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Walking With a Robotic Exoskeleton Does Not Mimic Natural Gait: A Within-Subjects Study
Chad Swank1, Sharon Wang-Price1, Fan Gao2
1Texas Woman's University, Dallas, TX, United States.
JMIR Rehabilitation and Assistive Technologies
|July 26, 2019
Summary
Wearing a robotic exoskeleton (EKSO) significantly alters temporospatial gait parameters, lower extremity kinematics, and muscle activity in healthy adults. This suggests EKSO promotes a distinct gait pattern compared to normal walking.
Area of Science:
- Biomechanics
- Robotics
- Human Movement Analysis
Background:
- Robotic exoskeletons aid individuals with lower extremity weakness in standing and walking.
- Limited data exists on how these devices impact gait characteristics.
Purpose of the Study:
- To investigate the effects of wearing a robotic exoskeleton on temporospatial gait parameters.
- To analyze changes in kinematics and muscle activity during gait with exoskeleton use.
Main Methods:
- 15 healthy adults participated in walking trials with and without a robotic exoskeleton (EKSO).
- A 10-camera motion analysis system, 6 force plates, and EMG system captured gait data.
- Temporospatial, kinematic, and muscle activity data were analyzed for 5 trials per condition.
Main Results:
- Exoskeleton use altered gait speed, stride length, and double-limb support time.
- Hip and ankle range of motion decreased, while knee range of motion increased during stance.
- EMG activity decreased in lower extremity muscles during stance and in specific distal muscles during swing.
Conclusions:
- Robotic exoskeleton use modifies gait parameters, kinematics, and muscle activation in healthy adults.
- First-time exoskeleton users exhibit a gait pattern different from normal walking.
- Further research is required to understand the implications for gait training in individuals with impairments.
Keywords:
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