Association of Breathing Reserve at Peak Exercise With Body Composition and Physical Function in Older Adults With Obesity.
Association of Breathing Reserve at Peak Exercise With Body Composition and Physical Function in Older Adults With Obesity.
复制标题
肥胖老年人高峰运动时的呼吸储备与身体成分和身体功能的关系。
DOI：
10.1093/gerona/gly276
复制
发表时间：
2019
期刊：
影响因子：
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通讯作者：
Nicklas,BarbaraJ
中科院分区：
文献类型：
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作者：
Opina,MariaTheresaD;Brinkley,TinaE;Gordon,Michelle;Lyles,MaryF;Nicklas,BarbaraJ
BackgroundAdiposity-related ventilatory constraints in older adults can potentially contribute to greater risk of exercise intolerance and mobility disability. This study investigated whether ventilatory limitation, measured by breathing reserve (BR) at peak exercise, is associated with body composition and physical function in older adults with obesity.MethodsThis study was a cross-sectional analysis of data from a community-based cohort (N= 177) of older men and women (65–79 years) with obesity (body mass index = 30–45 kg/m2). All participants underwent cardiopulmonary exercise testing on a treadmill, dual-energy X-ray absorptiometry for body composition, and physical function assessments. We examined relationships between BR and body composition and physical function using multiple linear regression and compared a subset with (BR ≤ 30%; BR-low;n= 56) and without (BR ≥ 45%; BR-high,n= 48) ventilatory limitation using unpaired Student’sttest and analysis of covariance.ResultsBR was inversely related to total body mass, lean mass, fat mass, % body fat, and waist circumference (p< 0.05 for all). BR was positively related to 400 m walk time (p= .006) and inversely related to usual gait speed (p= .05) and VO2peak (p< .0001), indicative of worse physical function. BR-low had greater adiposity, but also greater lean mass, higher VO2peak, and faster 400 m walk time, compared to BR-high (p< .05, for all).ConclusionsOlder adults with obesity who also have ventilatory limitation have overall higher measures of adiposity, but do not have lower peak exercise capacity or physical function. Thus, ventilatory limitation does not appear to be a contributing factor to obesity-related decrements in exercise tolerance or mobility.
