The Basic Leg Squat Exercise
Stand in position shown, keep wider than shoulder width apart, toes facing slightly out for balance then bend your knees keeping your back straight until your thighs are parallel with the floor then straight your legs and stand up again. Perform the exercise slowly and do not bounce at the bottom of the exercise. Keep hands held yout in front of you for balance or cross them across your chest.
For a bit of variety either perform the exercise very slowly or very quickly so that you jump a few inches off the ground at the top of every movement.