Reebok master trainer Sara Haley designed this series to burn fat and sculpt and tone the lower body. Pair these moves with either your upper-body strengtheners or cardio routine (or both!), depending on your Week 3 daily schedule. And if you feel sore the next day? Take it easy, not off. "Consistency is key," Haley says.

For this first move, start in squat position and hold for 2 counts. Straighten legs, rising onto balls of feet and reaching for the ceiling (next image). Press shoulders away from ears; squeeze abs and butt, holding body in one long line. Do 20 reps.

With feet wide, legs turned out, and hands behind head, lower into a plie squat. As you return to standing, lift one knee and reach for it with the opposite elbow (next image). Do 20 reps total, alternating sides.

Standing on a wood or tiled floor, put a towel underneath ball of one foot. With feet together and knees soft, slowly slide towel straight out to side as supporting leg bends into a deep, one-legged squat (next slide). Keep heel of supporting leg on floor. Slowly bring leg back in, keeping chest lifted. Repeat on opposite leg. Alternate, doing 12 reps per leg.

Kick one foot up to your glute, flexing foot to contract back of leg. Alternate legs, pumping arms. Continue for 45 seconds.

With arms raised out to sides, lunge your right leg forward, back leg straight. Engaging your core for balance, rotate upper torso toward front leg (next slide). Squeeze glutes to keep hips facing front. Slowly return to center. Do 10 times on this side, then switch legs and repeat series on the other side.

Lay on your side with legs extended straight and feet stacked. Press into your forearm, lifting hips off floor. Place free hand behind head to open up chest. Hold for 30 seconds.

Place a towel under both feet. Begin in plank position with glutes and core engaged, and shoulders in line with hands. Using core, slide towel into chest to bring knees in, keeping upper body stationary (next image). Extend legs back out to plank. Do 10 times.

With arms raised out to sides, lunge your right leg forward, back leg straight. Engaging your core for balance, rotate upper torso toward front leg (next slide). Squeeze glutes to keep hips facing front. Slowly return to center. Do 10 times on this side, then switch legs and repeat series on the other side.

Lay on your side with legs extended straight and feet stacked. Press into your forearm, lifting hips off floor. Place free hand behind head to open up chest. Hold for 30 seconds.

Place a towel under both feet. Begin in plank position with glutes and core engaged, and shoulders in line with hands. Using core, slide towel into chest to bring knees in, keeping upper body stationary (next image). Extend legs back out to plank. Do 10 times.