Effects of the amount of exercise on body weight, body composition, and measures of central obesity - STRRIDE - A randomized controlled study
Effects of the amount of exercise on body weight, body composition, and measures of central obesity - STRRIDE - A randomized controlled study
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DOI：
10.1001/archinte.164.1.31
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发表时间：
2004-01-12
影响因子：
--
通讯作者：
Kraus, WE
中科院分区：
文献类型：
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作者：
Slentz, CA;Duscha, BD;Kraus, WE
背景：肥胖是一个主要的健康问题，部分原因是缺乏身体活动。预防体重增加所需的活动量尚不清楚。目的：确定不同运动量和强度的运动训练效果。设计：随机对照试验（1999年2月至2002年7月）。从北卡罗来纳州达勒姆和周边社区招募了40-65岁的轻度至中度血脂异常患者。8个月的运动计划，分为3组：（1）高运动量/剧烈强度（热量相当于每周慢跑约20英里[32.0公里]，峰值耗氧量为65%-80%）;（2）低量/剧烈强度（相当于每周慢跑约12英里[19.2公里]，65%-80%），以及（3）低量/中等强度（相当于40%-55%时每周步行约12英里[19.2公里]）。受试者被劝告不要改变他们的饮食，并鼓励保持体重。主要结果测量：体重，身体成分（通过皮褶），腰围。结果：在筛选的302名受试者中，182名符合标准并被随机分配，120名完成了研究。运动量与体重减轻量和脂肪量减少量之间存在显著（P <0.05）剂量反应关系。高量/高强度组的体重下降明显更多（平均[SD] kg）和脂肪量（平均值[SD]公斤）（分别为-2.9 [2.8]和-4.8 [3.0]）（分别为-0.9 [1.8]和-2.0 [2.6]），低量/高强度组（分别为-0.6 [2.0]和-2.5 [3.4]）和对照组（分别为+1.0 [2.1]和+0.4 [3.0]）。两个低剂量组的改善明显大于对照组，但彼此没有差异。与对照组相比，所有运动组的腹围、最小腰围和臀围测量值均显著降低。有没有显着的变化，饮食摄入量为任何group.Conclusions：在nondieting，超重的受试者，控制体重增加，低量运动组失去了体重和脂肪，和高量组失去了更多的每一个剂量反应的方式。这些发现强烈表明，在饮食不发生变化的情况下，维持体重需要更高的活动量，并且在超重对照组中观察到的正热量失衡很小，可以通过适量的运动来逆转。大多数人可以通过每天步行30分钟来实现这一目标。
Background: Obesity is a major health problem due, in part, to physical inactivity. The amount of activity needed to prevent weight gain is unknown.Objective: To determine the effects of different amounts and intensities of exercise training.Design: Randomized controlled trial (February 1999-July 2002).Setting and Participants: Sedentary, overweight men and women (aged 40-65 years) with mild to moderate dyslipidemia were recruited from Durham, NC, and surrounding communities.Interventions: Eight-month exercise program with 3 groups: (1) high amount/vigorous intensity (calorically equivalent to approximately 20 miles [32.0 km] of jogging per week at 65%-80% peak oxygen consumption); (2) low amount/vigorous intensity (equivalent to approximately 12 miles [19.2 km] of jogging per week at 65%-80%), and (3) low amount/moderate intensity (equivalent to approximately 12 miles [19.2 km] of walking per week at 40%-55%). Subjects were counseled not to change their diet and were encouraged to maintain body weight.Main Outcome Measures: Body weight, body composition (via skinfolds), and waist circumference. Results: Of 302 subjects screened, 182 met criteria and were randomized and 120 completed the study. There was a significant (P < .05) dose-response relationship between amount of exercise and amount of weight loss and fat mass loss. The high-amount/vigorous-intensity group lost significantly more body mass (in mean [SD] kilograms) and fat mass (in mean [SD] kilograms) (-2.9 [2.8] and -4.8 [3.0], respectively) than the low-amount/moderate-intensity group (-0.9 [1.8] and -2.0 [2.6], respectively), the low-amount/vigorous-intensity group (-0.6 [2.0] and -2.5 [3.4], respectively), and the controls (+1.0 [2.1] and +0.4 [3.0], respectively). Both low-amount groups had significantly greater improvements than controls but were not different from each other. Compared with controls, all exercise groups significantly decreased abdominal, minimal waist, and hip circumference measurements. There were no significant changes in dietary intake for any group.Conclusions: In nondieting, overweight subjects, the controls gained weight, both low-amount exercise groups lost weight and fat, and the high-amount group lost more of each in a dose-response manner. These findings strongly suggest that, absent changes in diet, a higher amount of activity is necessary for weight maintenance and that the positive caloric imbalance observed in the over-weight controls is small and can be reversed by a modest amount of exercise. Most individuals can accomplish this by walking 30 minutes every day.