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Navigate: FAQ Home Page > Sports & Exercise > Cramping and no period
The cramps could be mid-cycle cramps and worsened by exercise, but this constellation of symptoms is a bit unusual. It's also VERY hard to say if the cramps you are having are really from the uterus or other pelvic organs, just from the bit of history you have given.
Excessive exercise is known to affect periods adversely and suppress them. It is very hard for me to say much more without talking to you or seeing you. You should see your doctor to evaluate this further.
Elizabeth Lee , M.D.