In the last years only a few studies focused on the use of hyperoxia during recovery between bouts of highintensity exercise and the physiological responses. The limited studies devoted to this practice provide inconsistent results. Therefore, the aim of this study was if using hyperoxia during double poling exercise will help to recover better during normoxic or hypoxic conditions. Methods: Ten male endurance athletes (25.3±4.1 yrs; 179.2±4.5 cm; 74.2±3.4 kg) performed three interventions, with 3x3min intervals on a double-poling ergometer with 3min recovery, in randomized and single-blind order. One trial was conducted in normoxic conditions (NO) with a FiO2=0.21 during the intervals and the recovery (NONO). During the 2nd trial a FiO2=1.00 was applied during the recovery (NOHE) and during the 3rd trial the intervals were conducted under hypoxic conditions (FiO2=0.165) (HO) and hyperoxia (HE) was applied during recovery (HOHE). During the intervals the mean power output (Pmean) was determined. Further blood lactate concentration and blood PO2 was determined after each interval. For the determination of the tissue saturation index (TSI) of the m. triceps brachii NIRS was used. Results: During the recoveries with hyperoxia PO2 was significantly higher compared to the other interventions (P<0.01). During the NOHE-intervention Pmean did not decrease significantly from the 1st to the 3rd interval. During the two other interventions Pmean of the 1st interval was significantly higher compared to the 2nd and 3rd interval (P<0.01). Lactate concentration showed no differences between the interventions HOHE and NONO. In NOHE lactate values were lower after the 2nd and 3rd interval compared to the other interventions. There were no significant differences in the TSI between the interventions. Discussion: An application of hyperoxia increases the diffusion of O2 to the mitochondria and therefore O2 delivery to the muscles during exercise. We could show that application of HE during recovery in normoxia increases the recovery and therefore performance in subsequent 2nd and 3rd 3min interval wasn`t significantly decreased. In the intervention during which the intervals were performed in hypoxia the hyperoxia during the recovery was not sufficient to achieve a full recovery and similar power outputs in the 2nd and 3rd interval. Although, we couldn`t find any differences in the TSI between the interventions.
© Copyright 2014 19th Annual Congress of the European College of Sport Science (ECSS), Amsterdam, 2. - 5. July 2014. Veröffentlicht von VU University Amsterdam. Alle Rechte vorbehalten. / Übersetzt mit https://www.DeepL.com/Translator