The interaction of obesity and puberty on substrate utilization during exercise: A gender comparison

Robert G. McMurray, Peter A. Hosick

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

The study evaluated the interactions of puberty and obesity on substrate oxidation of overweight girls (n = 38) and boys (N = 35; BMI > 85th percentile) matched for gender, age, and puberty (pre/pubertal) with normal weight girls and boys. Metabolic rates (VO2) were obtained during rest and at 4, 5.6 and 8 k/h. Carbohydrate oxidation rates (mg/kgFFM/min) adjusted for % predicted VO2max, were higher for prepubertal OW children than pubertal children (p <.03). Fat oxidation rates were higher for NW prepubertal boys compared with other boys. Results indicate that OW children, regardless of gender or pubertal status, increase their carbohydrate oxidation rate to compensate for higher than normal metabolic rates. The effects of obesity on the substrate use is marginally related to puberty.

Original languageEnglish
Pages (from-to)411-431
Number of pages21
JournalPediatric Exercise Science
Volume23
Issue number3
DOIs
StatePublished - Aug 2011

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