| （1.华南理工大学 体育学院，广东 广州 510641；2.华南师范大学 体育科学学院，广东 广州 510631） 摘 要：研究低氧训练中补充糖－电解质饮料对机体水平衡及运动能力的影响。７名健康体育学院学生参与实验，在常氧或低氧（低氧帐篷，氧体积分数15.4%）下以70%VO2max负荷运动至力竭，运动中不补液或补充佳得乐运动饮料。结果显示，机体在低氧或常氧环境下进行一次性力竭运动后均出现体重下降、血清渗透压升高等脱水现象，运动中补充糖－电解质饮料可明显改善脱水情况，恢复机体水平衡。低氧环境下与常氧下绝对强度相同的运动负荷相对增大，运动中心率明显增加，运动时间明显缩短，但在补液干预下心率反应明显降低，运动时间明显延长。低氧环境下运动机体乳酸积聚的速度加快，补液可使运动后的血乳酸值显著性降低。实验结果提示，低氧训练中适时补充糖－电解质饮料可有效防止体液丢失，并有利于维持心率和消除乳酸，提高机体的运动能力，促进恢复。 |
GUO Zhe-bin1，MIAO Miao2，HUANG Yu-shan2，GAO Xuan2，GUO Hong2
| （1.School of Physical Education，South China University of Technology，Guangzhou 510641，China；2.School of Physical Education，South China Normal University，Guangzhou 510631，China） Abstract: In order to study the effects of the supplement of carbohydrate-electrolyte drinks on body fluid balance and sports capacity during hypoxic training, the authors selected 7 healthy students from a physical education insti-tute to participate in the experiment and exercise in a normoxic or hypoxic environment (a hypoxic tent with 15.4% of oxygen concentration) under the load of 70%VO2max until they were exhausted – no fluid or drink was supple-mented during exercising, and revealed the following findings: after having done an exhausted exercise in a hypoxic or normoxic environment, the human body showed signs of dehydration, such as weight loss and rise of serum os-motic pressure; the supplement of carbohydrate-electrolyte drinks during exercising can significantly improve the conditions of dehydration, and recover body fluid balance; in a hypoxic or normoxic environment, with the relative increase of exercise load with the same absolute intensity, during exercising the heart rate increased significantly, the exercise time was significant shortened, but with the supplement of fluid, the heart rate decreased significantly, and the exercise time was significantly lengthened; in a hypoxic environment, the accumulation of lactic acid in an exercising body was accelerated, but the supplement of fluid can significantly lower blood lactic acid value after exercising. The experimental results indicate that timely supplement of carbohydrate-electrolyte drinks during hy-poxic training can effectively prevent the loss of body fluid, being conducive to maintaining heat rate, eliminating lactic acid, enhancing body sports capacity, and promoting body recovery. |
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