Reliability and Validity of A Novel Hand-held Dynamometer for Muscles Strength of Lower Extremities

VernacularTitle:手持型肌力测定仪测量下肢肌力的信度与效度
Author: Yanbing JIA ; Hao LIU ; Yuan XIONG ; Chushan WANG ; Wenxia HONG ; Linsen ZHONG ; Zhanwu HUANG ; Shijie ZHANG
Keywords: hand-held dynamometer; reliability; validity; lower extremity; muscle strength
From: Chinese Journal of Rehabilitation Theory and Practice 2017;23(5):572-574
CountryChina
Language:Chinese
Abstract: Objective To investigate the reliability and validity of a novel hand-held dynamometer, OE-210, for muscles strength of low-er extremities. Methods From March 1st to August 30th, 2016, 38 young adults were tested the muscle strength of quadriceps and ham-strings with OE-210 dynamometer by 2 rators, and were retested by one of the raters three days later. The isokinetic test was also conducted on all the subjects one day afterwards. The intraclass correlation coefficient (ICC) of OE-210 test results and the Pearson's correlation coeffi-cient between results of OE-210 and isokinetic test were calculated. Results The ICC of test-retest were 0.718 to 0.924, and the ICC of in-ter-rater were 0.784 to 0.870. The correlation between muscle performance measured with 2 tools were significant (P<0.001), that was light to medium on quadriceps (r=0.270-0.413), and strong on hamstrings (r=0.582-0.668). Conclusion OE-210 dynamometer was reliable for muscle strength measurement on quadriceps and hamstrings, and the conditions for valid application need further research.