ya I get the back pumps so bad I can't walk. I have had to stop cold turkey to regain my life back. I couldn't move. I always get the back pumps any time I go heavy on d-bol, anadrol, and any test. the fatter I am the worse it is. when I was around 7% it was no problem.
so My only advise is to lower your body fat?!?....
squatter