Effect of Heavy Load Training on Serum Testosterone, Cortisol and Immune Function of Aerobic Athletes

Objective This paper is to explore the effect of heavy load training on serum testosterone, cortisol and immune function of aerobic athletes 4 week intensive training was carried out Methods The subjects of this experiment are 12 aerobic athletes The training loads in 4 weeks were set respectively around 75% 80% 80% and 85% of maximum heart rate of each subjects, training 5 days and a half each week Strength training was on Tuesday afternoons and Thursday mornings, movement training in the other sessions Subjects were training together and instructed by full-time coaches in the whole training process Blood samples were drawn in the second week, before and after 4 week heavy load training Serum testosterone serum cortisol hemoglobin and the percentage of lymphocyte subpopulations were determined Results After 4-week heavy load training T had a significant decrease compared with that before the training and that in the second week (P<0 01) C had a significant increase compared with that before the 4 week heavy load training (P<0 01) and had no significant change compared with that of the second week (P>0 05) T/C ratio had a significant decrease compared with that before the 4-week heavy load training (P<0 01) Hemoglobin and CD4% had a significant decrease compared with that before the 4-week heavy load training (P<0 05) CD8% had no significant change compared with that in the second week and before the 4 week heavy load training (P>0 05) CD4/CD8 ratio had a significant decrease compared with that before the 4 week heavy load training (P<0 01) Conclusion The heavy load training may result in a significant decrease of T T/C ratio CD4, CD4/CD8 ratio and hemoglobin During sports training T/C and CD4/CD8 ratio can be used for monitoring athletes' body functions, which is distinctively meaningful for determining and preventing over-fatigue of athletes