ABSTRACT

Many professionals use the handheld dynamometers (HHDs) to assess isometric strength. This study aimed to evaluate the validity, reliability, and sensitivity to change of a DiCI (a new HHD) for the strength measurement of knee and hip muscles and their ratios. Thirty-five recreational athletes completed quadriceps, hamstring, and hip adductors and abductors strength tests in two identical sessions with 1-week interval between them. A fatigue test was carried out for the quadriceps and hamstring. Consistency between DiCI and MicroFet2 was excellent (r > 0.939) for all strength tests. Relative reliability analysis showed good to excellent ICCs (ICC’s isolated muscle range = 0.93 to 0.96 and ICC’s ratios range = 0.70 to 0.82). Sensitivity to change showed large change magnitudes for quadriceps and hamstring fatigue (−1.89 and −1.26, respectively). DiCI is valid and reliable to assess knee and hip strength and sensitive to fatigue change.

摘要

许多专业人员使用手持式测功机（HHD）来评估等距强度。这项研究旨在评估DiCI（一种新的HHD）对膝部和髋部肌肉及其比率的强度测量的有效性，可靠性和敏感性。35名休闲运动员在两次相同的训练中完成了股四头肌，绳肌，髋关节内收肌和外展肌的力量测试，每两次间隔1周。对股四头肌和腿筋进行了疲劳测试。在所有强度测试中，DiCI和MicroFet2之间的一致性非常好（r> 0.939）。相对可靠性分析显示出良好的ICC（优秀的ICC）（ICC的孤立肌肉范围为0.93至0.96，ICC的比率范围为0.70至0.82）。股四头肌和绳肌疲劳的变化敏感性表现出较大的变化幅度（分别为-1.89和-1.26）。