I don't understand. My endurance is just dropping like a rock lately. I can't lift as much weight as I used to be able to, and I can't do as many exercises as I used to do. I just get so tired and find myself quitting. I just don't have the physical strength to continue lifting. I have taken a break a while ago, but I dunno...it seemed to start when I started using cellmass creatine. Is there at all a chance it has something to do with that?