Beunen G P, Rogers D M, Woynarowska B, Malina R M
Katholieke Universiteit Leuven, Belgium.
Ann Hum Biol. 1997 Jan-Feb;24(1):33-43. doi: 10.1080/03014469700004752.
The utility of removing the confounding effect of body mass on oxygen uptake by simply dividing the measured values by mass has been questioned: Allometric transformation or calculation of covariance analysis have been proposed as more appropriate alternatives. This study hypothesized that scaling factors for individual youths differ with maturity status. Peak oxygen uptake (peak VO2) during exercise on a bicycle ergometer, stature and body mass were measured at annual intervals in 47 active boys and 31 active girls from 11 to 14 years of age. All subjects attended sport schools during the study. The children were classified into two maturity categories, early and average (for the sake of sample size and consistency between sexes), and late on the basis of individual stature velocities in boys and age at menarche in girls. Individual data for peak VO2 were normalized for differences in body mass by double logarithmic transformation and regression analysis (ontogenetic allometry). Individual allometric coefficients (mean +/- SD) for boys showing a good fit were, respectively, 0.799 +/- 0.239 and 0.536 +/- 0.141 in early and average maturing boys combined and in late maturing boys. Logarithmic transforms of VO2 and mass were highly related (r > 0.90) in 10 of 16 early and average maturers, and in 18 of 31 late maturers. Corresponding individual allometric coefficients in girls were more variable, and the logarithmic transforms of VO2 and mass were not highly related (r < 0.70). Similar results were obtained for the relationships between the logarithmic transforms of VO2 and stature. The evidence thus suggests that in boys scaling VO2 for body mass varies with maturity status of the individual, and that there is considerable inter-individual variation in scaling coefficients during early and mid-adolescence. The increase in peak VO2 in active girls 11-14 years is not related to the increase in body mass or stature in the majority.
异速生长转换或协方差分析计算已被提议作为更合适的替代方法。本研究假设个体青少年的缩放因子随成熟状态而不同。对47名11至14岁的活跃男孩和31名活跃女孩，每年测量一次他们在自行车测力计上运动时的峰值摄氧量（峰值VO₂）、身高和体重。在研究期间，所有受试者都就读于体育学校。根据男孩的个体身高速度和女孩的初潮年龄，将儿童分为早熟和平均成熟（出于样本量和性别间一致性的考虑）以及晚熟两类。通过双对数转换和回归分析（个体发育异速生长）对峰值VO₂的个体数据进行体重差异归一化。在早熟和平均成熟男孩合并组以及晚熟男孩中，拟合良好的男孩个体异速生长系数（均值±标准差）分别为0.799±0.239和0.536±0.141。在16名早熟和平均成熟者中的10名以及31名晚熟者中的18名中，VO₂和体重的对数转换高度相关（r>0.90）。女孩相应的个体异速生长系数更具变异性，VO₂和体重的对数转换相关性不高（r<0.70）。VO₂和身高的对数转换之间的关系也得到了类似结果。因此，证据表明在男孩中，VO₂随体重的缩放因子随个体成熟状态而变化，并且在青春期早期和中期，缩放系数存在相当大的个体间差异。11至14岁活跃女孩的峰值VO₂增加与大多数人的体重或身高增加无关。
