In order to study the effect of physical fatigue by additional inhalation of hyper-oxic mixture gas (99.5%) during recovery (for 5 minutes) after intermittent max-imum anaerobic power exercise (for 30 seconds), we measured anaerobic power, lactate, b...
In order to study the effect of physical fatigue by additional inhalation of hyper-oxic mixture gas (99.5%) during recovery (for 5 minutes) after intermittent max-imum anaerobic power exercise (for 30 seconds), we measured anaerobic power, lactate, blood glucose, and heart rate of 7 sprinters and middle-distance runners.
The results were as follows;
1. There was no significant difference in maximum anaerobic power between 2 conditions, but decrease rate of mean power with the frequency of exercise was found about 10% lower when O₂ was inhaled.
2. The concentration of lactic acid in blood was some 3-15% lower respectively at the 1st-5th sets when O₂was inhaled, showing significant difference at the 3rd set (P<0.05) between 2 conditions.
3. The concentration of glucose showed a tendency to be 2-8% lower at the 1st-5th set when O₂was inhaled.
4. In heart rate during exercise was significantly lower(P<0.05) at the 3rd set when O₂was inhaled, while that upon recovery tended to be lower at the 1st, 2nd and 4th sets even if mean power was higher or equal.
5. In view of the above findings, it is considered that additional inhalation of hyperoxic mixture gas during recovery after intermittent maximum anaerobic power exercise acts on increase in the rate of aerobic energy metabolism, and reduces lactic acid in blood, blood sugar, and heart rate after exercise.