Aucouturier Julien, Lazaar Nordine, Doré Eric, Meyer Martine, Ratel Sebastien, Duché Pascale
Laboratory of Exercise Biology (BAPS), Unité de Formation et de Recherche en Sciences et Techniques des Activités Physiques et Sportives (UFRSTAPS), Blaise Pascal University, Clermont-Ferrand, France.
Appl Physiol Nutr Metab. 2007 Jun;32(3):367-71. doi: 10.1139/h06-114.
The purpose of this study was to investigate the possible effect of the difference in percentage body fat (%BF) and fat-free mass (FFM) on cycling peak power (CPP) in 6- to 8-year-old obese and lean untrained girls and boys. Obese (35 girls, 35 boys) and lean (35 girls, 35 boys) children were measured for obesity, %BF, calculated from skinfold measurements. FFM was calculated as body mass (BM) minus body fat. A force-velocity test on a cycle ergometer was used to measure CPP. CPP was related to anthropometric variables using standard and allometric models. CPP in absolute terms was higher in obese children than in lean children irrespective of gender. BM-related CPP was significantly lower in obese children than in lean ones, whereas no effect of obesity appeared on FFM-related CPP. Velocity at CPP (Vopt) was significantly lower and force at CPP (Fopt) was significantly higher in girls than in boys. Muscle power production was unaffected by obesity in children. Low BM-related CPP could explain the difficulty of taking up physical activities that are body-mass related in obese children. Gender difference for Vopt and Fopt shows that girls and boys may have different maturation patterns affecting CPP.
本研究的目的是调查体脂百分比（%BF）和去脂体重（FFM）差异对6至8岁肥胖和瘦的未受过训练的女孩和男孩骑行峰值功率（CPP）的可能影响。对肥胖儿童（35名女孩，35名男孩）和瘦儿童（35名女孩，35名男孩）进行肥胖测量，通过皮褶测量计算%BF。FFM计算为体重（BM）减去体脂。在自行车测力计上进行力-速度测试以测量CPP。使用标准模型和异速生长模型将CPP与人体测量变量相关联。无论性别如何，肥胖儿童的绝对CPP均高于瘦儿童。肥胖儿童中与BM相关的CPP显著低于瘦儿童，而肥胖对与FFM相关的CPP没有影响。女孩的CPP速度（Vopt）显著低于男孩，而女孩的CPP力（Fopt）显著高于男孩。儿童的肌肉力量产生不受肥胖影响。与BM相关的CPP较低可以解释肥胖儿童参与与体重相关的体育活动的困难。Vopt和Fopt的性别差异表明，女孩和男孩可能有不同的成熟模式影响CPP。
