I guess there is a middle ground where you do the things you find comfortable in doing being mindful of when you start reaching your limits. If the next day is a wipe out you have obviously done too much.

Recuperate try again doing a little bit more until you find "your level"

I always believe there is somebody worse off than you and be grateful for what you can do and achieve. It may be not what you could do before you are damaged but hey its a start