Longitudinal analysis of scaling VO2 for differences in body size during puberty:: the Muscatine Study
Longitudinal analysis of scaling VO2 for differences in body size during puberty:: the Muscatine Study
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DOI：
10.1097/00005768-199809000-00014
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发表时间：
1998-09-01
期刊：
影响因子：
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通讯作者：
Mahoney, LT
中科院分区：
文献类型：
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作者：
Janz, KF;Burns, TL;Mahoney, LT
目的：本研究的目的是确定一种适当的方法，以“正常化”的摄氧量（V）超过点O-2）的身体尺寸的儿童和青少年。方法：我们检查了一个队列的126名儿童（基线平均年龄= 10.3岁）在5年的随访研究的异速生长比例因子。每年5年，我们测量峰值（V）超过点O-2，次最大（V）超过点O-2，体重，身高，身体成分和性成熟。我们将5年的数据集按硅岁成熟度和性别进行分类，然后使用广义估计方程法估计回归参数，该参数描述了对数转换体重对对数转换（V）对点O-2的影响。使用对数转换的远端游离体重（FFM）代替icg转换的体重重复所有分析。结果：使用FFM模型似乎更好地消除了身体大小对（V）的影响，而不是点O-2。在海湾的FFM指数为0.91的单变量模型和女孩的FFM指数为0.87的单变量模型令人满意的归一化峰（V）在点O-2但是，我们不能确定一个共同的身体大小指数为男孩和女孩。结论：结果支持使用的异速生长缩放（V）超过点O-2的功能FFM成熟的男孩和女孩，但表明成熟的影响（V）超过点O-2和身体大小之间的关系在男孩和女孩之间不同。
Purpose: The purpose of this study was to determine an appropriate method to "normalize" oxygen uptake (V) over dot O-2) for body size in children and adolescents. Methods: We examined allometric scaling factors for a cohort of 126 children (mean age at baseline = 10.3 yr) participating in a 5-yr follow-up study. Each year for 5 yr we measured peak (V) over dot O-2, submaximal (V) over dot O-2, body mass, height, body composition, and sexual maturation. We sorted the 5-yr data set by si sui maturation and gender and then used the generalized estimating equation method to estimate regression parameters that described the influence of log transformed body mass on log transformed (V) over dot O-2. All analyses were repeated using log transformed far-free body mass (FFM) in lieu of icg transformed body mass. Results: Models using FFM appeared better at eliminating the effect of body size on (V) over dot O-2. In bays a univariate model with a FFM exponent of 0.91 and in girls a univariate model with a FFM exponent of 0.87 satisfactorily normalized peak (V) over dot O-2 However we could not identify a common body size exponent for both boys and girls. Conclusions: Results support the use of allometric scaling of (V) over dot O-2 as a function of FFM for maturing boys and girls but indicate that the effects of maturation on the relationship between (V) over dot O-2 and body size differ between boys and girls.