In:
Pediatric Exercise Science, Human Kinetics, Vol. 29, No. 3 ( 2017-08), p. 350-360
Abstract:
Poor cardiorespiratory fitness is associated with increased all cause morbidity and mortality. In children with obesity, maximum oxygen uptake (V̇O 2max ) may not be achieved due to reduced motivation and peripheral fatigue. We aimed to identify a valid submaximal surrogate for V̇O 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 V̇O 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 V̇O 2 (L/min) was plotted against log V̇E. Associations between the maximal OUES, submaximal OUES (at 3, 4, 5 and 6 min of the exercise test) and V̇O 2max were calculated. Results: In the cross-sectional analysis, V̇O 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 V̇O 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 V̇O 2max when assessing children with obesity.
Type of Medium:
Online Resource
ISSN:
0899-8493
,
1543-2920
DOI:
10.1123/pes.2016-0248
Language:
Unknown
Publisher:
Human Kinetics
Publication Date:
2017
SSG:
31
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