Van Cant Joachim, Detrembleur Christine, Mahaudens Philippe, Feipel Véronique
Institute of Neuroscience, Faculty of Motor Sciences, Université Catholique de Louvain, Brussels, Belgium.
Laboratory of Functional Anatomy, Faculty of Motor Sciences, Université Libre de Bruxelles, Brussels, Belgium.
Int J Sports Phys Ther. 2020 Apr;15(2):238-245.
Substantial deficits in the performance of the hip abductor muscles are reported in females with common lower extremity conditions. In this context, the hip abductor isometric test (HAIE) test has been developed to assess the endurance of the hip abductors.
The aims of the study were: 1) to assess the test-retest reliability of the HAIE test and 2) to determine if the HAIE test is valid for the measuring hip abductor muscle fatigue.
Diagnostic accuracy of clinical tests; test retest reliability and validity.
Fifty-two healthy females, aged 18-30 years, were recruited. In two identical sessions, spaced by seven days, the participants performed the HAIE test and the test-retest reliability (ICC, SEM and MDC) was calculated. In ten subjects, surface EMG was used during the test in order to observe the change in the median frequency of EMG output of the gluteus medius and to determine if decrease of the median frequency is correlated with performance on the test, in order to discern validity.
The HAIE test demonstrated good test-retest reliability (ICC = 0.84, SEM = 11.5 seconds and MDC = 32.8 seconds). Significant differences were noted between the average median frequency of participants for the last four fifteen second intervals (p = 0.02). Moderate correlation between MFslope and endurance time (r = 0.56, p = 0.008) and strong correlation between MFslope75s and endurance time (r = 0.71, p = 0.001) were found.
The results from this study support that the HAIE test is a reliable test for evaluating the endurance of the hip abductors. Further investigations should continue to explore the validity of the test, especially to determine which muscles limit the endurance time in healthy and unhealthy subjects.
2b.
据报道，患有常见下肢疾病的女性髋关节外展肌功能存在显著缺陷。在此背景下，已开发出髋关节外展肌等长试验（HAIE）来评估髋关节外展肌的耐力。
本研究的目的是：1）评估HAIE试验的重测信度；2）确定HAIE试验是否可有效测量髋关节外展肌疲劳。
临床试验的诊断准确性；重测信度和效度。
招募了52名年龄在18至30岁之间的健康女性。在间隔七天的两次相同测试中，参与者进行HAIE试验，并计算重测信度（ICC、SEM和MDC）。在10名受试者中，测试期间使用表面肌电图以观察臀中肌肌电图输出的中位频率变化，并确定中位频率的降低是否与测试表现相关，以辨别效度。
HAIE试验显示出良好的重测信度（ICC = 0.84，SEM = 11.5秒，MDC = 32.8秒）。在最后四个15秒间隔内，参与者的平均中位频率存在显著差异（p = 0.02）。发现MF斜率与耐力时间之间存在中度相关性（r = 0.56，p = 0.008），MF斜率75秒与耐力时间之间存在强相关性（r = 0.71，p = 0.001）。
本研究结果支持HAIE试验是评估髋关节外展肌耐力的可靠试验。进一步的研究应继续探索该试验的效度，特别是确定在健康和不健康受试者中哪些肌肉限制了耐力时间。
2b。
