Exercise after acute hyperbaric oxygenation: is there an ergogenic effect?
The purpose of this study was to determine the effects of a 1-h exposure to 2.0 atm abs (202.6 kPa) and 100% oxygen on subsequent maximal O2 consumption (VO2max), ventilation threshold (VT), lactate threshold (LT), and muscle oxygenation (%Mox) during incremental exercise to maximum on a cycle ergometer. Two baseline exercise tests (T1 and T2) were performed on separate occasions without prior exposure to hyperbaric oxygen (HBO2) and a third test (T3-HBO2) was performed after (22.5 +/- 5.6 min) HBO2 Near infared spectroscopy was used to monitor oxygenation of the left vastus lateralis muscle during T2 and T3-HBO2. No significant differences were observed between VO2max VT, or LT among any of the exercise tests. There was no significant difference in %Mox between T2 and T3-HBO2 except at 235 W where there was a significant elevation in %Mox during T3-HBO2 relative to T2. These results suggest that prior exposure to HBO2 (100% O2 at 2 atm abs for 1 h) has no ergogenic effect on subsequent incremental exercise performance.
Webster
A L
AL
Faculty of Physical Education and Recreation, University of Alberta, Canada.
Syrotuik
D G
DG
Bell
G J
GJ
Jones
R L
RL
Bhambhani
Y
Y
Young
M
M
D000328:Adult; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D006400:Hematocrit; D006801:Humans; D006931:Hyperbaric Oxygenation; D019344:Lactic Acid / Q000097:blood; D010101:Oxygen Consumption
D019344:Lactic Acid