Abstract
Purpose
Sit-to-stand (STS) is a basic skill for maintaining a high-quality life. The purpose of this study was to examine the effect of handrail height on the peak moment of the lower extremity joint under the support of the knee joint in ST and to provide quantified kinematics and kinetics data to help determine the STS movement strategy under the optimal handrail height. This research could also provide a starting point for the design and control of STS assistive devices.
Methods
Thirty healthy young adult subjects participated in this experiment. They grabbed handrails of different heights to perform STS at a speed of their choice. Kinematics data from the marker points at the subject’s joints were obtained through a high-definition camera, and the reaction forces at the foot, hip, and knee were measured through force-measuring devices. The inverse kinetics method was used to calculate the moment of the subject’s lower limb joints. Finally, kinematics data and kinetic data were analyzed and compared.
Results and conclusions
The peak moments of the knee joint and hip joint at different handrail heights were significantly different (P = 0.005, P < 0.001). As the handrail height increased, the peak moments of the knee joint and hip joint decreased and the maximum trunk tilt angle also decreased significantly (P < 0.001). These findings indicated that the use of a combination of knee joint support and high handrails could make STS movement easier.
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Data availability
The datasets used and/or analyzed for the current study are available from the corresponding author on reasonable request.
Code availability
Not applicable.
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Acknowledgements
The authors thank The Tian** Natural Science Foundation (19JCZDJC33200), Tian** Natural Science Foundation (18JCQNJC75300).
Funding
This study has been funded by The Tian** Natural Science Foundation (19JCZDJC33200), Tian** Natural Science Foundation (18JCQNJC75300).
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Contributions
Conceptualization: Min Li, Qiang Xue, Shuo Yang, **aolong Han, Shouwei Zhang.
Formal analysis: Min Li
Methodology: Min Li, Qiang Xue
Supervision: Qiang Xue
Visualization: **aolong Han, Shouwei Zhang
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This study was approved by the Academic Ethics and Scientific Ethics Committee of the Academic Committee of Tian** University of Science and Technology.
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Li, M., Xue, Q., Yang, S. et al. Effects analysis of handrail height on sit-to-stand movement under knee joint support in healthy young adults. Res. Biomed. Eng. 38, 617–628 (2022). https://doi.org/10.1007/s42600-022-00212-4
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DOI: https://doi.org/10.1007/s42600-022-00212-4