Comparative assessment of knee extensor and flexor muscle strength measured using a hand-held vs. isokinetic dynamometer

[Purpose] To compare measurements of knee extensor and flexor muscle strength performed using a hand-held dynamometer and an isokinetic dynamometer in apparently healthy subjects. [Subjects and Methods] Thirty adult volunteers underwent knee muscle strength evaluation using an isokinetic or a hand-h...

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Bibliographic Details
Published in:Journal of physical therapy science Vol. 28; no. 9; p. 2445
Main Authors: Muff, Guillaume, Dufour, Stéphane, Meyer, Alain, Severac, François, Favret, Fabrice, Geny, Bernard, Lecocq, Jehan, Isner-Horobeti, Marie-Eve
Format: Journal Article
Language:English
Published: Japan 2016
Subjects:
Muscle
Strength
Dynamometer
ISSN:0915-5287
Online Access:Get more information
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Summary:[Purpose] To compare measurements of knee extensor and flexor muscle strength performed using a hand-held dynamometer and an isokinetic dynamometer in apparently healthy subjects. [Subjects and Methods] Thirty adult volunteers underwent knee muscle strength evaluation using an isokinetic or a hand-held dynamometer. [Results] Strong positive correlations were found between the 2 methods, with correlation coefficients r ranging from 0.72 (95% confidence interval [CI], 0.48-0.86) to 0.87 (95% CI, 0.75-0.94), depending on the muscle group and the isokinetic evaluation mode. The reproducibility of the hand-held dynamometer findings was good, judged by a coefficient of variation of 3.2-4.2%. However, the correlation between the 2 methods for the assessment of flexor/extensor ratios ranged from -0.04 to 0.46. [Conclusion] Knee extensor and flexor muscle strength recorded with a hand-held dynamometer is reproducible and significantly correlated with the isokinetic values, indicating that this method may in some cases be a useful replacement for isokinetic strength measurement. However, for strength ratio assessment, and when judged against the isokinetic standard, a hand-held dynamometer is not a valid option.
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ISSN:0915-5287
DOI:10.1589/jpts.28.2445