Davis Jaimie N, Hodges Valerie A, Gillham M Beth
Department of Human Ecology, University of Texas, Austin, Texas, USA.
Obesity (Silver Spring). 2006 Dec;14(12):2259-65. doi: 10.1038/oby.2006.265.
Comparisons of physical activity measured by accelerometers in overweight/obese adults and their normal-weight counterparts are limited. Compliance with the 2002 Institute of Medicine (IOM) exercise recommendations for 60 minutes of moderate-intensity exercise daily has not been reported. The purpose of this study was to compare physical activity, as measured by accelerometers, in overweight/obese adults vs. normal-weight controls and to assess compliance with recommendations for physical activity by the IOM in 2002 and by the Centers for Disease Control and Prevention and American College of Sports Medicine in 1995 for 30 minutes of moderate-intensity activity, preferably all days of the week.
Sixty-two overweight/obese subjects, BMI > or = 25, included 31 adults, 12 men and 19 women, 25 to 69 years old, and their normal-weight controls, BMI 18.5 to 24.9, matched for gender, age, and height. Body composition was assessed using DXA. Physical activity was measured with Actigraph accelerometers (MTI, Fort Walton Beach, FL) worn by each participant for 7 consecutive days.
Accelerometry data indicated that overweight/obese adults recorded approximately 60 counts per minute less per day and spent 21 minutes less engaged in moderate or greater intensity activity than their normal-weight counterparts. Although 71% to 94% of those studied met 1995 recommendations, only 13% of overweight/obese subjects and 26% of normal-weight participants met 2002 exercise recommendations.
These results suggest that daily minutes spent in moderate-intensity activity or greater are associated with weight status and that the 2002 IOM recommendations may be difficult to meet even for normal-weight individuals.
通过加速度计测量超重/肥胖成年人与其体重正常的同龄人之间身体活动情况的比较有限。尚未有关于是否符合2002年医学研究所（IOM）每日进行60分钟中等强度运动建议的报告。本研究的目的是比较通过加速度计测量的超重/肥胖成年人与体重正常的对照组之间的身体活动情况，并评估是否符合IOM在2002年以及疾病控制与预防中心和美国运动医学学院在1995年提出的进行30分钟中等强度活动（最好每周每日进行）的身体活动建议。
62名超重/肥胖受试者，BMI≥25，包括31名成年人，12名男性和19名女性，年龄在25至69岁之间，以及他们体重正常的对照组，BMI为18.5至24.9，在性别、年龄和身高方面进行了匹配。使用双能X线吸收仪（DXA）评估身体成分。每位参与者连续佩戴Actigraph加速度计（MTI，佛罗里达州沃尔顿堡滩）7天来测量身体活动情况。
加速度计数据表明，超重/肥胖成年人每天每分钟记录的活动计数比体重正常的同龄人少约60次，且进行中等强度或更高强度活动的时间少21分钟。尽管71%至94%的研究对象符合1995年的建议，但只有13%的超重/肥胖受试者和26%的体重正常参与者符合2002年的运动建议。
这些结果表明，每天进行中等强度活动或更高强度活动的分钟数与体重状况有关，并且即使对于体重正常的个体，2002年IOM的建议也可能难以达到。
