can perform various exercises (row, chest press, leg press, etc.) without leaving their seated position. The hydraulic cylinders are arranged to provide resistance for multiple movement patterns simultaneously, and the seat can be adjusted to accommodate different exercise types. This merging of functions allows users to transition between exercises by simply adjusting their posture or the machine settings rather than physically repositioning their wheelchair, maintaining exercise variety while greatly simplifying operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables comprehensive and safe workouts for wheelchair-bound individuals, preventing health issues like heart disease and muscle spasms, and promoting overall physical conditioning without the need for cumbersome repositioning or use of potentially hazardous weight stacks.
Implementation Method 1
the exercise system may use hydraulic cylinders, which do not store potential energy, like a vertically displaced weight, and offer varying resistances
Data Source
AI summary
Various systems, processes, and techniques may be used to achieve a wheelchair-accessible exercise system. In particular implementations, a wheelchair-accessible exercise system may allow a user to perform strength and cardiovascular exercises without having to reposition his/her wheelchair. For example, a user may perform seven different exercises without moving his/her chair, or possibly even the trunk of their body. Thus, the exercise system may provide a comprehensive workout without requiring repositioning of the wheelchair, which can be quite cumbersome to those that are mobility challenged. Moreover, the exercise system may be adjustable and safe.