Ohji Shunsuke, Aizawa Junya, Hirohata Kenji, Ohmi Takehiro, Kawasaki Tomoko, Koga Hideyuki, Yagishita Kazuyoshi
Clinical Center for Sports Medicine and Sports Dentistry, Institute of Science Tokyo, Tokyo, JPN.
Department of Physical Therapy, Juntendo University, Tokyo, JPN.
Cureus. 2025 Mar 4;17(3):e80051. doi: 10.7759/cureus.80051. eCollection 2025 Mar.
Objective Compared to healthy athletes, athletes who have undergone anterior cruciate ligament (ACL) reconstruction have been shown to have delayed reaction time (RT). However, the reliability of RT measurements after ACL reconstruction remains unknown, and no study has measured RT after ACL reconstruction in the single-leg standing position. This study aimed to validate the reliability of simple RT measurement in a single-leg standing position within a single session after ACL reconstruction. Materials and methods Participants who underwent ACL reconstruction were recruited for this study. A response-measuring instrument synchronized with a mat sensor measured simple RT in the single-leg standing position. The participant assumed the single-leg standing position on the mat sensor and lifted the sole off the mat sensor as soon as possible after the lamp lighting. The RT was defined as the time from the lamp lighting to when the sole left the mat sensor. The RT of each operative and nonoperative side was measured 10 times randomly. After confirming the normality of the data, the frequency effect on the 10 trials was confirmed by repeated measures analysis of variance. Results The mean of 10 RT trials in the single-leg standing position was 0.444 ± 0.072 s on the operative side and 0.436 ± 0.060 s on the nonoperative side. Repeated measures analysis of variance showed no significant difference between measurements for either the operative or nonoperative side. After the second trial, the intraclass correlation coefficient exceeded 0.900 for both the operative and nonoperative sides. The standard error of each measurement for the three trials was 0.006 s and 0.041 s for the operative and nonoperative sides, respectively. Conclusion The reliability of measurement within a single session of simple RT in the single-leg standing position after ACL reconstruction was acceptable.
目的 与健康运动员相比，前交叉韧带（ACL）重建后的运动员反应时间（RT）延迟。然而，ACL重建后RT测量的可靠性仍然未知，且尚无研究测量ACL重建后单腿站立位的RT。本研究旨在验证ACL重建后单次测量单腿站立位简单RT的可靠性。 材料与方法 招募接受ACL重建的参与者进行本研究。使用与垫子传感器同步的反应测量仪器测量单腿站立位的简单RT。参与者站在垫子传感器上呈单腿站立位，灯亮起后尽快抬起脚底离开垫子传感器。RT定义为从灯亮到脚底离开垫子传感器的时间。对每侧手术侧和非手术侧的RT随机测量10次。在确认数据呈正态分布后，通过重复测量方差分析确认10次试验的频率效应。 结果 单腿站立位10次RT试验的平均值，手术侧为0.444±0.072秒，非手术侧为0.436±0.060秒。重复测量方差分析显示，手术侧和非手术侧测量值之间无显著差异。第二次试验后，手术侧和非手术侧的组内相关系数均超过0.900。三次试验中，手术侧和非手术侧每次测量的标准误差分别为0.006秒和0.041秒。 结论 ACL重建后单次测量单腿站立位简单RT的可靠性是可接受的。
