IE 11 is not supported. For an optimal experience visit our site on another browser.

If you're going for the 26.2 mile run — 3 marathon myths busted

NBC's Dr. Nancy Snyderman clears up some rumors you may have heard about running marathons.

3 marathon myths busted

Feb. 20, 201502:07
/ Source: TODAY

NBC’s Dr. Nancy Snyderman clears up some rumors you may have heard about running marathons.