Hello all, I'm sure everyone has seen posts pertaining to this subject before, Ive been cycling for close to a year now, first on a new GT MTB, and my latest purchase, a Specialized Allez Sport triple. I'm 47, and to put it bluntly, my knees are ravaged from years of motorcycle dirt biking, torn ACL's both knees, one is totally shot, and will need replaced within the next 5 years or so. Anyway, this is the reason I took up cycling, low impact, and doesn't really bother my knees. I am really getting into the new road bike, and yesterday was my first ride over 20 miles, 21.2 to be exact. I felt good after I got done, felt I could have went further, but as the day went on, I started to get pretty sore, this morning, they feel a lot better. So my question is (and I know I need surgery, so don't go there) I really enjoy this new sport of mine, and ride as often as I can, is it OK to ride, say today, without compounding my problem, and work through it, or should I give them a couple days of recoup? I just started taking the Glucosamine/Chondroitin stuff to see if that may help, maybe just a shorter ride? any advice well taken.....