Stand with your feet hip-width apart (A). Step forward with your left leg, bending your left knee until both legs form 90-degree angles—your right knee should nearly touch the floor (B). Push back to start. Repeat, stepping forward with your right leg. Alternate legs for a total of 12 lunges on each side.
Mountain Climbers With a Twist and a Butt Kick. Begin in push-up position. Raise your right leg back behind you as high as you can while maintaining control. Then lower your leg, bend and tuck your knee, and cross it underneath you. Return your foot to starting position. Repeat this eight times on the right side and then switch to the left. Complete three sets.