Accumulated Oxygen Deficit During Exercise to Exhaustion Determined at Different Supramaximal Work-Rates.
Muniz, Daniel; Pedlar, Charles; Godfrey, Richard; Glaister, Mark
Citation: Muniz , D , Pedlar , C , Godfrey , R & Glaister , M 2017 , ' Accumulated Oxygen Deficit During Exercise to Exhaustion Determined at Different Supramaximal Work-Rates. ' International Journal of Sports Physiology and Performance , vol 12 , no. 3 , pp. 351-356 . DOI: 10.1123/ijspp.2015-0343
Purpose: The aim of the study was to determine the effect of supramaximal exercise intensity during constant work-rate cycling to exhaustion on the accumulated oxygen deficit (AOD) and to determine the test–retest reliability of AOD. Methods: Twenty-one trained male cyclists and triathletes (mean ± SD for age and maximal oxygen uptake [V̇O2max] were 41 ± 7 y and 4.53 ± 0.54 L/min, respectively) performed initial tests to determine the linear relationship between V̇O2 and power output, and V̇O2max. In subsequent trials, AOD was determined from exhaustive square-wave cycling trials at 105%, 112.5% (in duplicate), 120%, and 127.5% V̇O2max. Results: Exercise intensity had an effect (P = .011) on the AOD (3.84 ± 1.11, 4.23 ± 0.96, 4.09 ± 0.87, and 3.93 ± 0.89 L at 105%, 112.5%, 120%, and 127.5% V̇O2max, respectively). Specifically, AOD at 112.5% V̇O2max was greater than at 105% V̇O2max (P = .033) and at 127.5% V̇O2max (P = .022), but there were no differences between the AOD at 112.5% and 120% V̇O2max. In 76% of the participants, the maximal AOD occurred at 112.5% or 120% V̇O2max. The reliability statistics of the AOD at 112.5% V̇O2max, determined as intraclass correlation coefficient and coefficient of variation, were .927 and 8.72%, respectively. Conclusions: The AOD, determined from square-wave cycling bouts to exhaustion, peaks at intensities of 112.5–120% V̇O2max. Moreover, the AOD at 112.5% V̇O2max exhibits an 8.72% test–retest reliability.
This article has been accepted for publication in International Journal of Sports Physiology and Performance. The Version of Record is available online at doi: https://doi.org/10.1123/ijspp.2015-0343.
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