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首页> 外文期刊>The journals of gerontology.Series A. Biological sciences and medical sciences >Lower extremity strength and power are associated with 400-meter walk time in older adults: The InCHIANTI study.
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Lower extremity strength and power are associated with 400-meter walk time in older adults: The InCHIANTI study.

机译：老年人的下肢力量和力量与400米的步行时间有关：InCHIANTI研究。

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BACKGROUND: It has been suggested that lower extremity muscle power is more important for physical function in older adults compared to strength, and that there is a nonlinear relationship between power or strength and physical function that might be indicative of a threshold above which the association between muscle function and physical function is no longer evident. This study examined the association between lower extremity strength or power with the time to complete a 400-meter walk, and attempted to identify thresholds within the relationship. METHODS: A cross-sectional analysis of a sample of 384 females and 336 males aged > or = 65 years from the InCHIANTI study ("Invecchiare in Chianti," i.e., Aging in the Chianti Area) was conducted. Measures included 400-meter walk time, lower extremity strength and power, comorbidities, and sociodemographic variables (age, gender, height, education, cognitive function, depression). RESULTS: Linear regression models showed that both lower extremity strengthand power were significant predictors of 400-meter walk time, although power explained marginally more of the variance in 400-meter walk time. Quadratic models of lower extremity strength and power fit the data slightly better than the linear models. Regardless of gender, comorbidities, or normalization scheme for strength and power, the curvilinear form of the relationship between strength or power and 400-meter walk time remained the same. CONCLUSIONS: Lower extremity muscle strength and power are both important predictors of the 400-meter walk time. Although curvilinear relationships existed between muscle strength and power and the 400-meter walk time, the data do not indicate a clear threshold for either strength or power above which the performance in the 400-meter walk test plateaus.
机译：背景：有研究表明，下肢肌肉力量对老年人的身体功能而言比力量更为重要，并且力量或力量与身体功能之间存在非线性关系，可能表明阈值高于该阈值，肌肉功能和身体功能不再明显。这项研究检查了下肢力量或力量与完成400米步行的时间之间的关联，并试图确定关系中的阈值。方法：从InCHIANTI研究（“ Chianti地区的Invecchiare”，即Chianti地区的老龄化）中对年龄≥65岁的384名女性和336名男性进行了横断面分析。测量包括步行400米，下肢力量和力量，合并症以及社会人口统计学变量（年龄，性别，身高，教育程度，认知功能，抑郁）。结果：线性回归模型表明，下肢力量和力量都是400米步行时间的重要预测指标，尽管力量在400米步行时间的变化幅度很小。下肢力量和力量的二次模型比线性模型拟合数据更好。不论性别，合并症或强度和力量的归一化方案，强度或力量与400米步行时间之间关系的曲线形式都保持不变。结论：下肢的肌肉力量和力量都是400米步行时间的重要预测指标。尽管肌肉力量和力量与400米步行时间之间存在曲线关系，但数据并没有为力量或力量提供明确的阈值，超过此阈值，则在400米步行测试高原中的表现。

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