While sitting upright, grip the seat of the chair on each side with your hands. Alternate between a position with a rounded back ("cat hump") and a position with a hollow back ("cow"). Perform the movement slowly and in a controlled manner until the end of each reach.
Cat: Exhale, draw in your belly button, tilt your pelvis backwards, bend your spine upwards, pull your chin towards your chest and push your arms firmly against the seat.
Cow: Inhale, press your belly button towards the floor, tilt your pelvis forwards, your spine is bent towards the floor and your chin is pointing diagonally forwards (stretch your head, tilt backwards), your shoulder blades are pulled together and your arms push firmly against the seat.
