Position yourself as lying on your stomach.
As the knee is straight to begin with and then progress to flex (bend) your knee.
Hold and slowly go back.
Stand with your toes shoulder distance apart. Your hands can relax on the the front of your thighs or reach in front of you. If wanted, keep directly to the returned of a chair or wall for balance.
Have your chest lifted and gradually lower your hips around 10 inches, as in case you are sitting down right into a chair. Hold for 5 seconds. Return to standing