Party-dress ready in 3 weeks It’s not too late to dazzle in your holiday best during the festive season! Just take it from Brooke Burke-Charvet’s trainer, Autumn Calabrese. Here, she reveals four balancechallenging moves that work double-duty to tone tro

Though you may feel a little silly doing this move, it’s incredibly effective at shrinking saddlebags. “Fire hydrants target the gluteus medius, the muscles on the sides of your butt,” explains Calabrese, creator of the new fitness program 80 Day Obsession. Keeping your core stabilized as you lift your leg also engages the erector spinae to help smooth out back bulges.

TO DO: Crouch on all fours and nestle a 3-pound weight inside your left knee. Keeping your right knee at a 90-degree angle, lift your left leg out to the side to bring your left thigh parallel to the ground, then lower back down. Do 10 reps, then switch sides.