心肺适能
身体素质
自感劳累评分
单调的工作
混淆
医学
心理学
老年学
物理疗法
心率
血压
内科学
作者
Kyle Moored,Yujia Qiao,Andrea Rosso,Frederico G S Toledo,Peggy M. Cawthon,Steven R. Cummings,Bret H Goodpaster,Stephen B. Kritchevsky,Nancy W. Glynn
出处
期刊:The Journals of Gerontology
[Oxford University Press]
日期:2023-01-30
卷期号:78 (8): 1392-1401
被引量:2
标识
DOI:10.1093/gerona/glad037
摘要
Abstract Background Cardiorespiratory fitness and perceived fatigability are interrelated components of physical capacity that may jointly influence movement within one’s living environment (life-space mobility). We examined whether fitness and fatigability were associated with life-space mobility in community-dwelling older adults, and whether the association of fitness with life-space varied by the level of perceived fatigability. Methods Participants were from the Study of Muscle, Mobility and Aging (SOMMA) baseline cohort (N = 775, mean age 76.1 years). Life Space Assessment scores incorporated level, frequency, and assistance used (personal, devices) for life-space mobility. Fitness was measured as VO2peak from symptom-limited treadmill testing. Fatigability cut-points included: (i) Borg Rating of Perceived Exertion (RPE) ≥ 10 after a fixed-speed (1.5 mph) treadmill test, (ii) the Pittsburgh Fatigability Scale (PFS) Physical ≥ 15, and (iii) PFS Mental ≥ 13. The total count of cut-points was used as a composite fatigability measure (range: 0–3). Linear regressions were adjusted for demographic, lifestyle, and health confounders. Results Better fitness was associated with greater life-space, but the association plateaued at higher fitness levels (VO2peak > 18). Life-space was significantly lower for individuals meeting ≥2 fatigability criteria (vs none), attributable mainly to more severe physical, but not mental, fatigability. In moderation analyses, the fitness–life-space association was significant only for those with RPE ≥ 10 but did not differ by PFS. Conclusion Fitness below a critically low threshold was associated with limited life-space mobility, suggesting that certain older individuals may need to operate close to their maximum aerobic capacity to traverse daily environments; these associations were driven by those with more severe physical fatigability.
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