Targets: butt, thighs, calves, shoulders, and back

Holding a dumbbell in each hand with arms at sides, step forward with your left foot into a lunge position, bending left knee 90 degrees (keep knee behind toes).

b. Squeeze your butt to come to a stand on your left leg as you lift your right leg off the floor behind you and raise your arms out to the sides until they're parallel to the floor. (Challenge: Finish by rising up onto the ball of your left foot.) Return to start and do 12 to 15 reps; switch sides.

Bing:Best exercises to work your back

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