Other Things to Be Aware of Another concern unique to women is amenorrhea, or cessation of menstruation. This occurs because the percentage of body fat in distance runners is typically quite low. If the runner is significantly underweight, weight gain can solve the problem, and contrary to popular belief, will actually improve times. There is disagreement about how to handle athletic amenorrhea. If your daughter stops or never starts menstruation by age 15, you should discuss this issue with your physician.
Safety is also a big issue for female runner.
Have a buddy or at least have it known the exact course and how long it will take to complete it. Do not wear a Walkman, and do not run in any isolated areas. Many schools ban jewelry including barrettes during competition. This is because they can fly off and hit someone or get caught on something. Don't wear them, even if they don't have rules.