Fatigability as a function of physical activity energy expenditure in older adults
Fatigability as a function of physical activity energy expenditure in older adults
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DOI：
10.1007/s11357-011-9338-x
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发表时间：
2013-02-01
期刊：
影响因子：
--
通讯作者：
Shnelle, John F.
中科院分区：
文献类型：
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作者：
Buchowski, Maciej S.;Simmons, Sandra F.;Shnelle, John F.
疲劳增加是老年人发病率和死亡率的预测因素。疲劳性定义了身体活动 (PA) 导致的表现或自我报告的疲劳变化。然而，疲劳性与 PA 相关能量消耗 (PAEE) 的关系尚不清楚。研究人员同时测量了 17 名成年人（11 名女性，74-94 岁）的表现、疲劳和能量消耗的变化，他们在全房间间接量热计中执行八项标准化 PA 任务，满足不同的能量消耗需求。使用 PA 运动监测器客观地测量表现变化，并针对每项任务按七分制自我报告疲劳变化。表现和感知疲劳严重程度评分分别计算为表现和疲劳变化的比率以及 PAEE。我们发现，在需要相对较高水平能量消耗的任务中，客观表现和自我报告疲劳的变化都与能量消耗相关（分别为 Spearman rho = -0.72 和 -0.68，p < 0.001）。在此任务中，表现和感知疲劳严重程度评分显着相关（rho = 0.77，p < 0.001）。总之，这项概念验证试点研究的结果表明，在需要相对较高水平能量消耗的任务中，感知疲劳严重程度分数和表现疲劳严重程度分数都与 PAEE 引起的疲劳相关。我们的结论是，疲劳严重程度是老年人 PAEE 引起的疲劳的有效衡量标准。
Increased fatigue is a predictor of morbidity and mortality in older adults. Fatigability defines a change in performance or self-reported fatigue in response to physical activity (PA). However, the relationship of fatigability to PA-related energy expenditure (PAEE) is unknown. Changes in performance, fatigue, and energy expenditure were measured simultaneously in 17 adults (11 females, 74-94 years old) performing eight standardized PA tasks with various energy expenditure requirements in a whole-room indirect calorimeter. Change in performance was objectively measured using a PA movement monitor and change in fatigue was self-reported on a seven-point scale for each task. Performance and perceived fatigability severity scores were calculated as a ratio of change in performance and fatigue, respectively, and PAEE. We found that change in both objective performance and self-reported fatigue were associated with energy expenditure (Spearman rho = -0.72 and -0.68, respectively, p < 0.001) on a task requiring relatively high level of energy expenditure. The performance and perceived fatigability severity scores were significantly correlated (rho = 0.77, p < 0.001) on this task. In summary, results of this proof of concept pilot study show that both perceived and performance fatigability severity scores are related to PAEE-induced fatigue on a task requiring relatively high level of energy expenditure. We conclude that fatigability severity is a valid measure of PAEE-induced fatigue in older adults.