Cardiopulmonary exercise testing in children and adolescents with high body mass index

Abstract

© 2016 Human Kinetics, Inc.Consensus has yet to be achieved on whether obesity is inexorably tied to poor fitness. We tested the hypothesis that appropriate reference of cardiopulmonary exercise testing variables to lean body mass would eliminate differences in fitness between high-BMI and normal-BMI, otherwise-healthy children and adolescents typically seen when referencing body weight. We measured body composition with dual X-ray absorptiometry and CPET variables from cycle ergometry using both peak values and submaximal exercise slopes. In contrast to our hypothesis, referencing to LBM tended to lessen, but did not eliminate, the differences in males and females;.WR/.HR differed between the two groups in females but not males. The mean percent predicted values for all CPET variables were below 100% in the high-BMI group. The pattern of CPET abnormalities suggested a pervasive impairment of O2 delivery in the high-BMI group. Tailoring lifestyle interventions to the specific fitness capabilities of each child may be one of the ways to stem what has been an intractable epidemic.

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