Liu Hao, Shen Ying, Xiong Yuan, Zhou Hongfei, Mao Yuchen, Shen Qiangqiang, Hong Wenxia, Liu Mingjian, Liu Yanqian, Qiu Li, Zhang Zhijie, Jia Yanbing
Rehabilitation Department, JORU Rehabilitation Hospital, Yixing, China.
Rehabilitation Medicine Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
Front Physiol. 2022 Jun 15;13:911240. doi: 10.3389/fphys.2022.911240. eCollection 2022.
To examine the psychometric properties of four common hamstring muscle flexibility tests involving the straight leg raise (SLR), passive knee extension (PKE), sit and reach test (SRT) and toe touch test (TTT) in young adults. Forty-three young healthy adults (mean age 27.4 years) were recruited for 3 repeated sessions of hamstring flexibility assessments using the 4 tests mentioned above and the subsequent isokinetic examinations. The first two sessions (S1 and S2) were conducted by two different raters randomly on the first day (D1), and the third session (S3) was conducted by the same rater as S1 3 days later (D4). The next day (D5), the isokinetic performances of knee extensors and flexors of the dominant leg were assessed. To evaluate the interrater (S1 . S2) and test-retest (S1 . S3) reliability of hamstring flexibility tests, intraclass correlation coefficients (ICCs), standard errors of measurement, and the minimum detectable differences were calculated. Correlation analyses were performed to study the association of each hamstring flexibility test with the isokinetic muscle function of the knee flexors (H) and extensors (Q), including the peak torque (PT), total amount of work (TW) and average power (AP). Excellent interrater and test-retest reliability of hamstring flexibility tests involving the SLR, PKE, SRT and TTT were confirmed with ICCs ranging from 0.923 to 0.986. Fair correlations were found between the 4 hamstring flexibility tests and the H/Q for the PT at angular speeds of 180°/s (Pearson's r at 0.330-0.449). In addition, the PKE was fairly correlated with the AP of the hamstring (Pearson's r = 0.320) and the H/Q for the TW (Pearson's r = 0.345) and AP (Pearson's r = 0.386) at angular speeds of 180°/s. This study confirmed that the SLR, PKE, SRT and TTT were reliable flexibility tests for hamstring muscles in young healthy adults, and the PKE might be a more valid outcome measure to predict hamstring injury.
为了检验四种常见的腘绳肌柔韧性测试（包括直腿抬高试验（SLR）、被动膝关节伸展试验（PKE）、坐位体前屈试验（SRT）和触摸脚趾试验（TTT））在年轻成年人中的心理测量特性。招募了43名年轻健康成年人（平均年龄27.4岁），使用上述4种测试方法及随后的等速运动测试，进行3次重复的腘绳肌柔韧性评估。前两次测试（S1和S2）由两名不同的评估者在第一天（D1）随机进行，第三次测试（S3）由与S1相同的评估者在3天后（D4）进行。第二天（D5），评估优势腿膝关节伸肌和屈肌的等速运动表现。为了评估腘绳肌柔韧性测试的评估者间（S1.S2）和重测（S1.S3）信度，计算了组内相关系数（ICC）、测量标准误差和最小可检测差异。进行相关性分析，以研究每种腘绳肌柔韧性测试与膝关节屈肌（H）和伸肌（Q）的等速肌肉功能之间的关联，包括峰值扭矩（PT）、总功量（TW）和平均功率（AP）。涉及SLR、PKE、SRT和TTT的腘绳肌柔韧性测试具有出色的评估者间和重测信度，ICC范围为0.923至0.986。在180°/s角速度下，4种腘绳肌柔韧性测试与PT的H/Q之间存在中等程度的相关性（Pearson相关系数r为0.330 - 0.449）。此外，在180°/s角速度下，PKE与腘绳肌的AP（Pearson相关系数r = 0.320）以及TW的H/Q（Pearson相关系数r = 0.345）和AP（Pearson相关系数r = 0.386）存在中等程度的相关性。本研究证实，SLR、PKE、SRT和TTT是年轻健康成年人腘绳肌可靠的柔韧性测试，并且PKE可能是预测腘绳肌损伤更有效的结果指标。
