by Jeff Gaudette
Muscle cramps can derail even the most seasoned runners' races.
by Kelly O'Mara, Published Sep. 17, 2013, Updated Jan. 18, 2016 at 12:24 PM UTC
Despite modern science, the true cause of exercise-induced cramps is not known.
by Mario Fraioli, Published Jul. 1, 2011, Updated Mar. 15, 2012 at 5:10 PM UTC
In this video a runner describes what it's like to be a marathon runner in training.
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