NBC’s Dr. Nancy Snyderman clears up some rumors you may have heard about running marathons.
If you're going for the 26.2 mile run — 3 marathon myths bustedNBC's Dr. Nancy Snyderman clears up some rumors you may have heard about running marathons.PrintFeb. 20, 2015, 4:34 PM UTC / Source: TODAYNBC’s Dr. Nancy Snyderman clears up some rumors you may have heard about running marathons.Print