Please direct me to find out about exercise programs for one year after open heart surgery to repair (and replace) two heart valves that may have caused my AFib condition that is currently being regulated with a coumarin regimen (INR rate has been on target for two months now. Presently doing stretch excercises with PT to build strength in legs after recently aquiring my first warnings that the new pains in my knees and tightness in lower back is moderate arthritis ... Oh boy ... What,s next?