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Decreased muscle strength predicts functional impairments in older adults
Date:2/1/2010

Gerontology at the University of Michigan in Ann Arbor. Co-authors of the study are Manuel Hernandez, MS (lead author), and Neil Alexander, MD, both at the University of Michigan.

The study's purpose was to compare trunk and lower-extremity muscle strength differences in older adults who had difficulty with stooping, crouching, or kneeling with older adults who did not have these difficulties. The study analyzed 48 community-dwelling older adults, over age 65, with and without self-reported SCK difficulty. Participants rated their ability to stoop, crouch, or kneel according to a 5-point difficulty scale and were tested on balance, strength, and fall-related measures.

Researchers hypothesized that lower-extremity strength would be significantly decreased in older adults who have trouble stooping, crouching, or kneeling and that measures of distal strength would be the main predictors of these issues in patients. Results suggest that older adults who reported trouble with basic stooping, crouching, or kneeling also had decreased strength in their legs. Researchers also discovered a relationship between SCK difficulty and both the level of strength and the ability to maintain proper balance. Findings suggest that in older adults, a major contributor to SCK difficulty is the strength of the distal leg musculature, which may provide a common link to balance. Future investigation will examine how other trunk and lower-extremity muscle strength may be related to these daily tasks.

"The results of this study may have important implications for clinicians working to reduce falls risk in older adults," Goldberg explained. "Rehabilitation or intervention programs aimed at addressing deficits in self-reported performance in stooping, crouching, or kneeling should focus on improving distal strength. Although addressing strength deficits is very important, those with stooping, crouching, or kneeling difficulty may also benefit from comprehensive
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Contact: Jennifer Rondon
jenniferrondon@apta.org
703-706-3216
American Physical Therapy Association
Source:Eurekalert

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