People who exercise more The sport-oriented student runner as well as nak. More swimming and gymnastics, etc. These people will have a monthly menstrual irregularity did not come because of a lack of hormones, and there were too few heavy.
People who exercise hard Play sports, such as runners, swimmers and ballet, gymnastics, etc. These people are menstrual irregularities. Not because of a lack of menstrual hormones. And the weight is too low
People who exercise hard play hard, such as running, ballet, swimming, gymnastics and etc. these people will have the disorder of the month. Menses not because of a lack of hormones and weight is too low.