In general low-impact activities are good (swimming, cycling, walking).http://www.northshore.org/communityandevents/chat.aspx?id=6004&chat_id=3612:55 PMPost at 12:58 PMSandy Hayes: How is this different than total knee replacements in the past?<br/><br/>Dr. Michael O'Rourke (NorthShore): A total joint replacement is a procedure that places a new cap on the end of the femur(thigh) and tibia (shin