| （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.
Key words: sports biochemistry；long-term hyperthermic preconditioning；free radical metabolism；CK；LDH |
