Choosing Exercises for Pain Patients

When choosing exercises for a patient with acute or persistent pain, what are some of the important factors that you are looking at to help you decide on those exercises? A ton that gets bandyed abot quite a lot is it's important to fit the cise to the person, not the person to the exercise. If somebody has an expect on that an exercise that their physioterpis or declination is going to give them, if they have an expectation that that is going to be a pain relieving exercise, and then it ends up not being so, then that could be deemed as a failure. So often, rather than getting kind of bog down with the minutia