1Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UNITED KINGDOM; 2Health and Social Care Institute, Teesside University, Middlesbrough, UNITED KINGDOM; 3Department of Sports and Exercise Sciences, Chester University, Chester, UNITED KINGDOM; 4Department of Health Sciences, Liverpool Hope University, Liverpool, UNITED KINGDOM; 5College of Engineering, Swansea University, Swansea, UNITED KINGDOM; and 6School of Sport Science, Exercise and Health, University of Western Australia, Perth, AUSTRALIA.
Med Sci Sports Exerc. 2013 Dec;45(12):2341-5. doi: 10.1249/MSS.0b013e31829bfa79.
We aimed to compare three candidate body size index models for the scaling of aerobic fitness (V(˙)O(2peak)) in children: whole body mass, total lean body mass, and the lean mass of both legs.
V(˙)O(2peak) and total lean mass of the body and both legs (via dual-energy x-ray absorptiometry) were assessed in 126 girls and 87 boys aged 9-11 yr. We applied nonlinear allometric models of the form V(˙)O(2peak) = a×body size, adjusted for biological sex and maturity offset (years from peak height velocity). We assessed goodness of fit using the Akaike information criterion.
The Akaike weights (Akaike differences) were as follows: lean mass of both legs = 0.69 (0), total lean body mass = 0.31 (1.6), and whole body mass = <1e-8 (36.6). The size exponent (90% confidence interval) for the lean mass of both legs was 0.55 (0.46-0.64). V(˙)O(2peak) was 17% (13%-21%) lower in girls after controlling for the lean mass of both legs and maturity offset. After controlling for body size and sex, a 1-yr increase in maturity offset (closer to peak height velocity) was associated with a 6% (4%-9%) higher V(˙)O(2peak).
Allometric scaling of V(˙)O(2peak) by the lean mass of both legs provides the best model for quantifying growth-related changes in aerobic fitness in pediatric populations, although this model is only marginally superior to the total lean body mass model. There is no support for the total body mass model. Maturity and sex are also important covariates exerting a size-independent influence on peak aerobic fitness.
我们旨在比较三种候选体型指数模型，用于儿童有氧适能（V(˙)O(2peak)）的比例缩放：全身质量、总去脂体重和双腿去脂质量。
通过双能 X 射线吸收法评估了 126 名 9-11 岁女孩和 87 名男孩的 V(˙)O(2peak)峰值和身体及双腿的总去脂体重。我们应用了非线性异速模型，形式为 V(˙)O(2peak) = a×身体大小，调整了生物学性别和成熟度偏移（从身高峰值速度的年数）。我们使用赤池信息量准则评估了拟合优度。
赤池权重（赤池差异）如下：双腿去脂质量=0.69（0）、总去脂体重=0.31（1.6）和全身质量=＜1e-8（36.6）。双腿去脂质量的尺寸指数（90%置信区间）为 0.55（0.46-0.64）。在控制双腿去脂质量和成熟度偏移后，女孩的 V(˙)O(2peak)低 17%（13%-21%）。在控制身体大小和性别后，成熟度偏移（更接近身高峰值速度）增加 1 年，与 V(˙)O(2peak)升高 6%（4%-9%）相关。
通过双腿去脂质量对 V(˙)O(2peak)进行异速缩放为量化儿科人群有氧适能的生长相关变化提供了最佳模型，尽管该模型仅略优于总去脂体重模型。没有支持全身质量模型的证据。成熟度和性别也是对峰值有氧适能施加独立大小影响的重要协变量。
