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Relative validity and reliability of isometric lower extremity strength assessment in older adults by using a handheld dynamometer
- Source :
- Sports Health, 14(6), 899-905. Sage Periodicals Press, Sports Health, 14(6), 899-905, Sports Health, Sports Health 14 (2022) 6
- Publication Year :
- 2022
- Publisher :
- SAGE Publications, 2022.
-
Abstract
- Background: Handheld dynamometry (HHD) is a practical alternative to traditional testing of lower extremity strength. However, its reliability and validity across different populations and settings are not clear. Hypothesis: We hypothesize that HHD is a valid and reliable device to assess lower extremity strength in a population of older adults. Study Design: Cross-sectional/cohort. Level of Evidence: Level 3. Methods: This study included 258 older adults (≥65 years). Isometric knee extension and flexion force were measured by 1 examiner, using an HHD (n = 222), including 3 repetitions to calculate within-day intrarater reliability. These measurements were repeated by the examiner in a subgroup (n = 23) to analyze intrarater reliability over a test-retest period of on average 8 weeks. In addition, HHD force measures were performed by a second examiner (n = 29) to analyze interrater reliability. In another subgroup (n = 77), isometric knee extension and flexion torque were measured by 1 examiner using both the HHD and Biodex System 4 to assess relative validity. Results: HHD and Biodex measurements were highly correlated and showed excellent concurrent validity. HHD systematically overestimated torque as compared with Biodex by 8 N·m on average. Same-day intrarater intraclass correlation coefficients (ICCs) ranged from 0.97 to 0.98. Interrater reliability ICCs ranged from 0.83 to 0.95. Conclusion: HHD represents a reliable and valid alternative to Biodex to rank individuals on leg strength, or to assess within-person changes in leg strength over time, because of the high validity and reliability. The HHD is less suited for absolute strength assessment because of significant systematic overestimations. Clinical Relevance: Clinicians are encouraged to use HHD to rank older adults on leg strength, or to assess within-person changes in leg strength over time, but not to compare readings with cut-offs or normative values.
- Subjects :
- leg strength
Physical Therapy, Sports Therapy and Rehabilitation
Muscle Strength Dynamometer
Biodex
MASS
Voeding, Metabolisme en Genomica
MUSCLE STRENGTH
intrarater reliability
Voeding
Isometric Contraction
interrater reliability
Humans
Orthopedics and Sports Medicine
MicroFET
Nutrition
Aged
VLAG
Global Nutrition
Wereldvoeding
accuracy
Current Research
Metabolism and Genomics
Nutritional Biology
Cross-Sectional Studies
Metabolisme en Genomica
lower extremity
Nutrition, Metabolism and Genomics
reproducibility of results
Subjects
Details
- Language :
- English
- ISSN :
- 19417381
- Database :
- OpenAIRE
- Journal :
- Sports Health, 14(6), 899-905. Sage Periodicals Press, Sports Health, 14(6), 899-905, Sports Health, Sports Health 14 (2022) 6
- Accession number :
- edsair.doi.dedup.....e7149d45e5faadc39912674e56697996