A

Lie faceup on floor with knees bent and aligned over hips, calves raised and parallel to floor. Hold ball in both hands, arms extended, so ball hovers over your knees. Inhale, then exhale as you roll shoulder blades up and off the floor [A], extending right leg to 45 degrees and moving ball to the outside of left knee [B].

B

Inhale, then exhale as you extend left leg and bend right knee, moving ball to outside of right knee, keeping shoulders lifted, neck in a neutral position. Continue to alternate sides without lowering shoulders to floor for 1 set of 20 reps total (10 reps with each leg).