Popsugar Fitness Workouts 15-Minute Butt Workout Transform Your Butt in Just 15 Minutes October 13, 2014 by Jenny Sugar View On One Page Photo 3 of 5 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 3 Single-Leg Bridge Lie on your back, with the knees bent, and place your hands on the floor for stability. Extend the left leg out. Pressing your right heel into the floor, lift your pelvis up, keeping your body in a stiff bridge position. Slowly lower your body to the floor. This completes one rep. Repeat with one leg for 30 seconds, then switch sides and perform reps on your other leg for an additional 30 seconds. Previous Next Start Slideshow WorkoutsStrength TrainingButt Exercises15-Minute Workouts