Raise Big Toes

With raised arches, lift only both big toes, keeping the other four on the ground, then lower them back down. Repeat this slowly 5-10 times.
This exercise and the next one require a gradual re-learning of lost muscle control. When you first try, you might not be able to move certain toes independently. Keeping your spine straight and long, you can bend your knees and bend down forward to use your fingers to help hold the other toes down while you are learning the new muscle control.