than 100. But once you settle on the index that makes sense for you, keep it in mind as you go through the week. Hal Higdon is a senior writer at Runner’s World USA. More of Higdon’s writing and advice on training can
efficient, and you don’t want to burn protein, since you may be cannibalising your own muscles. You’ll find it easier to run if your muscles are well fueled with carbohydrates. This equips you to run farther or faster (or both), which will boost calorie
