The brain must change how it perceives movement in the the body and the body needs to move in more beneficial ways. You need to move differently or not move in ways that have caused pain, whether from injury or chronic misuse. Weakness and wearing down from lack of use also causes these conditions.
The brain and body would welcome the benefits of ease of motion, improved range and flexibility (without over-extending), equable and balanced alignment and posture; no single part carrying the burden for the rest.
The brain must have an initial idea or concept to go on. It normally doesn’t shift unless it tries. It will tend to do what it always does and revert to views to which it is habituated. The body does also.
How does change occur? By learning a new way of movement and practicing over and over. Sooner or later you will gain insight … fresh insight and renewed feeling.