Stand up straight.
Take a medium step backwards to position one foot behind the other, in a straight line.
Your rear heel will be lifted from the floor.
You may wish to hold your arms out to your sides for balance.
Next, drop your hips down towards the floor by bending both of your knees.
Aim to touch your back knee against your front heel.
Push back up from this position by driving through your buttock muscles and pushing into the ground through your front heel.
Repeat.