高强度间歇训练后高低氧恢复对于糖代谢的影响

Effects of High and Low Oxygen Recovery on Glucose Metabolism after HIIT

为探究高强度间歇训练后于90min恢复期内吸入高浓度氧气与常氧浓度对于机体糖代谢的影响,本研究选取40名大学男子篮球代表队队员作为研究对象,接受单次高强度间歇训练(high-intensity interval training,HIIT)。以120%~140%无氧阈值速度作为运动强度,运动2min,间隔休息1min,重复7次,之后吸入高浓度氧气(90%O2)恢复90min,隔天更换为常氧(21%O2)恢复90min,运动前后分别进行口服葡萄糖耐量测试并分析血糖、胰岛素、皮质醇浓度。研究结果显示,高强度间歇运动后,高氧恢复后的血糖值显著低于常氧恢复后的血糖值,并呈显著性差异(p<0.05);运动前后以及运动后高氧、常氧状态下恢复后的胰岛素敏感度均未呈显著性差异(p>0.05);高氧恢复后第60分钟、90分钟后的皮质醇浓度明显低于训练后常氧状态下恢复后的皮质醇浓度,并呈显著性差异(p<0.05)。研究结果表明,高强度间歇训练后的90min高氧恢复有助于减缓运动后的生理压力和提升运动后肌肉细胞对葡萄糖吸收能力,促进机体糖代谢。

To explore the effect of inhaling high concentration oxygen and normoxic concentration on body glucose metabolism during the recovery period of 90 minutes after high-intensity interval training, this study selected 40 college basketball team players as the research object to receive a single high intensity intermittent training (highintensity interval training, HIIT). Taking 120%~140% anaerobic threshold velocity as exercise intensity, exercised for 2 minutes, rested for 1 minute at intervals, repeated for 7 times,, then inhaled high concentration oxygen (90% O2) for 90 minutes recovery and changed to normal oxygen (21% O2) for 90 minutes recovery the following day. Before and after exercise, oral glucose tolerance test was conducted and blood glucose, insulin and cortisol concentrations were analyzed. The results showed that after HIIT, the blood glucose level after hyperoxia recovery was significantly lower than that after normoxia recovery, and the difference was significant (p<0.05); There was no significant difference in insulin sensitivity after recovery under high oxygen and normal oxygen before and after exercise and after exercise (p>0.05). The cortisol concentration after 60 minutes and 90 minutes after hyperoxia recovery was significantly lower than that after normal oxygen recovery after training, and the difference was significant (p<0.05). The results showed that 90 minutes after HIIT with high oxygen recovery could help to alleviate the physiological pressure and improve the ability of muscle cells to absorb glucose after exercise and promote the body's glucose metabolism.