Stand with your feet shoulder-width apart and squat down as though you are sitting on an imaginary chair. Brace your abs, keep your back almost vertical and your gaze on the horizon, and wiggle your toes so your weight transfers to your heels. Slowly lower as far down as you can. Stop if you feel any knee pain. If you can get to the point where your hamstrings touch your calves, you’re a squat expert. Practise until you can do this without pain. Slowly rise back to the starting position. Repeat without resting at the top.
Reps: 12 to 20.