Runner's World How to Make Yourself Poop: And 999 Other Tips All Runners Should KnowEbookRunner's World How to Make Yourself Poop: And 999 Other Tips All Runners Should KnowbyMeghan KitaRating: 3 out of 5 stars3/5Save Runner's World How to Make Yourself Poop: And 999 Other Tips All Runners Should Know for later