Fat: If a woman's bmi or body mass index gets low (less than 20 or so), then she might not have enough fat on her body to have normal menstrual cycles. The amount of exercise shouldn't affect your period, but the amount of fat on your body can. An hour and 30 minutes of exercise a day is great! make sure your diet is balanced, that you're getting enough protein, fat and fiber, and some carbs too!
Answered 8/10/2014
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