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Updated: Jul 25, 2025
08:24
Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb
Published on: August 30, 2016
10.3K
A novel Dynamic Body Weight Support overground co-walker enabling variable unloading ratio and Motion Tracking.
Xiaoqian Zhang1,2, Peng Shang1, Bing Li3
1Center of Neuroengineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.
Frontiers in Neuroscience
|June 26, 2023
Summary
This study introduces a novel Motion Tracking Variable Body Weight Support (MTVBWS) system for gait training. The MTVBWS system enhances natural walking by reducing horizontal drag and minimizing lower limb force fluctuations during rehabilitation.
Area of Science:
- Rehabilitation Engineering
- Biomechanics
- Robotics
Background:
- Dynamic Body Weight Support (BWS) systems are crucial for gait training.
- Existing systems often neglect natural gait mechanics and omnidirectional movement.
- Previous work developed a Motion Tracking (MT) walker, leading to this new system.
Purpose of the Study:
- To introduce a novel Motion Tracking Variable Body Weight Support (MTVBWS) system.
- To enable dynamic vertical and horizontal body weight support during overground walking.
- To improve natural gait and reduce lower limb impact in rehabilitation.
Main Methods:
- Utilized Center of Mass (COM) tracking and gait phase detection.
- Integrated active Mecanum wheels for omnidirectional horizontal movement guided by COM recognition.
- Conducted validation experiments comparing MT, passive, and MTVBWS modes under static, fixed unloading ratio (FUR), and variable unloading ratio (VUR) settings (20-30% unloading force).
Main Results:
- The MTVBWS mode significantly reduced the horizontal dragging effect compared to other modes.
- The system automatically adjusted unloading force to minimize lower limb force fluctuations.
- Compared to natural walking, the MTVBWS mode demonstrated smaller force fluctuations in each lower limb.
Conclusions:
- The novel MTVBWS system effectively supports body weight dynamically in both vertical and horizontal planes.
- This system facilitates more natural gait patterns and reduces impact during rehabilitation.
- The MTVBWS system shows promise for enhancing gait training and recovery outcomes.
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