Assessment of the 5-Minute Oxygen Uptake Efficiency Slope in Children With Obesity

作者：Dias Katrin A; Masterson Concetta E; Wallen Matthew P; Tjonna Arnt E; Hosseini Mansoureh S; Davies Peter S W; Cain Peter A; Leong Gary M; Arena Ross; Ingul Charlotte B; Coombes Jeff S^*

来源：Pediatric Exercise Science, 2017, 29(3): 350-360.

DOI：10.1123/pes.2016-0248

• Exercise intervention
• oxygen consumption
• childhood obesity

Purpose: Poor cardiorespiratory fitness is associated with increased all cause morbidity and mortality. In children with obesity, maximum oxygen uptake ((V) over dotO(2max)) may not be achieved due to reduced motivation and peripheral fatigue. We aimed to identify a valid submaximal surrogate for (V) over dotO(2max) in children with obesity. Method: Ninety-two children with obesity (7-16 years) completed a maximal exercise treadmill test and entered a three-month exercise and/or nutrition intervention after which the exercise test was repeated (n = 63). Participants were required to reach (V) over dotO(2max) to be included in this analysis (n = 32 at baseline and n = 13 at both time-points). The oxygen uptake efficiency slope (OUES) was determined as the slope of the line when (V) over dotO(2) (L/min) was plotted against log(V) over dotE. Associations between the maximal OUES, submaximal OUES (at 3, 4, 5 and 6 min of the exercise test) and (V) over dotO(2max) were calculated. Results: In the cross-sectional analysis, (V) over dotO(2max) (L/min) was strongly correlated with 5-min OUES independent of Tanner puberty stage and sex (R-2 = .80, p < .001). Longitudinal changes in (V) over dotO(2max) were closely reflected by changes in 5-min OUES independent of change in percent body fat (R-2 = .63, p < .05). Conclusion: The 5-min OUES is a viable alternative to (V) over dotO(2max) when assessing children with obesity.

• 出版日期2017-8