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 V̇O2max when compared with an incremental test in 10 – 12 year old nonobese and obese children. Methods Nine non-obese (BMI percentile: 57.5 ± 23.2) and nine obese (BMI percentile: 97.9 ± 1.4) children completed a two-test protocol that included an incremental test followed 15 minutes later by a supramaximal constant-load verification test. Results The V̇O2max achieved in verification testing (Nonobese: 1.71 ± 0.31 and Obese: 1.94 ± 0.47 L/min) was significantly higher than that achieved during the incremental test (Nonobese: 1.57 ± 0.27 and Obese: 1.84 ± 0.48 L/min; P < 0.001). There was no significant interaction (group (i.e., nonobese versus obese) × test (i.e., incremental versus verification)), suggesting that there was no effect of obesity on the difference between verification and incremental V̇O2max (P = 0.747). Conclusion A verification test yielded significantly higher values of V̇O2max 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 V̇O2 in nonobese and obese children.