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Updated: May 29, 2026
08:19
Asymmetric Walkway: A Novel Behavioral Assay for Studying Asymmetric Locomotion
Published on: January 15, 2016
Kinematic strategies for walking across a destabilizing rock surface
Deanna H Gates1, Jason M Wilken, Shawn J Scott
1Department of Orthopedics and Rehabilitation, Center for the Intrepid, Ft. Sam Houston, TX 78234, USA.
Gait & Posture
|September 6, 2011
Summary
Healthy adults adapt gait on unstable surfaces by increasing joint movement, leading to greater minimum toe clearance (MTC) and a lower center of mass (COM(VT)). This improves stability on challenging terrain.
Area of Science:
- Biomechanics
- Human locomotion
- Motor adaptation
Background:
- Understanding gait adaptation is crucial for real-world mobility.
- Variable surface conditions pose challenges to stable walking.
- Previous research has not fully detailed kinematic adjustments on destabilizing surfaces.
Purpose of the Study:
- To quantify lower-extremity joint kinematics during walking on level ground versus a loose rock surface.
- To estimate changes in whole body center of mass height (COM(VT)) and minimum toe clearance (MTC).
- To investigate the effects of walking speed on these adaptations.
Main Methods:
- 15 healthy young adults walked on level ground and a loose rock surface at four controlled speeds.
- Lower-extremity joint kinematics were measured using motion capture.
- Whole body center of mass height (COM(VT)) and minimum toe clearance (MTC) were calculated.
Main Results:
- Step parameter variability doubled on the loose rock surface compared to level ground.
- Increased hip and knee flexion, and flatter foot contact occurred on the loose rock surface, lowering COM(VT).
- Minimum toe clearance (MTC) increased 3.8 times on the loose rock surface due to greater hip, knee, and ankle dorsiflexion during swing.
Conclusions:
- Subjects systematically adapted gait kinematics to navigate the destabilizing loose rock surface.
- Increased joint flexion and dorsiflexion are key strategies for maintaining stability and clearance.
- Adaptations were influenced by walking speed, enhancing stability and clearance further.
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