5 Calorie-Burning Treadmill Workouts Short on time? These fast, power-packed routines are for you. By Annabelle RobertsonWebMD Feature Bored with the treadmill? Not seeing the results you want? It's time to super-charge your treadmill time. Treadmill workouts can be some of the most efficient, challenging, calorie-burning routines around. The key is intervals.