@cj762
My experience with excercisr has been that PMR at 80 is the “d…ned if you do etc.” condition. Keeping muscles in the same or static position (e.g.sitting/driving with one leg in the same position for a long time) causes pain from doing nothing, Exercise makes it go away. Overdoing an activity/overuse of a muscle may cause pain which sometimes doesn’t show up until the next day but goes away with rest.