Does exercise affect your period or ovulation cycle?

I wanted to know if exercise will affect my period or ovulation?  I recently have had abnormal periods due to loss of a pregnancy at 20 weeks with a d&c performed.  My first period came back 35 days after surgery and the second just came back the other day, 47 days after the previous period.  I have waited the treen months like the doctor told meand we are for sure ready to start trying again.  I like to get on the treadmill and exercise, but I am scared that it will affect my cycle.  I did not know that if alot of exercise, where I would sweat alot can cause my period or ovulation to be even more screwed up or skipped.  I have heard that alot of heavy exercising can delay your period, I did not know how true this was, does anyone know? I do not want to risk skipping any more cycles and ovulation cause I want to ttc as sson as possible.  i am confused????

[JerzyGirlatHrt]

When they say heavy exercising they mean really heavy...as in athlete-level training.  Regular exercise shouldn't have much effect on AF, besides helping with cramps and pms, especially if you are used to exercising already.  Dramatic changes will effect it.

[paranoidpatty]

I've heard that excessive exercise such as training for a marathon or something could affect your ovulation.  I don't think regular exercise would.  

[shesherm]

yeah i put off working out because i didnt want to risk anything and now need to loose a few pounds :O(  but yes heavy weights and straining NOT GOOD  light exercise and treadmill GOOD.  super sticky baby dust :O)