Is there any charge for this? I had total knee replacements in 2005 amd 2006 I have went back to my surgeon's that did my knees and they x-rayed my need & hips and they say there's nothing wrong but I get a pain in my groin and it goes down onto !y knrr when I go to get up from laying or sitting to standing I can't put weight on that leg knee or leg for a little while. I walk 3 miles a day which doesn't hurt,