Karner Lukas, Schreff Lucas, Abel Rainer, Müller Roy
Bayreuth Center of Sport Science, University of Bayreuth, 95447 Bayreuth, Germany.
Department of Orthopedic Surgery, Klinikum Bayreuth GmbH, 95445 Bayreuth, Germany.
Sensors (Basel). 2025 Jul 29;25(15):4676. doi: 10.3390/s25154676.
Manual wheelchair propulsion is often associated with pain in the upper extremities. Recording spatio-temporal parameters can optimize movement patterns and prevent injuries. This study compares a marker-based camera system with inertial measurement units to validate their use in wheelchair propulsion on a test stand.
Spatio-temporal parameters of 27 manual wheelchair users propelling at three self-selected speeds (slow, normal, fast) were simultaneously recorded using a marker-based camera system and inertial measurement units, and subsequently compared between both systems.
A high correlation was observed among all spatio-temporal parameters ( > 0.992). The biases for the start time of hand contact with the pushrim (-0.02 ± 0.02 s), hand release from the pushrim (-0.02 ± 0.01 s), and push length (-0.45 ± 21.45 ms) were slightly overestimated, while recovery length (0.54 ± 21.02 ms), cycle speed (2.37 ± 2.67°/s), and push angle (1.75 ± 4.14°) were slightly underestimated. No bias was found for propulsion frequency.
The spatio-temporal parameters recorded using inertial measurement units are suitable for the evaluation of manual wheelchair propulsion and can be used in a clinical context. The low acquisition costs and simple installation process may increase the use of inertial measurement units in the future.
手动轮椅推进通常与上肢疼痛相关。记录时空参数可优化运动模式并预防损伤。本研究比较了基于标记的摄像系统和惯性测量单元，以验证它们在试验台上用于轮椅推进的情况。
使用基于标记的摄像系统和惯性测量单元同时记录27名手动轮椅使用者以三种自我选择的速度（慢、正常、快）推进时的时空参数，随后对两个系统的参数进行比较。
在所有时空参数之间观察到高度相关性（>0.992）。手接触轮辋的起始时间（-0.02±0.02秒）、手离开轮辋的时间（-0.02±0.０1秒）和推程长度（-0.45±21.45毫秒）的偏差被略微高估，而恢复长度（0.54±21.02毫秒）、周期速度（2.37±2.67°/秒）和推角（1.75±4.14°）被略微低估。推进频率未发现偏差。
使用惯性测量单元记录的时空参数适用于评估手动轮椅推进，并且可用于临床环境。低采集成本和简单的安装过程可能会增加未来惯性测量单元的使用。
