Journal article
Longitudinal analysis of scaling VO2 for differences in body size during puberty : the Muscatine study
Medicine and science in sports and exercise, Vol.30(9), pp.1436-1444
1998
DOI: 10.1097/00005768-199809000-00014
PMID: 9741614
Abstract
Purpose: The purpose of this study was to determine an appropriate method to 'normalize' oxygen uptake (V̇O2) 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 V̇O2, submaximal V̇O2, body mass, height, body composition, and sexual maturation. We sorted the 5-yr data set by sexual 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 V̇O2. All analyses were repeated using log transformed fat-free body mass (FFM) in lieu of log transformed body mass. Results: Models using FFM appeared better at eliminating the effect of body size on V̇O2. In boys 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 V̇O2. However, we could not identify a common body size exponent for both boys and girls. Conclusions: Results support the use of allometric scaling of V̇O2 as a function of FFM for maturing boys and girls but indicate that the effects of maturation on the relationship between V̇O2 and body size differ between boys and girls.
Details
- Title: Subtitle
- Longitudinal analysis of scaling VO2 for differences in body size during puberty : the Muscatine study
- Creators
- K. F Janz - University of IowaT. L Burns - University of IowaJ. D Witt - Department of Sport, Health, and Leisure Studies, Department of Preventive Medicine and Environmental Health, and Department of Pediatrics, Division of Pediatric Cardiology, University of Iowa, Iowa City, IA 52242, United StatesL. T Mahoney - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Medicine and science in sports and exercise, Vol.30(9), pp.1436-1444
- Publisher
- Lippincott Williams & Wilkins
- DOI
- 10.1097/00005768-199809000-00014
- PMID
- 9741614
- ISSN
- 0195-9131
- eISSN
- 1530-0315
- Language
- English
- Date published
- 1998
- Academic Unit
- Stead Family Department of Pediatrics; Epidemiology; Fraternal Order of Eagles Diabetes Research Center; Health and Human Physiology
- Record Identifier
- 9984363629602771
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