Abstract：
Most of the evidence on physical activity for maintaining a healthy weight in adolescents is based solely on aerobic physical activity alone, with little attention given to the muscle strength component. This study aimed to investigate the associations between aerobic activities and muscle-strengthening activities (MSA) and overweight/obesity among a representative sample of adolescents. Data from the United States-based Youth Risk Behavior Surveillance System for the 2011-2019 cycle were used in this cross-sectional study. Adolescents self-reported their adherence to aerobic and MSA guidelines, as well as their height and weight. Overweight and obesity were defined using the age- and sex-specific criteria of the Centers for Disease Control and Prevention, with a body mass index (BMI) ≥85th and ≥95th percentiles, respectively. We examined the associations between adherence to physical activity guidelines (reference: not meeting either of the physical activity guidelines) and overweight/obesity or obesity using binary logistic regressions. These analyses were adjusted for race/ethnicity, sex, age, screen time, sleep duration, tobacco, alcohol, fruit, vegetables, and soda consumption. A total of 42 829 adolescents (48.98% girls) were included in the study. Of these, 22.23% met both guidelines for physical activity, 30.47% had overweight/obesity, and 14.51% had obesity. Compared with meeting neither guideline, meeting both aerobic and MSA guidelines was associated with lower odds of having overweight/obesity (odds ratio [OR] = 0.64, 95% confidence interval [CI], 0.60 to 0.68) and obesity (OR = 0.52, 95% CI 0.48 to 0.56). These results were consistent across years of assessment, sex, and race/ethnicity. In conclusion, our results highlight the importance of MSA, which is often overlooked in physical activity recommendations in many studies, in combating childhood obesity in the United States.
摘要：
关于青少年保持健康体重的体育锻炼的大多数证据仅基于有氧体育锻炼，很少关注肌肉力量。这项研究旨在调查有代表性的青少年样本中有氧活动和肌肉强化活动（MSA）与超重/肥胖之间的关联。这项横断面研究使用了2011-2019年美国青年风险行为监测系统的数据。青少年自我报告他们遵守有氧和MSA指南，以及他们的身高和体重。超重和肥胖是使用疾病控制和预防中心的年龄和性别特异性标准定义的，体重指数（BMI）≥85百分位数和≥95百分位数，分别。我们使用二元逻辑回归分析了遵守体力活动指南（参考：不符合任何一项体力活动指南）与超重/肥胖或肥胖之间的关联。这些分析针对种族/民族进行了调整，性别,年龄,屏幕时间,睡眠持续时间,烟草,酒精,水果,蔬菜,和苏打水消费。共有42829名青少年（48.98％的女孩）被纳入研究。其中,22.23%的人符合体育活动的两个指导方针，30.47%的人超重/肥胖，14.51%有肥胖。与两者都不符合准则相比，符合有氧和MSA指南与超重/肥胖的几率较低相关(比值比[OR]=0.64，95%置信区间[CI]，0.60至0.68）和肥胖（OR=0.52，95%CI0.48至0.56）。这些结果在评估的年份中是一致的，性别,和种族/民族。总之,我们的结果强调了MSA的重要性，这在许多研究的建议中经常被忽视，在美国与儿童肥胖作斗争。
