I had a knee replacement (Depuy Rotating Platform Knee in one leg) in 2010 and was concerned that it would adversely affect diving. I researched as much as I could on DAN, SCUBABOARD, and questions of Orthopedic Surgeons, nothing negative. I did my first weeks diving (boat diving in Cozumel) 7 weeks post op., after vigorous physical therapy to strengthen my leg and restore flexibility. After not experiencing any problems, my wife and I did 5 weeks of additional diving that year, including 3 weeks in Bonaire, exclusively shore diving. Did not have a single problem with the knee during that entire time. The lack of pain in the knee greatly increased my enjoyment of shore diving and the restoration of strength in the affected leg was a big benefit of the surgery overall. Key to the success was dedication to the post op rehab and effort to rebuild strength. I am now recovering from ankle fusion surgery (ankle was the cause of the knee problems) and look forward to getting back in the water after rehab.