Ko Chang-Yong, Chang Yunhee, Jeong Bora, Kang Sungjae, Ryu Jeicheong, Kim Gyoosuk
Research Team, Rehabilitation Engineering Research Institute, Incheon, Republic of Korea.
PeerJ. 2017 May 18;5:e3340. doi: 10.7717/peerj.3340. eCollection 2017.
The evaluation of multisegment coordination is important in gaining a better understanding of the gait and physical activities in humans. Therefore, this study aims to verify whether the use of knee sleeves affects the coordination of lower-limb segments during level walking and one-leg hopping. Eleven healthy male adults participated in this study. They were asked to walk 10 m on a level ground and perform one-leg hops with and without a knee sleeve. The segment angles and the response velocities of the thigh, shank, and foot were measured and calculated by using a motion analysis system. The phases between the segment angle and the velocity were then calculated. Moreover, the continuous relative phase (CRP) was calculated as the phase of the distal segment subtracted from the phase of the proximal segment and denoted as CRPTS (thigh-shank), CRPSF (shank-foot), and CRPTF (thigh-foot). The root mean square (RMS) values were used to evaluate the in-phase or out-of-phase states, while the standard deviation (SD) values were utilized to evaluate the variability in the stance and swing phases during level walking and in the preflight, flight, and landing phases during one-leg hopping. The walking velocity and the flight time improved when the knee sleeve was worn ( < 0.05). The segment angles of the thigh and shank also changed when the knee sleeve was worn during level walking and one-leg hopping. The RMS values of CRPTS and CRPSF in the stance phase and the RMS values of CRPSF in the preflight and landing phases changed ( < 0.05 in all cases). Moreover, the SD values of CRPTS in the landing phase and the SD values of CRPSF in the preflight and landing phases increased ( < 0.05 in all cases). These results indicated that wearing a knee sleeve caused changes in segment kinematics and coordination.
评估多节段协调性对于更好地理解人类步态和身体活动非常重要。因此，本研究旨在验证佩戴护膝是否会影响平地行走和单腿跳跃过程中下肢各节段的协调性。11名健康成年男性参与了本研究。他们被要求在平地上行走10米，并在佩戴和不佩戴护膝的情况下进行单腿跳跃。使用运动分析系统测量并计算大腿、小腿和足部的节段角度及响应速度。然后计算节段角度与速度之间的相位。此外，连续相对相位（CRP）通过近端节段的相位减去远端节段的相位来计算，并分别表示为CRPTS（大腿-小腿）、CRPSF（小腿-足部）和CRPTF（大腿-足部）。均方根（RMS）值用于评估同相或异相状态，而标准差（SD）值用于评估平地行走时站立和摆动阶段以及单腿跳跃时预飞行、飞行和着陆阶段的变异性。佩戴护膝时行走速度和飞行时间有所改善（<0.05）。在平地行走和单腿跳跃过程中佩戴护膝时，大腿和小腿的节段角度也发生了变化。站立阶段CRPTS和CRPSF的RMS值以及预飞行和着陆阶段CRPSF的RMS值发生了变化（所有情况均<0.05）。此外，着陆阶段CRPTS的SD值以及预飞行和着陆阶段CRPSF的SD值增加（所有情况均<0.05）。这些结果表明，佩戴护膝会导致节段运动学和协调性发生变化。
