Popsugar Fitness Treadmill Workouts 30-Minute Cardio and Strength-Training Workouts Burn Fat and Build Muscle With Any of These 30-Minute Workouts 21 April, 2018 by Christina Stiehl View On One Page Photo 12 of 12 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 12 30-Minute Belly-Fat-Melting Pyramid Interval Treadmill Workout This treadmill workout works through intervals and varying inclines to keep your body guessing and torch calories. After a five-minute warmup, you'll break a sweat and run up to an 8.0 speed before a five-minute cooldown. Previous Next Start Slideshow Treadmill WorkoutsCardio Workouts30-Minute WorkoutsFull-Body WorkoutsWorkoutsStrength Training