Effects of body composition and leisure-time physical activity on transitions in physical functioning in the elderly
Effects of body composition and leisure-time physical activity on transitions in physical functioning in the elderly
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DOI：
10.1093/aje/kwi254
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发表时间：
2005-10-01
影响因子：
5
通讯作者：
van der Laan, M
中科院分区：
文献类型：
--
作者：
Haight, T;Tager, I;van der Laan, M
身体活动和身体成分进行了检查方面的变化，在6年的时间（1994年和2000年之间进行了四次调查）的基础上，1 655个社区居住的老年妇女和男子生活在索诺马，加州的队列功能限制。功能限制和体力活动的措施是基于标准的自我报告问题。身体成分的措施（瘦体重，脂肪量）估计生物电阻抗使用人群特异性预测方程来自双能X射线吸收。对于女性来说，在所有调查中，瘦体重：脂肪质量比增加一个单位会使限制报告减少65.5%（95%置信区间：21.8，87.4）。男子没有观察到类似的减少;然而，在任何调查中，报告没有限制的人数增加了3%。高水平的体力活动的影响减少了36.8%（95%置信区间：0.0，92.2）男性和52.7%（95%置信区间：13.5，91.9）女性在最近一次调查中发生的新的功能限制。总之，较高水平的体力活动似乎可以降低未来功能限制的风险，条件是在残疾过程早期通过瘦体重：脂肪质量比建立的功能水平。
Physical activity and body composition were examined with respect to variation in functional limitation over a 6-year period (four surveys conducted between 1994 and 2000) based on a cohort of 1,655 community-dwelling older women and men living in Sonoma, California. Measures of functional limitation and physical activity were based on standard self-report questions. Measures of body composition (lean mass, fat mass) were estimated from bioelectric impedance by using population-specific prediction equations derived from dual-energy x-ray absorptiometry. For women, a one-unit gain in lean mass:fat mass ratio reduced the report of limitation at all surveys 65.5% (95% confidence interval: 21.8, 87.4). A similar reduction was not observed for men; however, there was a 3% increase in the report of no limitation at any survey. The effect of high levels of physical activity reduced new functional limitation that occurred at the last survey by 36.8% (95% confidence interval: 0.0, 92.2) for men and 52.7% (95% confidence interval: 13.5, 91.9) for women. In summary, higher levels of physical activity appeared to reduce the risk of future functional limitation conditional on the level of functioning established early in the disablement process by lean mass:fat mass ratio.