Abstract
We assessed whether body composition changes with 9 months of exercise training predicted changes in cardiometabolic health indices in weight-stable adults. We hypothesized that within ±5% weight change, changes in whole-body fat and lean masses would predict changes in cardiometabolic health indices with exercise training. Using a randomized parallel design, 152 adults (age: 49 ± 8 year; body mass index: 30.0 ± 2.7 kg/m; mean ± SD) performed resistance exercises 2 d/wk and aerobic exercises 1 d/wk for 9 months. Participants consumed isoenergetic supplements with 0, 10, 20, or 30 g whey protein twice daily and remained weight stable within ±5% of baseline weight. Body weight and composition were measured using dual-energy x-ray absorptiometry pre- and postintervention. Multiple linear regression model was applied for data analyses. Independent of whey protein supplementation, reductions in fat mass predicted increases in high-density lipoprotein cholesterol (unstandardized beta-coefficient [β], -0.03; 95% confidence interval [CI], -0.06 to -0.01; P = .007) and insulin sensitivity index (β, -0.52; 95% CI, -0.95 to -0.09; P = .018) and decreases in waist circumference (β, 0.67; 95% CI, 0.17-1.18; P = .009). In contrast, increases in lean mass did not predict changes in any of the measured cardiometabolic health indices. Health improvements with training that emphasize resistance exercises are typically attributed to increases in lean mass; however, these results underscore reducing body fat to predict cardiometabolic health improvements.
摘要
我们评估了 9 个月的运动训练引起的身体成分变化是否能预测体重稳定成年人的心血管代谢健康指数的变化。我们假设在体重变化±5%的范围内,全身脂肪和瘦体重的变化将预测运动训练对心血管代谢健康指数的变化。采用随机平行设计,152 名成年人(年龄:49±8 岁;体重指数:30.0±2.7kg/m;平均值±标准差)每周进行 2 天的抗阻运动和 1 天的有氧运动,共 9 个月。参与者每天两次摄入含有 0、10、20 或 30g 乳清蛋白的等能量补充剂,并且体重在±5%的基线体重范围内保持稳定。在干预前后使用双能 X 射线吸收法测量体重和身体成分。应用多元线性回归模型进行数据分析。独立于乳清蛋白补充剂,脂肪量的减少预测高密度脂蛋白胆固醇(未标准化β系数[β],-0.03;95%置信区间[CI],-0.06 至-0.01;P=0.007)和胰岛素敏感指数(β,-0.52;95%CI,-0.95 至-0.09;P=0.018)的增加以及腰围的减少(β,0.67;95%CI,0.17-1.18;P=0.009)。相反,瘦体重的增加并不能预测任何测量的心血管代谢健康指数的变化。强调抗阻运动的训练所带来的健康改善通常归因于瘦体重的增加;然而,这些结果强调了减少体脂以预测心血管代谢健康的改善。
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网址: 在体重稳定的成年人中,全身脂肪量的减少而不是瘦体重的增加可预测运动训练对心血管代谢健康指标的变化。 https://m.trfsz.com/newsview1829426.html