Journal article
Assessment of lower limb muscle strength and power using hand-held and fixed dynamometry: A reliability and validity study
PLoS One, Vol.10(10), e0140822
2015
Abstract
Introduction Hand-held dynamometry (HHD) has never previously been used to examine isometric muscle power. Rate of force development (RFD) is often used for muscle power assessment, however no consensus currently exists on the most appropriate method of calculation. The aim of this study was to examine the reliability of different algorithms for RFD calculation and to examine the intra-rater, inter-rater, and inter-device reliability of HHD as well as the concurrent validity of HHD for the assessment of isometric lower limb muscle strength and power. Methods 30 healthy young adults (age: 23±5yrs, male: 15) were assessed on two sessions. Isometric muscle strength and power were measured using peak force and RFD respectively using two HHDs (Lafayette Model-01165 and Hoggan microFET2) and a criterion-reference Kin-Com dynamometer. Statistical analysis of reliability and validity comprised intraclass correlation coefficients (ICC), Pearson correlations, concordance correlations, standard error of measurement, and minimal detectable change. Results Comparison of RFD methods revealed that a peak 200ms moving window algorithm provided optimal reliability results. Intra-rater, inter-rater, and inter-device reliability analysis of peak force and RFD revealed mostly good to excellent reliability (coefficients ô 0.70) for all muscle groups. Concurrent validity analysis showed moderate to excellent relationships between HHD and fixed dynamometry for the hip and knee (ICCs ô 0.70) for both peak force and RFD, with mostly poor to good results shown for the ankle muscles (ICCs = 0.31-0.79). Conclusions Hand-held dynamometry has good to excellent reliability and validity for most measures of isometric lower limb strength and power in a healthy population, particularly for proximal muscle groups. To aid implementation we have created freely available software to extract these variables from data stored on the Lafayette device. Future research should examine the reliability and validity of these variables in clinical populations. © 2015 Mentiplay et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Details
- Title
- Assessment of lower limb muscle strength and power using hand-held and fixed dynamometry: A reliability and validity study
- Authors
- Benjamin Mentiplay (Author) - Australian Catholic UniversityL G Perraton (Author) - Australian Catholic UniversityKelly Bower (Author) - Australian Catholic UniversityB Adair (Author) - Australian Catholic UniversityYong-Hao Pua (Author) - Singapore General HospitalG P Williams (Author) - University of MelbourneR McGaw (Author) - Australian Catholic UniversityRoss Clark (Author) - Australian Catholic University
- Publication details
- PLoS One, Vol.10(10), e0140822
- Publisher
- Public Library of Science
- Date published
- 2015
- DOI
- 10.1371/journal.pone.0140822
- ISSN
- 1932-6203
- Copyright note
- Copyright © 2015 Mentiplay et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
- Organisation Unit
- University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy; School of Health and Behavioural Sciences - Legacy; School of Health - Public Health
- Language
- English
- Record Identifier
- 99450423402621
- Output Type
- Journal article
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