Maybe that question was for me. I have been told to sit on a couch while my legs are straighten. Put a pillow under my heels and press down with my knees for 5 secs. 200 times a day for 3 weeks. Another orthopedist had told me to do this with the pillow under my knees. She told me this is going to make the matter worse. I think what she is trying to achieve here is activating the VMO without activating VML. When the pillow is under my knee and press down with my knees, i can see the muscles contracting on both side. Since my kneecap is shifted outside i have to strengthen inner muscles.