Calf Stretching Wedge for Dorsiflexed Varus Gastrocnemius Targeting
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Solution Overview
Problem
Existing orthotics for hypermobile ankles exacerbate calf tightness, making it difficult to go barefoot or without support, and conventional calf stretching exercises fail to effectively target the lateral neuromuscular aspect of the calf muscles, particularly the gastrocnemius, leading to instability and reduced flexibility.
Innovation Solution
A physical therapy calf stretching device with inclined, laterally sloping standing surfaces forming an intersection angle greater than 180°, designed to position the feet in a dorsiflexed varus stance, targeting the gastrocnemius muscles through a dorsiflexed varus stance exercise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heel raising orthotics are used to treat hypermobile midfoot, then heel contact with the ground is increased, but calf muscles become tighter and range of motion is reduced
Solution Approach 1:
Instead of using orthotics to limit pronation and raise the heel (conventional approach), this invention inverts the approach by using a heel wedge that encourages dorsiflexion and allows the heel to lower toward the ground. The wedge shape with its specific angle (5-15 degrees) reverses the traditional orthotic function, transforming the heel-raising problem into a heel-lowering solution that simultaneously stretches the calf muscles.
Solution Approach 2:
The invention changes the angular parameter of the heel wedge (5-15 degrees) to optimize the balance between achieving sufficient dorsiflexion for calf stretching and maintaining comfortable wearability. This parameter adjustment allows the device to effectively stretch the calf muscles while remaining comfortable for prolonged use, addressing both the flexibility improvement and ease of operation concerns.
2Ease of operation
If conventional calf stretching exercises are used, then general calf flexibility is improved, but the lateral neuromuscular aspect of the gastrocnemius muscles is not effectively targeted
Solution Approach 1:
The heel wedge is designed with asymmetric local qualities: one side provides the wedged surface for dorsiflexion while the other side is adapted to fit against the lateral aspect of the heel and calf. This localized design feature ensures that the stretching force is concentrated on the lateral gastrocnemius muscles, improving targeting accuracy without compromising overall calf flexibility.
Solution Approach 2:
The heel wedge exhibits asymmetric geometry with different angles and surface characteristics on each side. The wedged side (5-15 degrees) targets dorsiflexion while the contoured side adapts to the lateral calf anatomy. This asymmetry enables precise targeting of the lateral gastrocnemius muscles, distinguishing it from symmetric conventional stretching devices.
3Reliability
If orthotics are worn continuously to maintain ankle stability, then joint stability is improved, but barefoot comfort and natural movement are compromised
Solution Approach 1:
The heel wedge is designed to be worn without orthotic support structures, allowing users to experience barefoot-like comfort while still receiving the therapeutic benefits of controlled dorsiflexion. The simple wedge geometry provides stability and stretching benefits without the complexity of traditional orthotics, enabling natural movement patterns to be maintained.
Solution Approach 2:
The invention extracts the essential therapeutic function (controlled heel positioning for calf stretching) from the complex orthotic system. By removing unnecessary orthotic components and retaining only the critical wedge function, the device achieves ankle stability and calf flexibility improvement while maintaining barefoot comfort and natural adaptability.
Data Source
AI summary
A physical therapy calf stretching exercise device has two adjacent standing surfaces. These surfaces are inclined at an angle to the ground plane and slope laterally. creating an intersection angle of more than 180°. The exercise involves standing on the device with each foot on a standing surface, which positions the feet in a dorsiflexed varus stance. This stance specifically targets the lateral neuromuscular aspect of the calf. particularly the gastrocnemius muscles that are challenging to isolate with conventional calf stretching exercises. The goal is to enhance the range of motion and flexibility of the lateral calf and nerves.