Comparison between two models of training with regard to resting energy expenditure and body composition in obese adolescents

Abstract Different types of physical activity programs have been used with the purpose of improving body composition and increasing resting energy expenditure (REE) in obese adolescents. The aim of the present study was to compare the effects of two training models on REE and body composition in this population. The study included 20 obese male adolescents, who were randomly assigned to follow two training models: strength training (n=8, age=13,4±1.0) and functional training (n=12, age= 13.0±1.1). Body composition variables were estimated by dual-energy X-ray absorptiometry. REE was assessed by indirect calorimetry using the QUARK-PFT equipment (COSMED, Rome, Italy). The training protocol consisted of 30 minutes of aerobic training followed by 30 minutes of strength training (ST) or functional training (FT), both with a duration of 20 weeks. There were no significant differences between the two training models with regard to body composition (fat mass, FT= -7.6±5.5% vs. ST= -8.9±6.2%; p=0.620), (lean body mass, FT= 9.0±5.3% vs. ST= 6.8±6.7%; p=0.431) and to REE (FT= 19.6±15.3% vs. ST= 10.7±24.5%; p=0.331). Moreover, lean body mass (p=0.01) and fat mass (0.01) had an influence on REE. No differences were observed between the two training models, but both were effective in improving body composition and increasing REE in obese adolescents. Furthermore, the present study showed the importance of systematic physical training, since lean body mass and fat mass contributed to the increase in REE after the training period.

摘要 为改善肥胖青少年的身体成分并提升其静息能量消耗（resting energy expenditure，REE），已有多种身体活动方案被应用于该人群。本研究旨在比较两种训练模式对该人群REE与身体成分的影响。本研究纳入20名肥胖男性青少年，将其随机分配至两组：力量训练组（n=8，年龄13.4±1.0岁）与功能训练组（n=12，年龄13.0±1.1岁）。身体成分相关指标采用双能X线吸收法（dual-energy X-ray absorptiometry）进行测算；静息能量消耗（REE）采用间接测热法，通过QUARK-PFT设备（COSMED，意大利罗马）完成评估。本研究的训练方案为：先进行30分钟有氧训练，随后开展30分钟力量训练（strength training，ST）或功能训练（functional training，FT），两组训练周期均为20周。结果显示，两组训练模式在身体成分指标[体脂量：功能训练组为-7.6±5.5%，力量训练组为-8.9±6.2%；p=0.620]、去脂体重[功能训练组为9.0±5.3%，力量训练组为6.8±6.7%；p=0.431]以及REE[功能训练组为19.6±15.3%，力量训练组为10.7±24.5%；p=0.331]方面均无显著统计学差异。此外，去脂体重（p=0.01）与体脂量（p=0.01）均对REE存在显著影响。尽管两组训练模式间未观察到显著差异，但二者均能有效改善肥胖青少年的身体成分并提升其REE。进一步而言，本研究证实了系统性身体训练的重要性：训练周期结束后，去脂体重与体脂量的变化均会促使REE升高。