Abstract
Different handrail heights and initial foot angles are crucial to the performance of the STS movement. However, to the best of our knowledge, the effects of changing the toe orientation at different handrail heights on lower limb kinematics and dynamics have not yet been investigated. The purpose of this study was to investigate the comprehensive effects of different handrail heights on both sides and different initial foot angles on the kinematics and kinetics of healthy adults during the sit-to-stand movement. This study recruited 16 healthy young individuals, including 8 men and 8 women. The test was performed under seven conditions. The percent of movement time in each phase, the variation range of each joint angle of lower limb, and the joint moment of lower limb were analyzed and compared. There was an interaction between the handrail height and initial foot angle in relation to the percent of movement time in the fourth phase (P = 0.012). The initial foot angle had a significant effect on the variation range of the ankle joint angle (P = 0.016). The handrail height had a significant effect on the variation range of the hip joint angle (P = 0.019). During the sit-to-stand movement, individuals are able to stand and balance more rapidly under toe-middle under a high handrail than under other conditions. Toe-in under a high handrail may be more appropriate for patients with ankle joint injuries. High handrails should be preferred for those whose trunk cannot tilt forward sufficiently when leaving their seat.
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The authors thank The Tianjin Natural Science Foundation (19JCZDJC33200).
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This study was funded by The Tianjin Natural Science Foundation (19JCZDJC33200).
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Conceptualization: MJ, QX, SY, ZLv, KQ. Formal analysis: MJ. Methodology: MJ, QX. Supervision: QX. Visualization: ZL, KQ.
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Jiao, M., Xue, Q., Yang, S. et al. Effects of different handrail heights and initial foot angles on kinematics and kinetics in healthy adults during the sit-to-stand movement. Int J Intell Robot Appl 7, 335–349 (2023). https://doi.org/10.1007/s41315-023-00280-4
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DOI: https://doi.org/10.1007/s41315-023-00280-4