High-Five Oblique Crunches

Lie on your backs side by side, knees bent and hips almost touching. Curl up, rotate toward each other and high-five with your outside hands, the ones farthest from your partner, then lower down and repeat. It is a crunch with a reason to finish each rep, since a missed high-five is obvious to both of you. A partner who cannot yet reach the full twist can simply curl and touch fingertips lower down, and the stronger one can pause at the top for a second. Look toward your partner rather than straight up at the ceiling, and keep the movement slow.