Relationships among impairments in lower-extremity strength and power, functional limitations, and disability in older adults
Relationships among impairments in lower-extremity strength and power, functional limitations, and disability in older adults
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DOI：
10.2522/ptj.20060176
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发表时间：
2007-10-01
期刊：
影响因子：
3.2
通讯作者：
Nielsen, David H.
中科院分区：
文献类型：
--
作者：
Puthoff, Michael L.;Nielsen, David H.
背景和目的在衰老过程中，老年人可能会经历力量和力量的丧失，这可能导致功能限制和残疾。本研究的目的是研究在社区居住的老年人中，下肢力量和力量的损伤与功能限制和残疾之间的关系。30名老年人(年龄[(X) > bar +/- SD], 77.3 +/- 7.0岁；25名女性和5名男性)轻度至中度功能限制参加了这项研究。方法采用气压阻力腿压法测定慢肢力量、峰值功率、低相对强度功率和高相对强度功率。采用短时间物理性能测试（SPPB）、6分钟步行测试（SMWT）和晚期生活功能和残疾测试（LLFDI）评估功能限制和残疾。结果所有的力量和力量测量都与功能限制有关。峰值功率与SMWT、SPPB步态速度子量表和LLFDI功能限制分量的关系最强。高相对强度的权力与SPPB总分和SPPB坐立分量表得分的关系最强。所有强度和权力的测量都与LLFDI残疾成分间接相关。讨论与结论老年人应注重在一定强度范围内增加和维持下肢力量和力量，以减少功能限制和残疾。
Background and PurposeDuring the aging process, older adults may experience a loss of strength and power, which then may lead to functional limitations and disability. The purpose of this study was to examine how impairments in lower-extremity strength and power are related to functional limitations and disability in community-dwelling older adults.SubjectsThirty older adults (age [(X) over bar +/- SD], 77.3 +/- 7.0 years; 25 women and 5 men) with mild to moderate functional limitations participated in this study.MethodsLower-extremity strength, peak power, power at a low relative intensity, and power at a high relative intensity were measured with a pneumatic resistance leg press. Functional limitations and disability were assessed with the Short Physical Performance Battery (SPPB), the Six-Minute Walk Test (SMWT), and the Late Life Function and Disability Instrument (LLFDI).ResultsAll measures of strength and power were related to functional limitations. Peak power demonstrated the strongest relationships with SMWT, the SPPB gait speed subscale, and the LLFDI functional limitation component. Power at a high relative intensity demonstrated the strongest relationships to the SPPB total score and the SPPB sit-to-stand subscale score. All measures of strength and power were indirectly related to the LLFDI disability component.Discussion and ConclusionOlder adults should focus on increasing and maintaining lower-extremity strength and power across a range of intensities in order to decrease functional limitations and disability.