Laufen / Fitness

HIIT - Treadmill workouts! Research shows you can achieve more progress in a mere 15 minutes of interval training (done three times a week) than the girl jogging on the treadmill for an hour. Not only do you burn more calories during a HIIT workout, but the effect of all that intense exertion kicks your body's repair cycle into hyperdrive. That means you burn more fat and calories in the 24 hours after a HIIT workout than you do after, say, a steady-pace run.