This young patient had a chronic ankle sprain that WOULD NOT GET BETTER, He wore a brace but still had pain after more than 6 months. To make matters worse, the hip on the right side (where the ankle sprain was) became weak from the pain. You can see his right knee collapses in when he does a right leg mini squat.
After we gave him this exercise:
he and stretched the right front/inner hip, he had more control:
And now he runs side to side like this: