ABSTRACT
To study the effect of exercise on the reproductive hormones [testosterone and estrogen] and trophic hormones [follicle stimulating hormone [FSH], luteinizing hormone [LH] and prolactin [PRL]] in girls of Sport Education at Mansoura University. Sixty students were randomized chosen from the student girls aged 18-20 years in the faculty of Sport Education at Mansoura University, Egypt, divided into 2 groups: Study group [30 students]: Control group [30 students]. The study group will practice only the physical exercises in the faculty curriculum for 2 years, 4 days/week. The control group will not practice any kind of sport. There is no significant statistical difference between the study group and the control group regarding anthropometric measurements. There is significant increase in testosterone level in the control group. Also there is significant increase in estradiol level in the study group. Regarding FSH, LU and prolactin there is no significant statistical difference in hormonal level in the study and control group. Non vigorous exercise in young girls is beneficial in decreasing testosterone level and increasing estradiol level, with no effect on trophic hormones [FSH. LH and prolactin]