Extracted from Straitstimes:
Dr Tan said that women who exercise excessively and do not receive the proper nutrients from food may disrupt the balance of hormones in their bodies, causing a change in the menstrual cycle.
Some may even stop getting monthly periods, a sign that their oestrogen levels have dropped. Since oestrogen is needed to regulate bone metabolism, this may put them at greater risk of developing osteoporosis, a disease in which bones become brittle.
For men, over-exercising can affect their fertility. Dr Tan said that it is well documented that the decrease in sperm density and activity can be linked to excessive exercise in sports such as cycling.
Both men and women can experience temporary suppression of their immune systems during bouts of over-exercise. This means that he or she would be more susceptible to infection.
