To work your shoulders at different angles, try this move from One Hundred Strength Exercises by Ed McNeely (Burford Books, 2005).
- Stand with feet shoulder-width apart, holding a medicine ball with right hand against a wall at arm's length.
- Keeping hips and shoulders square to the wall, outline the letters of the alphabet by tracing the ball against the wall.
- Aim to get to z; if you have to stop at p, shoot for q next time.
- Repeat with left arm.
Originally published in Fitness magazine, May 2006.