《Chinese Journal of Rehabilitation Theory and Practice》 ›› 2017, Vol. 23 ›› Issue (5): 572-574.doi: 10.3969/j.issn.1006-9771.2017.05.017

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

JIA Yan-bing, LIU Hao2, XIONG Yuan, WANG Chu-shan, HONG Wen-xia, ZHONG Lin-sen3, HUANG Zhan-wu3, ZHANG Shi-jie3   

  1. 1. a. Department of Physical Therapy; b. Guangdong-Hongkong Joint Sports Injury Rehabilitation and Research Center, Guangdong Provincial Work Injury Rehabilitation Hospital, Guangzhou, Guangdong 510440, China;
    2. Rehabilitation Department, JORU Rehabilitation Hospital, Yixing, Jiangsu 214200, China;
    3. Department of Physical Therapy, Dongguan Rehabilitation Hospital, Dongguan, Guangdong 523119, China
  • Received:2016-09-25 Revised:2017-01-13 Published:2017-05-25 Online:2017-05-24
  • Contact: LIU Hao. E-mail: liuhao0909@163.com

Abstract: Objective To investigate the reliability and validity of a novel hand-held dynamometer, OE-210, for muscles strength of lower extremities. Methods From March 1st to August 30th, 2016, 38 young adults were tested the muscle strength of quadriceps and hamstrings 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 coefficient 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 inter-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.

Key words: hand-held dynamometer, reliability, validity, lower extremity, muscle strength

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