Begin by walking forwards in a clear open space.
Turn your head and gaze diagonally up to one side whilst you continue to walk forwards for 2 steps.
Then turn your head and gaze diagonally down to the other side whilst you continue to walk forwards for 2 steps.
Repeat this pattern of walking forwards with diagonal head turns up to one side for 2 steps and then down to the other side for 2 steps, for as many times as advised.
Then repeat the exercise, this time walking backwards.