Book excerpt: Every runner knows how important it is to prevent an unfortunate bathroom accident midrun. This book can show you how. For any runner who wants a quick, easy reference guide to every running issue under the sun, look no further. With tips on training, nutrition, gear, motivation, health, and racing, Runner’s World How to Make Yourself Poop is essential reading for runners who want to improve their performance. From “The Best Way to Tie Your Shoes” to “9 Tactics for Busting Out of a Running Rut” and everything in between, these short, easy-to-use tips from reliable experts are the perfect gift for any runner in your life.