HOW: While keeping the little toes relaxed, bring the big toe in towards the midline of your body and back. Avoid allowing the foot from collapsing in or pronating, isolate this motion to the big toe!
FEEL: You should feel the big toe muscles working and a stretch in your big toe.
COMPENSATION: Keep your foot flat but don't let it collapse in as you bring your toe inward. Don't let your other toes off of the ground.