Physical education helps normalize sleep Regardless of age training normalize melatonin production in the brain, and improve sleep. If you ever saw how the children are fast asleep, tired with running for the day, you believe it. In Chapter 10, I'll tell you why sleep is important for optimizing brain function. Remember that you should not constantly train right before bedtime. Try to finish the active load of about four hours before bedtime. Training helps women cope with hormonal changes There is evidence that exercise helps women to minimize the impact of PMS. It also helps to cope with the hormonal fluctuations that occur during pregnancy, perimenopause and menopause.