Another reason some boomers may be seeking help, often asking about knee replacement surgery, is that they have greater expectations of their bodies. Once, people did not see a doctor until they could barely get around. “Now patients will say: ‘I can’t exercise. I can’t ride my stationary bike or regular bike or go for walks of one or two or three miles,’ ” said Dr. Mark W. Pagnano, an orthopedist at the Mayo Clinic in Minnesota.
New York Times by Eric Nagourney