Sit facing your partner with both knees bent, feet on the floor. Then, each partner slides to the left so that your right knees are touching and bodies are parallel but still opposite one another. Resting your head in your hands, elbows wide, you and your partner each do a full abdominal curl, each pulling up towards his/her knees. At the top of the movement, rotate left elbow and shoulder towards centre—try to get your elbows as close to your partner’s as possible. Complete your repetitions, then switch sides.