The DOI matches its Crossref record; 30 of the 30 references it cites were found in a registry or an index.
Functionally Relevant Thresholds of Quadriceps Femoris Strength
Abstract
The purpose of this study was to identify quadriceps femoris strength thresholds below which performance on ambulatory tasks is compromised. A second purpose was to evaluate whether self-reported functioning matches evaluated performance of the activities. Subjects (N = 100; age 73 +/- 0.9 years) participated in isometric knee extension strength tests, performed three functional ambulatory tasks (chair rise, gait speed, and stair ascent and descent), and answered standard survey questions assessing physical function. Significant relationships were observed between functional performance and the ratio of isometric leg extension peak torque to body weight (STR/WT) for each activity (p <.0001). For each activity, thresholds of STR/WT between 3.0 and 3.5 N m/kg were observed, below which the likelihood for success was reduced. Thresholds were determined by calculating the value of STR/WT that minimized the classification error. Individuals with a STR/WT < 3.0 N m/kg are at a substantial risk for impaired function in chair rise, gait speed, and stair ascent and descent. Sensitivity and specificity of STR/WT as a predictor of functional success ranged from 76% to 81% and from 78% to 94%, respectively, depending on activity. This is of clinical significance, as the STR/WT thresholds can identify individuals with preclinical disability (beginning to have difficulty with ambulatory tasks) as opposed to those in whom an outright disability is observed. This may be useful for targeting individuals for strengthening interventions and developing specific intervention goals.
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Cites
(2014) · Medical Entomology and Zoology · Cited by 9,400
Leg extensor power and functional performance in very old men and women.
Bassey, E. J., Fiatarone, M. A., O'neill, E. F., Kelly, M., Evans, W. J., & Lipsitz, L. A. (1992) · Clinical Science · doi:10.1042/cs0820321 · Cited by 943
Chronic disability trends in elderly United States populations: 1982–1994
Manton, K. G., Corder, L., & Stallard, E. (1997) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.94.6.2593 · Cited by 680
Manton, K. G., & Gu, X. (2001) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.111152298 · Cited by 663
Strength is a major factor in balance, gait, and the occurrence of falls
Fukagawa, N. K., Wolfson, L., Judge, J., Whipple, R., & King, M. (1995) · The Journals of Gerontology Series A: Biological Sciences and Medical Sciences · doi:10.1093/gerona/50a.special_issue.64 · Cited by 617
Evidence for a non-linear relationship between leg strength and gait speed
BUCHNER, D. M., LARSON, E. B., WAGNER, E. H., KOEPSELL, T. D., & DE LATEUR, B. J. (1996) · Age and Ageing · doi:10.1093/ageing/25.5.386 · Cited by 542
Age-related changes in speed of walking
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Cited by
Lauretani, F., Russo, C. R., Bandinelli, S., Bartali, B., Cavazzini, C., Di Iorio, A., Corsi, A. M., Rantanen, T., Guralnik, J. M., & Ferrucci, L. (2003) · Journal of Applied Physiology · doi:10.1152/japplphysiol.00246.2003 · Cited by 1,946
Dynapenia and aging: an update
Manini, T. M., & Clark, B. C. (2012) · The Journals of Gerontology: Series A · doi:10.1093/gerona/glr010 · Cited by 875
Self-citationClark, B. C., & Manini, T. M. (2012) · Nutrition · doi:10.1016/j.nut.2011.12.002 · Cited by 414
Self-citationKnee Extension Strength Cutpoints for Maintaining Mobility
Manini, T. M., Visser, M., Won‐Park, S., Patel, K. V., Strotmeyer, E. S., Chen, H., Goodpaster, B., De Rekeneire, N., Newman, A. B., Simonsick, E. M., et al. (2007) · Journal of the American Geriatrics Society · doi:10.1111/j.1532-5415.2007.01087.x · Cited by 249
Self-citationThe Consequences of Resistance Training for Movement Control in Older Adults
Barry, B. K., & Carson, R. G. (2004) · The Journals of Gerontology Series A: Biological Sciences and Medical Sciences · doi:10.1093/gerona/59.7.m730 · Cited by 169
Metadata
- Authors
- Ploutz-Snyder, L. L., Manini, T., Ploutz-Snyder, R. J., & Wolf, D. A.
- Venue
- The Journals of Gerontology Series A: Biological Sciences and Medical Sciences
- Publisher
- Oxford University Press (OUP)
- Published
- 2002-04-01
- Volume
- 57
- Issue
- 4
- Pages
- B144-B152
- ISSN
- 1079-5006 (ISSN-L)
- 1758-535X
- OpenAlex
- W2113730892
- Cited by
- 300
- References
- 30
- FWCI
- 18.52
- Type
- journal article
- Language
- en
- Open access
- closed
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