First you will grab a yoga strap and lay down on your yoga matt on your back. Put the yoga strap behind your knee pulling your knee towards your navel. let your leg rest slightly outward, while keeping your other leg as straight as possible.
Lie on your back on the floor with your knees bent. Flatten your back against the floor by tightening your abdominal muscles and bending your pelvis up slightly. Hold for a few seconds. Repeat.
Roll your foot around with the heel up to move the ankle joint; switching the direction that you roll periodically.