| （广东外语艺术职业学院 基础部，广东 广州 510507） 摘 要：通过一次递增负荷至力竭运动对机体血清中自由基代谢、CK和LDH活性的影响，观察运动后恢复期的变化；给受试者1个月高温预处理，即发生热休克反应，之后再进行一次递增负荷，检测机体血清中自由基代谢、CK和LDH的活性，从而探讨在递增负荷运动中，长期高温预处理对机体抗氧化和抗损伤能力的影响。结果发现：1个月高温预处理后与预处理前比较，安静时MDA含量减少且差异有显著性(P<0.05)，SOD活性有上升趋势，但差异无显著性(P>0.05)，LDH活性下降且差异有非常显著性(P<0.01)；力竭运动后即刻，血清MDA含量减少且差异有非常显著性(P<0.01)，SOD活性升高且差异有非常显著性(P<0.01)，CK活性下降且差异有显著性(P<0.05)；力竭运动后1 h，MDA含量减少且差异有非常显著性(P<0.01)，SOD活性升高且差异有非常显著性(P<0.01)。研究结果表明，长期高温预处理能提高机体抗氧化能力，减轻自由基所致损伤，对急性运动所致机体损伤具有一定的保护作用。 |
LIN Yan-rong
| （Basic Department，Guangdong Teachers College of Foreing Language and Arts，Guangzhou 510507，China） Abstract: In order to observe the effects of one load increment to exhausted exercising on the free radical metabo-lism and CK and LDH activities in the body’s blood serum as well as changes made in recovery period after exer-cising, the author provided the testees with 1-month hyperthermic preconditioning, i.e. to produce a thermal shock reaction, then made one load increment, tested the free radical metabolism and CK and LDH activities in the body’s blood serum, thus probed into the effects of long-term hyperthermic preconditioning in load increased exercising on the body’s oxidation and injury resistance capacities, and revealed the following findings: as compared with the same before conditioning, after 1-month hyperthermic preconditioning, the MDA content in a calm condition de-creased and the difference was significant (P<0.05), the SOD activity showed an increasing trend, but the differ-ence was not significant (P>0.05), the LDH activity decreased and the difference was very significant (P<0.01); immediately after exhausted exercising, the MDA content in blood serum decreased and the difference was very significant (P<0.01), the SOD activity increased and the difference was very significant (P<0.01), the CK activity decreased and the difference was very significant (P<0.05); in 1 hour after exhausted exercising, the MDA content decreased and the difference was very significant (P<0.01), the SOD activity increased and the difference was very significant. The said findings indicated that long-term hyperthermic conditioning can enhance the body’s oxidation resistance capacity and reduce injury caused by free radicals, having a certain protection function on acute body in-jury caused by exercising. |
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