Author: Fan, Chi-chung Andy
Title: Effect of elbow position on hand grip strength development & repeatability of measurement
Degree: M.Sc.
Year: 1999
Subject: Hand -- Physiology
Muscle strength
Hong Kong Polytechnic University -- Dissertations
Department: Multi-disciplinary Studies
Department of Rehabilitation Sciences
Pages: xi, 64 leaves : col. ill. ; 31 cm
Language: English
Abstract: The purpose of this study was to investigate the effect of elbow position on hand grip strength and between-day repeatability with the Jamar dynamometer. A sample of 30 healthy right-hand dominant subjects (15 males, 15 females) was recruited for this study. Their age ranged from 22 to 40 (mean = 31.6 +/- 5.29) years. Grip strength measurements were taken with the elbow positioned at 0o, 30o, 60o, 90o and 120o flexion for both hands of all the subjects. Repeated measures ANOVA was used to compare grip strength at different elbow positions for both sides. On the between-day repeatability study, each subject was tested one week after the first testing. They were systematically stratified into five groups, corresponding to the five elbow positions above, with six subjects in each group. High intraclass correlation coefficients (all above 0.98) were obtained which indicate that grip strength assessment is stable and reliable over time, if elbow and other body positions were standardized. For the effect of elbow positions on grip strength, the highest and lowest mean grip strength measurements were obtained in 90o and 120o of elbow flexion, respectively. Statistical analysis showed that there was significantly lower grip strength (p=0.000) in 120o of elbow flexion when compared to the other elbow positions. Also, the grip strength was significantly higher (p=0.05) in 90o when compared to 0o of elbow flexion on the left side. No statistical significant difference was found in other data pairs. The present study indicates that there is a need to maintain a standardized testing position during hand grip evaluation. The knowledge of how changes in elbow position could affect grip strength should be considered in rehabilitation program and in daily activities so as to enhance function.
Rights: All rights reserved
Access: restricted access

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