Don't rely on excess exercise to cancel out everything you ate or drank. (health.com)
Remember that excess exercise creates stress on the body, which takes vital energy away from the reproductive system. (mindbodygreen.com)
In the body, when you have an adrenal system that's out of balance because of stress as we talked about earlier, whether it is because a person is involved in excess exercise, very stressful schoolwork, a stressful career advancement, or even relationship difficulty, the adrenal glands will kick into overdrive, resulting in an increased level of estrogen circulating in the body. (drlam.com)