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Medium term comparison of shock attenuating insoles using a spectral analysis technique
1Orthotics and Disability Research Centre, Derbyshire Royal Infirmary, Derby, UK.
Journal of Biomedical Engineering
|October 1, 1988
Summary
This study tested four orthotic insoles for shock absorption during walking. Viscolas and Gait Aid maintained performance, while PPT and Plastazote degraded, with Viscolas showing superior shock absorption.
Area of Science:
- Biomechanics
- Orthotics and Prosthetics
- Sports Medicine
Background:
- Skeletal shock can cause significant damage.
- Reliable measurement of shock transients during gait is crucial.
- Orthotic insoles are commonly used to mitigate impact forces.
Purpose of the Study:
- To evaluate the reliability of a new device for measuring shock transients during gait.
- To assess the shock absorption properties and durability of four different orthotic insoles.
- To compare the performance of Viscolas, PPT, Plastazote, and Gait Aid insoles over time.
Main Methods:
- Utilized the J.P. Biomechanics Shock Meter to measure shock transients.
- Tested four types of orthotic insoles (Viscolas, PPT, Plastazote, Gait Aid).
- Subjects walked on a timed oval course for 1 month, with measurements taken at intervals.
Main Results:
- Viscolas and Gait Aid showed no significant deterioration in shock absorption properties.
- PPT and Plastazote insoles demonstrated degradation in performance over the 1-month period.
- Viscolas exhibited superior shock absorption compared to all other tested insoles.
Conclusions:
- Viscolas and Gait Aid are recommended for their durability and shock absorption.
- Manufacturers should provide data on the long-term effects of use on insole properties.
- Understanding insole performance over time is critical for user benefit and injury prevention.