Abstract
The purpose of the study was to investigate whether the use of hyperoxic gas generator is effective in recovery from fatigue after exercise. Ten healthy male subjects performed two trials; each consisting of ten minutes of exercise at a workload of 65%VO_2max on a bicycle ergometer and twenty minutes of recovery. The hyperoxic gas generator was applied to the one trial during recovery in order to determine its effect. The gas generator used in this study was fitted with a special film to raise oxygen concentration of the air and sent the concentraed air (30%O_2) through a pipe. The end of the pipe was set in front of the nostril within a couple of cm in accordance with the user's manual. Blood samples were collected at 3, 6, 10, 15 and 20 min after each exercise session, and blood lactate concentration was measured. Pulmonary ventilation and heart rate were measured during the experiments. The subjects were questioned as to their condition afler each trial using a questionnaire. With regard to ventilation, heart rate and blood lactate concentration responses during recovery, no significant difference was found between the cases using ie hyperoxic gas and those not using it. The questionnaire investigation showed no significant difference either. These results indicate that the hyperoxic gas generator is not effective in the recovery after exercise fatigue under these experimental conditions.
