Jin Zhixin, Shi Jingnan, Zhang Haohua, Zhou Xinglong, Zhang Kuan, Yan Songhua
Beijing Sport University, Beijing 100084, China.
School of Biomedical Engineering, Capital Medical University, Beijing 100069, China.
Appl Bionics Biomech. 2025 Jul 3;2025:8851877. doi: 10.1155/abb/8851877. eCollection 2025.
Force sense reflects the efferent activity capacity of proprioception. Currently, methods for measuring force sense in the knee joint is lack. This study aims to validate a constructed test system and to explore the characteristics of force sense in patients with knee osteoarthritis (KOA). Seventy-five subjects were recruited: 30 for verifying the reliability of test system and exploring the impact of body mass index (BMI) and the striking force on force sense; 20 healthy adults and 25 KOA patients for the method application. The force sense test system comprised a self-designed force application apparatus and a wireless surface electromyography (sEMG) device (DELSYS Inc, USA). The reflex contraction latency of muscles was considered as the force sense. The intraclass correlation coefficient (ICC) was used to verify the reliability. The reflex contraction latencies of biceps femoris (BF) was the shortest and ICC in the two tests is 0.950 ( < 0.001). No significant differences in force sense were found between different BMI groups (=0.065), and there was no notable interaction between BMI and striking force (=0.283). A significant difference in force sense was observed between different striking forces ( < 0.001). There were no significant differences in force sense of bilateral sides between healthy people and KOA patients (=0.126, =0.315). The force sense testing method established in this study is applicable for measuring knee joint force sense. BMI did not affect knee joint force sense but striking force did, and subjects with different BMI chose the same striking force; KOA did not influence the force sense of knee joint.
力觉反映本体感觉的传出活动能力。目前，缺乏测量膝关节力觉的方法。本研究旨在验证构建的测试系统，并探索膝骨关节炎（KOA）患者的力觉特征。招募了75名受试者：30名用于验证测试系统的可靠性并探索体重指数（BMI）和打击力对力觉的影响；20名健康成年人和25名KOA患者用于方法应用。力觉测试系统包括自行设计的力施加装置和无线表面肌电图（sEMG）设备（美国DELSYS公司）。肌肉的反射收缩潜伏期被视为力觉。使用组内相关系数（ICC）来验证可靠性。股二头肌（BF）的反射收缩潜伏期最短，两次测试中的ICC为0.950（<0.001）。不同BMI组之间在力觉上未发现显著差异（=0.065），BMI与打击力之间也没有显著的相互作用（=0.283）。在不同打击力之间观察到力觉有显著差异（<0.001）。健康人与KOA患者双侧的力觉没有显著差异（=0.126，=0.315）。本研究建立的力觉测试方法适用于测量膝关节力觉。BMI不影响膝关节力觉，但打击力会影响，且不同BMI的受试者选择相同的打击力；KOA不影响膝关节力觉。
