Maximal voluntary and functional performance levels needed for independence in adults aged 65 to 97 years
Maximal voluntary and functional performance levels needed for independence in adults aged 65 to 97 years
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DOI：
10.1093/ptj/83.1.37
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发表时间：
2003-01-01
期刊：
影响因子：
3.2
通讯作者：
Meyer, M
中科院分区：
文献类型：
--
作者：
Cress, ME;Meyer, M
背景和目的。相关损失。肌肉质量和心血管耐力的下降会导致肌肉力量产生和心脏功能受损，进而限制日常生活中必不可少的活动的表现。本研究的目的是：（1）确定“断点”或阈值的最大自愿性能和性能，在普通的日常功能和（2）评估阈值的预测有效性，以确定能力。独立生活，没有自我报告的功能限制。主题和方法。男性和女性（N=192;平均年龄=76岁，SD=7，范围=65-97）从具有多层次护理的单户社区住宅或退休社区招募。采用连续量表身体功能测试（CS-PFP）测量身体功能。最大自主运动能力指标包括峰值耗氧量（V/dot（2 peak））和等速膝伸肌力矩（KET）。使用CS-PFP对体能指标的分段线性回归模型来确定阈值及其置信区间。采用逻辑回归模型评估CS-PFP评分识别独立生活者的能力，并进一步说明阈值和身体储备的概念。结果确定的（V）过点O-2峰值（20 mL.kg（-1）.min（-1））和KET（2.5 N.m/[kg.m（-1）]）阈值与CS-PFP评分平均值57个单位相关。该阈值准确预测了报告功能限制的个体。讨论和结论..这些阈值提供了一种机制，可以轻松估计个人的身体储备、预测生活状态的依赖性，并为晚年独立性的干预提供公正的指导。
Background and Purpose. Age-related loss. of muscle mass and cardiovascular endurance can lead to impairments in muscle force production and cardiac function that, in turn, limit performance in activities essential to everyday living. The purposes of this study were: (1) to identify the "breakpoint" or threshold of maximal voluntary performance and performance,in ordinary daily function and (2) to evaluate the predictive validity of the threshold to identify the ability. to live independently without self-reported functional limitation. Subjects and Methods. Men and women (N=192; mean age=76 years, SD=7, range=65-97) were recruited from single-family community dwellings or retirement communities with multiple levels of care. Physical function was measured with the Continuous-Scale Physical Functional Performance Test (CS-PFP). Maximal voluntary performance measures included peak oxygen consumption ((V)over dot(2peak)) and isokinetic knee extensor torque (KET). Segmented linear regression models of the CS-PFP on the physical performance measures were used to determine the threshold values and their confidence intervals. A logistic regression model was used to evaluate the ability of the CS-PFP scores to identify those living independently and to further illustrate the concepts of threshold and physical reserve. Results. Threshold values identified for (V) over dot O-2peak (20 mL.kg(-1).min(-1)) and KET (2.5 N.m/[kg.m(-1)]) were associated with an average of CS-PFP score of 57 units. The threshold accurately predicted individuals reporting functional limitations. Discussion and Conclusion.. The thresholds provide a mechanism for easily estimating an individual's physical reserve, predicting dependency in living status, and providing unbiased guidance for intervention in late-life independence.