This booty-shaping move recommended by Jessica Lozano, NCSA, a certified personal trainer at the Institute of Human Performance in Boca Raton, Florida, challenges glutes of all strength levels. If you're new to exercise, start out with 3 sets of 15 reps. Intermediate exercisers should try 4 sets of 15 reps, holding 10 lbs, and advanced glutes can handle up to 5 sets of 15 reps, holding 25 lbs.
How to do it: Start standing, leaning forward on a back extension pad, with your toes turned out, knees bent (like a frog). Keeping your back flat, bend at your hips as far down as possible. To come up, push your thighs into the pad and squeeze your glutes, keeping your back straight the entire time. At the top, give your glutes an extra squeeze. Use a controlled tempo during the exercise: aim for a 2-3 second count on the way down, 1-2 seconds on the way up.