Stand with your feet shoulder-width apart and keep a soft bend in the knees.
Push your tail bone out behind you and hold your arms by your side.
Squeeze your shoulder blades together and extend your arms behind you.
Tighten your abdominal and buttock muscles throughout this exercise.
Keeping your shoulder blades squeezed, move your arms forwards and up so they are in line with your ears.
Hold each position, keeping your shoulder relaxed and down.