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:: Volume 5, Issue 1 (19 2011) ::
mrj 2011, 5(1): 19-25 Back to browse issues page
Comparison of the test-retest reliability of hip strength measurements using dynamometer fixed by hand versus fixed to a stable frame in female athletes
Narges Meftahi 1, Javad Saraf Zadeh 2, Nader Marofi 1, Mohammad Sanjary 1, Hassan Jafari 1
1- دانشکده توانبخشی دانشگاه علوم پزشکی تهران
2- دانشکده توانبخشی دانشگاه علوم پزشکی تهران ,  j-sarrafzadeh@tums.ac.ir 
Abstract:   (6123 Views)

Background and aim: Assessment of hip strength needs a reliable method. Hand-held dynamometers are appropriate alternatives for manual muscle testing and isokinetics. Stabilizing the dynamometer with hand will increase error in measurements. The purpose of this study was to compare the test-retest reliability of hand-held dynamometer fixed by hand and fixed to a new stable frame for measuring hip extension, abduction and external rotation strength in healthy female athletes.
Materials and Methods: Normalized average and peak values of torque of three successive trials for each muscle group were calculated in two sessions one week apart in ten healthy female athletes. Strength was measured with hand-held dynamometer fixed by hand and fixed to the stable frame in each session. Intra-class correlation coefficients (ICC), coefficients of variation (CV) and standard error of measurement (SEM) were calculated to determine the reliability.
Results: For hip extension, abduction, and external rotation strength measured by hand fixation. The ICC ranged from -1.22 to 0.6, the CV ranged from 8% to 33% and the SEM ranged from 0.007 to 0.04. For strength measurements with stable frame, the ICC ranged from .93 to .96, and CV ranged from 5.26% to 7.94%. The range of the SEM was from .004 to .08.
Conclusion: Measurements of hip muscles strength with a dynamometer fixed to a stable frame showed higher reliability than fixation by hand in young female athletes. These findings support the error within hand fixation of dynamometers and the necessity for providing better fixation.

Keywords: Hand-held dynamometer, Hip muscle strength, reliability
Full-Text [PDF 431 kb]   (5763 Downloads)    
Type of Study: Research | Subject: General
Received: 2011/05/30 | Accepted: 2011/07/20 | Published: 2013/07/14
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Meftahi N, Saraf Zadeh J, Marofi N, Sanjary M, Jafari H. Comparison of the test-retest reliability of hip strength measurements using dynamometer fixed by hand versus fixed to a stable frame in female athletes. mrj. 2011; 5 (1) :19-25
URL: http://mrj.tums.ac.ir/article-1-81-en.html


Volume 5, Issue 1 (19 2011) Back to browse issues page
فصلنامه توانبخشی نوین Journal of Modern Rehabilitation
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