Dr. Mark Harrast Body Exercise All Your Questions Answered About Hydrating on Race Day Running medicine expert Dr. Mark Harrast on what, when and how much to drink on race day. Body Exercise Demystifying the Pre-Race Meal: 4 Tips for Fueling Body Exercise 3 Simple Ways to Help Runner’s Knee Body Exercise 4 Ways to Stop Muscle Cramps From Interrupting Your Run Body Exercise What Runners Need to Know About the Immune System Body Exercise Runners, Here’s How to Manage a Pesky Hamstring Injury