I love riding my bike! I am almost 60. Have had a partial left knee, total right knee (8 weeks ago), total left hip and resurfaced right hip. All four surgeries since age 50. Today, I rode 8 miles with my 20 year old son running alongside me. Felt great. I am sure I'll pay for it tomorrow with pain and swelling. I am icing and elevating it now. Eight weeks seemed to be the turning point for me with this surgery. Looking forward to many more bike rides as I am retiring in June!