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J Biomech. 2018 Jun 25;75:171-175. doi: 10.1016/j.jbiomech.2018.04.032. Epub 2018 Apr 27.

Assessment of isometric muscle strength and rate of torque development with hand-held dynamometry: Test-retest reliability and relationship with gait velocity after stroke.

Author information

1
Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Sunshine Coast, Australia; Physiotherapy Department, Epworth HealthCare, Melbourne, Australia; La Trobe Sport and Exercise Medicine Research Centre, La Trobe University, Melbourne, Australia. Electronic address: b.mentiplay@latrobe.edu.au.
2
Physiotherapy Department, Singapore General Hospital, Singapore.
3
Physiotherapy Department, Epworth HealthCare, Melbourne, Australia; Physiotherapy Department, University of Melbourne, Melbourne, Australia.
4
Centre for Disability and Development Research, Australian Catholic University, Melbourne, Australia.
5
Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Sunshine Coast, Australia.

Abstract

Isometric rate of torque development examines how quickly force can be exerted and may resemble everyday task demands more closely than isometric strength. Rate of torque development may provide further insight into the relationship between muscle function and gait following stroke. Aims of this study were to examine the test-retest reliability of hand-held dynamometry to measure isometric rate of torque development following stroke, to examine associations between strength and rate of torque development, and to compare the relationships of strength and rate of torque development to gait velocity. Sixty-three post-stroke adults participated (60 years, 34 male). Gait velocity was assessed using the fast-paced 10 m walk test. Isometric strength and rate of torque development of seven lower-limb muscle groups were assessed with hand-held dynamometry. Intraclass correlation coefficients were calculated for reliability and Spearman's rho correlations were calculated for associations. Regression analyses using partial F-tests were used to compare strength and rate of torque development in their relationship with gait velocity. Good to excellent reliability was shown for strength and rate of torque development (0.82-0.97). Strong associations were found between strength and rate of torque development (0.71-0.94). Despite high correlations between strength and rate of torque development, rate of torque development failed to provide significant value to regression models that already contained strength. Assessment of isometric rate of torque development with hand-held dynamometry is reliable following stroke, however isometric strength demonstrated greater relationships with gait velocity. Further research should examine the relationship between dynamic measures of muscle strength/torque and gait after stroke.

KEYWORDS:

Muscle power; Neurological rehabilitation; Rate of force development; Stroke; Weakness

PMID:
29731325
DOI:
10.1016/j.jbiomech.2018.04.032
[Indexed for MEDLINE]

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