Absolute strength and loss of strength as predictors of mobility decline in older adults: the InCHIANTI study
Open accessAbstract
BACKGROUND: Theoretical definitions of sarcopenia traditionally emphasize age-related loss of muscle strength; however, most analyses of the association between strength and mobility examine strength at a single time point. This study sought to identify sex-specific cutpoints for muscle strength and power (at one time point) and 3-year changes in strength and power that would maximize prediction of 3-year mobility decline. METHODS: Longitudinal analysis of 934 adults aged ≥65 years enrolled in the Invecchiare in Chianti study was conducted. Grip strength, knee extension strength, and lower extremity power were measured at baseline and 3 years postenrollment. Mobility function (gait speed and self-reported mobility disability) was measured at 3 and 6 years postenrollment. Classification and regression tree analysis was used to predict mobility decline from Years 3 to 6. RESULTS: Men with knee extension strength <19.2 kg and grip strength <39.0 kg had clinically meaningful declines in gait speed of .24 m/s. Furthermore, men with power <105 W were nearly nine times more likely to develop incident mobility disability (likelihood ratio = 8.68; 95% confidence interval = 3.91, 19.44). Among women, knee extension strength <18.0 kg was associated with a minimal gait speed decline of 0.06 m/s, and women with leg power <64 W were three times more likely to develop incident mobility disability (likelihood ratio = 3.01; 95% confidence interval = 1.79, 5.08). Three-year changes in strength and power did not predict mobility decline in either sex. CONCLUSIONS: Findings suggest that strength and power measured at one time point are more predictive of mobility decline than 3-year changes and that low strength and power are particularly powerful risk factors in men.
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- Authors
- Hicks, G. E., Shardell, M., Alley, D. E., Miller, R. R., Bandinelli, S., Guralnik, J., Lauretani, F., Simonsick, E. M., & Ferrucci, L.
- Affiliations
- University of Maryland, Baltimore (US)
- Azienda Sanitaria di Firenze (IT)
- National Institutes of Health (US)
- University of Parma (IT)
- Johns Hopkins University (US)
- National Institute on Aging (US)
- ORCID
- Venue
- The Journals of Gerontology Series A: Biological Sciences and Medical Sciences
- Publisher
- Oxford University Press (OUP)
- Published
- 2011-05-05
- Volume
- 67A
- Issue
- 1
- Pages
- 66-73
- ISSN
- 1079-5006 (ISSN-L)
- 1758-535X
- PMC
- PMC3260485
- OpenAlex
- W2097701643
- Cited by
- 229
- References
- 37
- Citations by year
- 2026: 9 · 2025: 6 · 2024: 8 · 2023: 10 · 2022: 23 · 2021: 17 · 2020: 20 · 2019: 14 · 2018: 14 · 2017: 17 · 2016: 19 · 2015: 21 · 2014: 19 · 2013: 12 · 2012: 17
- FWCI
- 10.96
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- The Journals of Gerontology Series A (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Ministero della Salute (263 MD 821336)
- National Institutes of Health (263 MD 821336)
- National Institute on Aging (821336, 263MD821336, R01AG029315, K23AG019161)
- National Institute on Minority Health and Health Disparities (263-MD-916413, 263MD 821336)
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (R21HD057274, K12HD043489)
- Topics
- Health Sciences › Medicine › Physiology › Nutrition and Health in Aging
- Health Sciences › Medicine › Geriatrics and Gerontology › Frailty in Older Adults
- Health Sciences › Health Professions › Physical Therapy, Sports Therapy and Rehabilitation › Balance, Gait, and Falls Prevention
- Keywords
- sarcopenia, muscle strength, muscle power, mobility decline, walking speed, mobility impairment, older adults, sex differences, grip strength, quadriceps strength, leg power, risk prediction, InCHIANTI study
- MeSH terms
- Aged, Aged, 80 and over, Female, Gait, Humans, Knee, Longitudinal Studies, Male, Geriatric Assessment, Muscle, Skeletal, Hand Strength, Mobility Limitation, Muscle Strength, Sarcopenia
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