Obesity：举重训练相比有氧锻炼或更有效控制个体腹部肥胖

  近日，来自哈佛大学公共卫生学院的研究人员通过研究表示，每天进行20分钟举重训练的健康男性相比花费相同时间进行有氧代谢活动的男性而言因年龄增长引发的腹部肥胖的可能性或许更小一些；相关研究刊登于国际杂志Obesity上。

  将举重训练和有氧代谢活动结合起来或许是控制腹部肥胖的最佳方法，研究者Rania Mekary说道，由于年龄往往和肌肉减少症直接相关，而肌肉减少直接引发骨骼肌含量的下降，而仅依赖于机体自身的体重对于维持健康的老龄化机体是不充足的。对腰围的测定是维持包括成年个体在内的机体健康的重要指示器，参与耐力训练，并且结合有氧锻炼可以帮助成年个体减少腹部脂肪，并且增加或者保持肌肉量。

  此前研究中研究者重点对超重或者2型糖尿病特殊人群进行研究，而本文研究中研究者重点对较广BMI范围的健康男性的大样本进行研究。文章中研究人员对在1996年至2008年间40岁及以上的10500名健康的美国男性进行研究，对这些参与对象的体力活动、腰围及体重进行研究测定；其中研究人员对参与个体12年周期内参与者的活动水平的改变进行分析，来观察那些机体活动对男性的腰围影响最大，结果显示，相比每天花费20分钟进行适度至剧烈有氧训练活动的男性个体而言，每天花费相同时间进行举重训练的男性个体的腰围增加程度较小；而个体如果有静坐习惯，比如看电视的话就会使其腰围的尺寸增加过快。

  最后研究者表示，本文研究重点强调了举重训练对于减少个体腹部肥胖的重要性，尤其是针对老年个体，为了维持一个健康的体重及腰围，举重训练或许更优于有氧锻炼。（转化医学网360zhyx.com）

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Weight training, aerobic physical activities, and long-term waist circumference change in men
Obesity DOI: 10.1002/oby.20949
Rania A. Mekary1,2,*, Anders Grøntved1,3, Jean-Pierre Despres4, Leandro Pereira De Moura5,6, Morteza Asgarzadeh1, Walter C. Willett1,7,8, Eric B. Rimm1,7,8, Edward Giovannucci1,7,8 andFrank B. Hu1,7,8
Objective
Findings on weight training and waist circumference (WC) change are controversial. This study examined prospectively whether weight training, moderate to vigorous aerobic activity (MVAA), and replacement of one activity for another were associated with favorable changes in WC and body weight (BW).
Methods
Physical activity, WC, and BW were reported in 1996 and 2008 in a cohort of 10,500 healthy U.S. men in the Health Professionals Follow-up Study. Multiple linear regression models (partition/substitution) to assess these associations were used.
Results
After adjusting for potential confounders, a significant inverse dose-response relationship between weight training and WC change (P-trend <0.001) was observed. Less age-associated WC increase was seen with a 20-min/day activity increase; this benefit was significantly stronger for weight training (−0.67 cm, 95% CI −0.93, −0.41) than for MVAA (−0.33 cm, 95% CI −0.40, −0.27), other activities (−0.16 cm, 95% CI −0.28, −0.03), or TV watching (0.08 cm, 95% CI 0.05, 0.12). Substituting 20 min/day of weight training for any other discretionary activity had the strongest inverse association with WC change. MVAA had the strongest inverse association with BW change (−0.23 kg, 95% CI −0.29, −0.17).
Conclusions
Among various activities, weight training had the strongest association with less WC increase. Studies on frequency/volume of weight training and WC change are warranted.