Decreased Muscle Strength Relates to Self-Reported Stooping, Crouching, or Kneeling Difficulty in Older Adults

被引:57
作者
Hernandez, Manuel E. [1 ]
Goldberg, Allon [2 ]
Alexander, Neil B. [3 ,4 ]
机构
[1] Univ Michigan, Dept Biomed Engn, Mobil Res Ctr, Ann Arbor, MI 48105 USA
[2] Wayne State Univ, Sch Med, Dept Internal Med, Detroit, MI 48201 USA
[3] Univ Michigan, Inst Gerontol, Ann Arbor, MI 48105 USA
[4] VA Ann Arbor Hlth Care Syst Geriatr Res, Educ & Clin Ctr, Ann Arbor, MI USA
来源
PHYSICAL THERAPY | 2010年 / 90卷 / 01期
关键词
AGE-RELATED-CHANGES; PHYSICAL PERFORMANCE; INJURIOUS FALLS; BALANCE; MOBILITY; ANKLE; RISK; HIP; RELIABILITY; INDICATORS;
D O I
10.2522/ptj.20090035
中图分类号
R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学(修复外科学)];
学科分类号
100224 [整形外科学];
摘要
Background. Bending down and kneeling ire fundamental tasks of daily living, yet nearly quarter of older adults report having difficulty performing or being unable to perform these movements. Older adults with stooping, crouching, or kneeling (SCK) difficulty have demonstrated,in increased fall risk. Strength (force-generating capacity) measures may be useful for determining both SCK difficulty and fall risk. Objective. The purposes Of this study were: (1) to examine muscle strength differences in older adults with and without SCK difficulty and (2) to examine the relative contributions of trunk and leg muscle Strength to SCK difficulty. Design. This was a cross-sectional observational study. Methods. Community-dwelling older adults (age [(X) over bar +/- SD]=75.5 +/- 6.0 years) with SCK difficulty (n=27) or Without SCK difficulty (n=21) were tested for leg and trunk strength and functional mobility. Isometric strength at the trunk, hip, knee, and ankle also was normalized by body weight and height. Results. Compared with older adults with no SCK difficulty, those with SCK difficulty had significant decreases in normalized trunk extensor, knee extensor, and dorsiflexor and plantar flexor strength. In 2 separate multivariate analyses, raw ankle ankle plantar-flexor strength (odds ratio [OR]=0.97, 95% confidence interval [CI]=0.95-0.99) and normalized knee extensor strength (OR=0.61, 95% CI=0.44-0.82) were significantly associated with SCK difficulty. Stooping, crouching, and kneeling difficulty also correlated with measures of functional balance and falls. Limitations. Although muscle groups that were key to rising from SCK were examined, there are other muscle groups that May contribute to safe SCK performance. Conclusions. Decreased muscle Strength, particularly when normalized for body size, predicts SCK difficulty. These data emphasize the importance of strength measurement at multiple levels in predicting self-reported functional impairment.
引用
收藏
页码:67 / 74
页数:8
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