I agree that some folks might need physical therapy for their backs and don't want to diminish that point you're making.

When I see someone who lives a sedentary lifestyle complain about joint pain or muscular pain I really hope that they try to incorporate some sort of fitness plan into their life and not just look into a medical expenditures.

Just to re-iterate, if you're feeling some sort of debilitating pain, by all means go see a doctor. Just don't dismiss the importance of fitness in your life.