Bastone Alessandra de Carvalho, Ferriolli Eduardo, Teixeira Claudine Patricia, Dias João Marcos Domingues, Dias Rosângela Corrêa
Dept of Physical Therapy, Federal University of Vales do Jequitinhonha e Mucuri, Diamantina, MG, Brazil.
J Phys Act Health. 2015 Sep;12(9):1304-11. doi: 10.1123/jpah.2014-0290. Epub 2014 Nov 19.
Self-reported measures of decreased aerobic fitness and low physical activity are criteria of frailty. However, research assessing aerobic fitness and physical activity levels associated with frailty is limited. Therefore, the aims of this study were to objectively assess the aerobic fitness and the physical activity level of frail and nonfrail elderly, and to examine the association between frailty, aerobic fitness and habitual physical activity.
This study included 26 elderly (66 to 86 years), randomly selected. The groups (frail/nonfrail) were age and sex paired. Peak oxygen consumption, maximal walking distance and speed were assessed during the incremental shuttle walk test (ISWT). Average daily time spent in sedentary, light, moderate and hard activity, counts, number of steps and energy expenditure were measured by accelerometry.
All variables measured by the ISWT and accelerometer differed significantly between the groups (P < .02). All aerobic fitness and physical activity variables were significantly associated with frailty, independent of the number of chronic health conditions (P < .05).
Frailty is associated with low peak oxygen consumption and low physical activity level. These findings could guide future clinical trials designed to evaluate the efficacy of aerobic exercises in the prevention and treatment of frailty.
自我报告的有氧适能下降和低体力活动是衰弱的标准。然而，评估与衰弱相关的有氧适能和体力活动水平的研究有限。因此，本研究的目的是客观评估衰弱和非衰弱老年人的有氧适能和体力活动水平，并研究衰弱、有氧适能和习惯性体力活动之间的关联。
本研究纳入了随机选取的26名老年人（66至86岁）。两组（衰弱/非衰弱）在年龄和性别上进行了配对。在递增往返步行试验（ISWT）期间评估峰值耗氧量、最大步行距离和速度。通过加速度计测量久坐、轻度、中度和剧烈活动的平均每日时长、计数、步数和能量消耗。
两组之间通过ISWT和加速度计测量的所有变量均存在显著差异（P < .02）。所有有氧适能和体力活动变量均与衰弱显著相关，与慢性健康状况的数量无关（P < .05）。
衰弱与低峰值耗氧量和低体力活动水平相关。这些发现可为未来旨在评估有氧运动在预防和治疗衰弱方面疗效的临床试验提供指导。
