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Verification of Maximal Oxygen Uptake in Obese and Nonobese Children

BHAMMAR, DHARINI M.; STICKFORD, JONATHON L.; BERNHARDT, VIPA; BABB, TONY G.

Medicine & Science in Sports & Exercise: April 2017 - Volume 49 - Issue 4 - p 702–710
doi: 10.1249/MSS.0000000000001170
Applied Sciences

Purpose: The purpose of this study was to examine whether a supramaximal constant-load verification test at 105% of the highest work rate would yield a higher V˙O2max when compared with an incremental test in 10- to 12-yr-old nonobese and obese children.

Methods: Nine nonobese (body mass index percentile = 57.5 ± 23.2) and nine obese (body mass index percentile = 97.9 ± 1.4) children completed a two-test protocol that included an incremental test followed 15 min later by a supramaximal constant-load verification test.

Results: The V˙O2max achieved in verification testing (nonobese = 1.71 ± 0.31 L·min−1 and obese = 1.94 ± 0.47 L·min−1) was significantly higher than that achieved during the incremental test (nonobese = 1.57 ± 0.27 L·min−1 and obese = 1.84 ± 0.48 L·min−1; P < 0.001). There was no significant group (i.e., nonobese vs obese)–test (i.e., incremental vs verification) interaction, suggesting that there was no effect of obesity on the difference between verification and incremental V˙O2max (P = 0.747).

Conclusion: A verification test yielded significantly higher values of V˙O2max when compared with the incremental test in obese children. Similar results were observed in nonobese children. Supramaximal constant-load verification is a time-efficient and well-tolerated method for identifying the highest V˙O2 in nonobese and obese children.

1Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas, Dallas, TX; 2UT Southwestern Medical Center, Dallas, TX; 3Exercise Physiology Program, College of Nursing and Health Sciences, Valdosta State University, Valdosta, GA; 4Health and Exercise Science, Appalachian State University, Boone, NC; and 5Exercise Science, Department of Health and Human Performance, Texas A&M University–Commerce, Commerce, TX

Address for correspondence: T.G. Babb, Ph.D., Institute for Exercise and Environmental Medicine 7232 Greenville Ave., Suite 435, Dallas, Texas 75231; E-mail: TonyBabb@TexasHealth.org.

Submitted for publication August 2016.

Accepted for publication November 2016.

© 2017 American College of Sports Medicine