I start at the tender age of 4, until I was 16 and blew out my right knee and couldn't dance anymore sad
But here the worst part that knees "fine" now and two years ago I tore all the major ligaments in my left knee and surgery and PT and its still really weak,
It's hard having both of them weak, but it's the years of abuse that they've taken. I have arthritis in both of them now, as well as very little physical strength. They'll just give out on me with no warning, which in winter, not a good thing. =(
Then again, I'm use to them, so...