Topic: sprinting

We’ve heard from trainers that a slow, 30 minute jog isn’t an effective workout; we’ve also seen spreadsheets and charts describing 30-minute workouts that involve sprinting, jogging, and even short walks. So what really happens to your body when you run long vs. short distances, at a slow or fast pace? To find out, we asked Derek Peruo , a personal trainer at Peak Performance in New York City who writes and consults for magazines like Men’s Fitness, Muscle & Fitness, and Men’s Health. We asked him about everything from calorie-burning to metabolism—and even things like V02 max, muscle building, and the elusive runner’s high. More »