I am scheduled to have surgery to replace part of the articular cartilage in my knee. Will I be able to return to my favorite sports and recreational activities?

This depends on the type of surgery you'll need and the recommendations of your doctor. It also depends on the success of the surgery. Even though many people get good results from surgery and are able to resume activities without other problems, you may be advised to choose activities that prevent extra strain where the articular cartilage was replaced. If an allograft surgery is done (one using donated tissue), most doctors recommend that their patients not return to high-level sports or recreational activities.