my daughter was told that she was having severe pain in her right knee (she is only 10) because the muscles on the inside of her leg were under developed and the quads were pulling her knee caps out of place. she had therapy for only a few weeks and had a large improvement. the pt's are there to help you. i have a therapy in the past following ligement replacement and i can honestly say the if you trust in the pt's, you doctor and yourself, you will feel much better. hope this helps you.