Anyone else here have any problems with their knees no holding up as well anymore? I've found here lately that my right knee bothers the heck out of me quite often. I take the glucosamine/chondroitin combo. and it helps a lot. I also devote two days out of the week just to strengthen the leg muscles. Under the advice of a trainer on specific exercises that will help ease my knee pain. After doing umteen thousand kicks in my life I figured this to most likely be the problem to my knee but I'm curious about the rest of you all.:asian: