decreased slightly. The measurement was made during and after training. The researchers then compared the results and proved that the best time to train would be in the late afternoon or early evening. Indeed the ratio cortisol is at its best. Of course not everyone can respect these schedules but it is a factor not to be neglected for those who have the opportunity. Another point: the more practitioners are experienced and the more levels collapse during training. A study of 400 meter sprint athletes was conducted and the results show that LH increased in experienced athletes. Least sprinters see their increase by %. Free increases it by 0%. On the other hand for the best athletes dropped by .