Graded Exercise Testing in a Pediatric Weight Management Center: The DeVos Protocol

Abstract

Abstract

Background:

In this article, we describe a protocol used to test the functional capacity of the obese pediatric patient and describe the peak oxygen consumption (VO_2peak) of patients seeking treatment at a pediatric weight management center.

Methods:

One hundred eleven (mean age, 12.5 ± 3.0 years) patients performed a multistage exercise test on a treadmill, of which 90 (81%) met end-test criteria and provided valid VO_2peak data. Peak VO₂ was expressed: (1) in absolute terms (L·min⁻¹); (2) as the ratio of the volume of oxygen consumed per minute relative to total body mass (mL·kg⁻¹·min⁻¹); and (3) as the ratio of the volume of oxygen consumed per minute relative to fat-free mass (mL·FFM·kg⁻¹·min⁻¹).

Results:

Mean BMI z-score was 2.4 ± 0.3 and the mean percent body fat was 36.5 ± 9.7%. Absolute VO_2peak (L·min⁻¹) was significantly different between sexes; however, relative values were similar between sexes. Mean VO_2peak was 25.7 ± 4.8 mL·kg⁻¹·min⁻¹ with a range of 13.5–36.7 mL·kg⁻¹·min⁻¹.

Conclusions:

Obese youth seeking treatment at a stage 3 pediatric weight management center exhibit low VO_2peak. The protocol outlined here should serve as a model for similar programs interested in the submaximal and peak responses to exercise in obese pediatric patients.