Isometric shoulder extension supine on ball (Shoulder extension strengthening isometric, against ball, supine)
Lie on your back with a stability ball on your weaker side.
Place your weaker arm on top of the ball.
Push your weaker arm down into the ball to activate the muscles in the back of your shoulder.
You should feel your shoulder lift very slightly from the bed.
Keep your back and neck muscles relaxed throughout the exercise.
Required equipment: Mat, Ball - small
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