It depends what you are training for.
About 4 to 5 min
Your period should last about 2 weeks the most..
Five to 10 minutes
Your period lasts as long as your body needs it to. I am not sure why you would want to make your period last longer but you should not try to altar your bodies natural cycles.
it should start in about 35 days, if not a pregnancy test should be administered.
for a long time
Not usually more than a day.
You shouldn't worry so much about this. Sometimes periods can last that long or even longer. Just make sure that you are being sanitary. If your period last longer than ten days, consult a doctor.
Periods can last three days or five or seven or more or less. Five days is probably average, but every woman is different.
A very, very long race. It would require a long training period.
it does not have one
40 weeks from the last period.