Targets: Shoulders, back, abs, obliques, and butt
- Start on all fours, left palm on ball, right on ground.
- Raise right arm (elbow near ear) and extend left leg until both are parallel to ground.
- Bring right elbow and left knee in toward each other, crossing left knee over toward right side and right elbow over toward left side.
- Do 12 reps.
- Switch sides; repeat.