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Backward walking: a simple reversal of forward walking?
D A Winter1, N Pluck, J F Yang
1Department of Kinesiology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada.
Journal of Motor Behavior
|September 1, 1989
Summary
Backward walking is not a simple temporal reversal of forward walking. Muscle activation patterns are similar, but muscle contraction timing (concentric vs. eccentric) is reversed for locomotion.
Area of Science:
- Biomechanics
- Neuroscience
- Human Locomotion
Background:
- Forward and backward walking are fundamental human movements.
- Understanding the neural control of locomotion is crucial for rehabilitation and robotics.
Purpose of the Study:
- To investigate if backward walking is a temporal reversal of forward walking.
- To determine if the same neural circuits control both walking directions.
Main Methods:
- Compared electromyographic (EMG) signals, joint angles, moments, and muscle power during forward and backward walking in 6 subjects.
- Analyzed kinematic and kinetic data to assess similarities and differences.
Main Results:
- Joint angle patterns were similar, except at the ankle.
- Joint moment patterns showed similarity, with an exception at the knee.
- Joint muscle powers were nearly reversed in polarity between forward and backward walking.
- EMG results generally supported reversed temporal cycling of muscle activity.
Conclusions:
- Backward walking involves reversed temporal sequencing of muscle contractions (concentric vs. eccentric).
- Locomotion modes share similar muscle activation but differ in timing, suggesting distinct neural control elements.
- The neural control for backward walking is not a simple time-reversal of forward walking.