Popsugar Health & Fitness Intermediate Workouts 1-Hour Workouts Burn Mega Calories and Sculpt Your Entire Body With These Free 1-Hour Workouts 30 March 2018 by Jenny Sugar View On One Page Photo 4 of 8 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 4 500-Calorie-Burning Treadmill Workout Kick it up a notch with this hour-long treadmill interval workout that will burn around 500 calories in one session. Previous Next Start Slideshow Intermediate WorkoutsFull-Body WorkoutsTreadmill Workouts60-Minute WorkoutsStrength TrainingWorkouts