Hyaluronan
"It's 9 days before Iron man Louisville and I just had my second shot.  I'm 33, and ran 10 marathons last year and this year I'm feeling it.  I have received the steroid shots in the past but two weeks ago got the first Orthovisc shot. That was on a Friday and I swam 2.4 miles and biked 70 with no pain. This week I've run over 20 miles, one 13 mile run, and am still feeling good. The shot was no big deal - I just put ice on my knee the hour before I went in and right after and this helped. I didn't need any assistance walking after - it just feels a little swollen.  Oh well - time to go run!"