Stand against a wall in sternum deep water. The back of your head, thorax and pelvis are touching the wall, your spine is in a neutral position and feet are about 30 - 40 cm from the wall, hip width apart. Activate your abdominal muscles and place your arms across your chest.
Slide down the wall into a squat position until your hips and knees are at right angles or as far as possible. Hold, then rise up to the starting position.
Throughout the movement your spine is kept straight, with the back of your head, thorax and pelvis maintaining contact with the wall. Keep your knees in line with your toes. Repeat.
