高濃度氧氣對高強度間歇運動負荷之血乳酸、心跳率與RPE之影響

The purpose of this study was to investigate the effects of blood lactate, heart rate and RPE by inhaling hyperoxia (97%) continuously before, during and after high intense of interval exercise. Method: Seven high school ball players (age: 16.1±0.48, aerobic threshold: 2.76±0.15mmol/l, anaerobic threshold: 3.34±0.31mmol/l) participated in this study. A 2-4mmol/l test which to find out personal maximum persistent intensity previously and two randomized high intensity exercises in hyperoxia or normoxia treatment were carried out with 3 days apart. Each treatment consisted 2min warm-up running at 65% personal maximum intensity followed up 30 sec rest and then into 3×3min personal maximum intense exercises with 40 seconds interval, and finally when through 20 minutes recovery phases. Results: It showed that lactate accumulation was lower under hyperoxia treatment (p＜.05) when personal maximal intensity trials increased, and also had more efficiently lactate reducing rate at recovery phases when compared with normoxia; heart rate curves with almost the same pattern under both treatments; RPE was found two fold increased under normoxia with trials when compared with hyperoxia treatment (p＜.05). Conclusions: by inhaling hyperoxia (97%) continuously before, during and after high intense exercise has lower lactate concentration at middle and end of high intense exercise trials, and there were no differences in heart rate patterns under both treatments, and also had more moderate increment in RPE.