Start in side elbow plank on your right side, with your feet stacked one on top of the other (you can stagger your feet for more stability). Place your hand so your fingers point away from you.
Place your left arm behind your head and inhale to prepare.
Exhale and pull your navel to your spine while rotating your ribcage toward the floor, bringing your left elbow to your right hand.
Return to the starting position to complete one rep.
Do 10 reps on each side.
Twisting is good for the spine and tones the obliques, the ab muscles that crisscross the abdomen. To increase your stability in this position, reach your bottom toward the ceiling — this also works the inner thighs.