Start with feet shoulder width apart.
While pressing through your heels, sit back and bend knees to 90 degrees.
Return to starting position and repeat.
Start with feet shoulder width apart.
Bring knee up to 90 degrees and perform a circle with your knee.
Return to start, reset feet and switch to the other side.
Start with feet hip width apart and hands on your head.
Fold forward at the hips until you feel a stretch in the back of your legs.
Return to starting position and repeat.