by Jason R. Karp, Ph.D., Published Mar. 14, 2014, Updated Jan. 18, 2016 at 12:26 PM UTC
Every woman is different, but monthly cycles are all similar and can affect your running.
by Duncan Larkin, Published Sep. 12, 2011, Updated Sep. 12, 2011 at 6:10 AM UTC
One Canadian researcher is trying to find the answer to that question.
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