Here is a question about a partial knee replacement and still in constant chronic pain after the surgery.
This article goes into depth on the importance of breathing for complete knee pain recovery. It talks about how to actively ‘override’ the tension in your nervous system through breathing to relax the tension in your knees as well as the rest of your body. The end result allows you to control the amount of pain, tension, and discomfort in your knees to deal with chronic knee pain…
Your exercises must start to build “practical” or “dynamic” strength in your knees for your body to feel as it did before your knee injury.