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Gait Adaptations Under Functional Asymmetry: Exploring the Role of Step Width, Step Length, and CoM in Lateral
Summary
Functional asymmetry in walking increases step width to widen the base of support. However, this adaptation reduces lateral stability due to increased center of mass movement, impacting gait balance.
Area of Science:
- Biomechanics
- Gait Analysis
- Human Locomotion
Background:
- Bipedal gait requires intricate coordination of foot placement and center of mass (CoM) for balance.
- Functional asymmetry's specific impact on lateral gait stability remains under-explored.
- Understanding gait adaptations is crucial for rehabilitation strategies.
Purpose of the Study:
- To investigate the effects of induced functional asymmetry on lateral gait stability.
- To analyze adaptations in step length, step width, and CoM movement during walking with asymmetry.
Main Methods:
- Healthy young adults walked with and without a functional asymmetry (fully extended left knee).
- Measurements included step length, step width, and center of mass (CoM) movement.
- Gait stability was assessed under varying speeds.
Main Results:
- Step length was unaffected by functional asymmetry across different speeds.
- Step width increased significantly under the induced asymmetry, widening the base of support.
- Increased lateral CoM movement counteracted the wider base of support, reducing overall lateral stability.
Conclusions:
- Functional asymmetry alters gait by increasing step width, but this does not enhance lateral stability.
- The study highlights a trade-off between base of support and CoM control in maintaining gait balance.
- Findings provide insights into gait adaptation mechanisms and inform rehabilitation for individuals with gait asymmetry.
