Elastic Strap Running Form Aid for Arm Alignment
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Solution Overview
Problem
Runners often adopt inefficient running forms, with arms crossing the body and elbows extended beyond 90 degrees, leading to inefficient arm movements, and failure to enter the dorsiflexion position, resulting in suboptimal leg movements and reduced speed.
Innovation Solution
A running form aid system comprising a waist belt, arm bindings, and elastic straps to maintain arms at a 90-degree angle and shoe attachments to encourage the dorsiflexion position, guiding runners into proper arm and leg alignment through resistance and alignment assistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If runners allow arms to move freely without constraint, then ease of operation is improved, but arm alignment deteriorates (arms cross body or elbows extend beyond 90 degrees)
Solution Approach 1:
Elastic straps serve as intermediary elements between the runner's hands and the binding system, providing gentle guidance to maintain proper arm alignment without rigid constraint. The straps transmit alignment guidance while allowing natural movement freedom.
Solution Approach 2:
The elastic straps dynamically adjust their tension based on arm position, providing resistance when arms deviate from the 90-degree elbow position and allowing freedom when properly aligned. This dynamic parameter change guides alignment without constant constraint.
2Shape
If elastic straps are used to maintain arm alignment, then arm alignment is improved, but device complexity increases
Solution Approach 1:
The binding system is divided into separate left and right bindings, each with its own elastic strap, allowing independent adjustment and guidance of each arm. This segmentation simplifies the overall design by breaking down the complex alignment task into manageable independent units.
Solution Approach 2:
The binding and elastic strap assembly serves multiple functions: it guides arm alignment, provides tactile feedback, and allows natural movement. This multi-functionality reduces the need for additional separate devices, thereby limiting the increase in device complexity.
3Ease of operation
If runners do not use dorsiflexion position, then ease of operation is improved, but running efficiency deteriorates (longer leg swing and lost speed)
Solution Approach 1:
The elastic strap attached to the shoe acts as an intermediary that provides tactile feedback and gentle guidance to encourage dorsiflexion. It creates a mechanical connection that rewards proper foot positioning with reduced resistance and penalizes incorrect positioning with increased resistance.
Solution Approach 2:
The elastic strap's tension changes dynamically based on foot position, providing resistance when the foot is in plantar flexion and allowing natural movement when dorsiflexed. This parameter change guides the runner toward the more efficient dorsiflexion position without rigid constraint.
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
The system effectively trains runners to maintain proper arm and leg alignment, enhancing running efficiency by preventing arm crossing and promoting a shorter, more efficient pendulum swing, thereby improving speed and reducing the risk of injury.
Implementation Method 1
A left elastic strap is attached to the left binding and a right elastic strap is attached to the right binding for engagement by the left hand and the right hand of the runner respectively to maintain the arms at an approximate 90 degree angle
Data Source
AI summary
A running form aid system for efficiently teaching a runner the proper running form. The running form aid system generally includes a waist belt attachable about a waist of the runner, a left binding attachable about a left arm of the runner, a left connector attached between a left side of the waist belt and the left binding, a right binding attachable about a right arm of the runner, and a right connector attached between a right side of the waist belt and the right binding. A left elastic strap is attached to the left binding and a right elastic strap is attached to the right binding for engagement by the left hand and the right hand of the runner respectively to maintain the arms at an approximate 90 degree angle.