Assessment of the five-minute oxygen uptake efficiency slope in children with obesity

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, Inqul, Charlotte B. and Coombes, Jeff S. (2017) Assessment of the five-minute oxygen uptake efficiency slope in children with obesity. Pediatric Exercise Science, 29 3: 350-360. doi:10.1123/pes.2016-0248

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Author 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
Inqul, Charlotte B.
Coombes, Jeff S.
Title Assessment of the five-minute oxygen uptake efficiency slope in children with obesity
Journal name Pediatric Exercise Science   Check publisher's open access policy
ISSN 0899-8493
1543-2920
Publication date 2017-02-10
Year available 2017
Sub-type Article (original research)
DOI 10.1123/pes.2016-0248
Open Access Status File (Author Post-print)
Volume 29
Issue 3
Start page 350
End page 360
Total pages 11
Place of publication Champaign, IL United States
Publisher Human Kinetics
Collection year 2018
Language eng
Formatted abstract
Purpose:
Poor cardiorespiratory fitness is associated with increased all cause morbidity and mortality. In children with obesity, maximum oxygen uptake (V̇O2max) may not be achieved due to reduced motivation and peripheral fatigue. We aimed to identify a valid submaximal surrogate for V̇O2max in children with obesity.

Methods:
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 V̇O2max 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 V̇O2 (L/min) was plotted against logV̇E. Associations between the maximal OUES, submaximal OUES (at 3, 4, 5 and 6 minutes of the exercise test) and V̇O2max were calculated.

Results:
In the cross-sectional analysis, V̇O2max (L/min) was strongly correlated with 5-min OUES independent of Tanner puberty stage and sex (R2=0.80, P<0.001). Longitudinal changes in V̇O2max were closely reflected by changes in 5-min OUES independent of change in percent body fat (R2=0.63, P<0.05).

Conclusions:
The 5-min OUES is a viable alternative to V̇O2max when assessing children with obesity.
Keyword Exercise intervention
Oxygen consumption
Childhood obesity
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes Open access file is as accepted for publication.

 
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Created: Mon, 13 Mar 2017, 11:52:01 EST by Susan Allen on behalf of Institute for Molecular Bioscience