Lift left foot and shift weight to right leg.
Do 12 reps. Switch sides; repeat.
Step left foot back and to right as you lower arms to right side (as shown).
Switch sides; repeat.
Squeeze ball as you raise legs about 12 inches off ground (as shown).
Slowly return to start.
Do 12 reps. Switch sides; repeat.
Lower upper body; repeat.
Squeeze ball with both hands and extend arms overhead.
Do 12 reps. Switch sides; repeat.
Contract abs as you hinge forward from hips and extend left leg straight behind you (as shown).
Do 12 reps. Switch sides; repeat.
Squeeze ball in front of you with both hands, elbows bent.
Contract abs and tilt pelvis under at a 45-degree angle.
Maintain contraction as you rotate torso left (as shown).
Return to start; repeat on right side to complete one rep. Do 12 reps.