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Power Versus Sarcopenia: Associations with Functionality and Physical Performance Measures
1Gulistan Bahat, Istanbul University, Istanbul Medical School, Department of Internal Medicine, Capa, 34390, Istanbul, Turkey, Telephone: + 90 212 414 20 00-33204, Fax: + 90 212 532 42 08,
The Journal of Nutrition, Health & Aging
|December 28, 2020
Summary
Low muscle power, assessed using a practical sit-to-stand test, is strongly linked to functional decline in older adults. This measure shows greater association with disability than sarcopenia, highlighting its clinical importance.
Area of Science:
- Gerontology
- Muscle Physiology
- Biomedical Engineering
Background:
- Sarcopenia assessment is widely studied, but low muscle power evaluation remains underexplored.
- Assessing muscle power is challenging in clinical practice.
- This study compares low muscle power and sarcopenia associations with functional and performance measures.
Purpose of the Study:
- To compare the associations of low muscle power and sarcopenia with functional and performance measures in older adults.
- To evaluate the utility of a practical muscle power assessment.
Main Methods:
- Retrospective and cross-sectional study of community-dwelling older adults.
- Muscle power assessed via a 5-repetition sit-to-stand power test, adjusted for body weight.
- Sarcopenia defined using EWGSOP2 criteria; functional measures included ADL, IADL, TUG, and UGS.
Main Results:
- Low muscle power was significantly associated with impaired ADL (OR=2.4) and IADL (OR=2.4), and impaired usual gait speed (UGS) (OR=6.6).
- Probable sarcopenia was associated with impaired IADL (OR=3.6) and UGS (OR=2.4), but confirmed sarcopenia was not significantly related to these measures.
- Low muscle power demonstrated stronger associations with functional and performance deficits than sarcopenia.
Conclusions:
- A practical muscle power test (5-repetition sit-to-stand) is a convenient and valuable measure for assessing functional status in older adults.
- Low muscle power is a more sensitive indicator of functional impairment than sarcopenia.
- Further longitudinal research is warranted to confirm predictive value for future functional decline.
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