To begin the squat, place your hands behind your head, with your forearms parallel with the floor. Have an erect spine, with a natural arch in the lower back. Have your feet in a comfortable position, between hip and shoulder width apart. You may find it more comfortable to have your feet slightly turned out.
As you squat down try to maintain a parallel alignment between your trunk and your shin bones. Also try to ensure the alignment of your knees over your feet. Your physiotherapist may choose to progress you onto to a more difficult version of this exercise – perhaps squatting with a barbell.
Alternatively, if you find this exercise difficult to do correctly, your physiotherapist may prescribe an easier version, where support is taken in-front with the upper limbs or perhaps squatting using a gym ball.