AJ, what are your thoughts on the subject? to what extent do you think downgrade exists and occurs?
I've been fairly blunt on the subject many times on here before and I believe it is one of the biggest excuses people make in regards to their lack of growth and success as a bodybuilder.
Like GH15 said, so many guys out there use UG garbage and this is a large part of what leads to the myth of receptors being downgraded, flooded, etc. Here's why.
Any guy who buys hormones from a UG supplier, assuming it is real...most of the time it is real...however, most of the time it's severally underdosed and more often then that every bottle, every vile and amp is underdosed test. It may say deca, tren, etc but in actuality is is underdosed test. So the guy does the cycle, he grows...anyone will grow off a small minute amount of hormones the first time...a lot no, but it happens. But if you want to be big, really big, make continued gains the crap has to be real. For many guys when the initial growth stops they immediately say something about receptors...why not, it sounds good right? The truth of the matter, their gear was junk...that's all the problem there is.
Part of the problem with most guys understanding this is they view their receptors like a bank. For example, the drugs go in, they pile up in the receptors and sit there until the job is done...eventually the receptor runs out of room. This is a rough example but all I can think of at the moment. Obviously this is ridiculous, it's no differant then saying that every time you drink a whey protein shake the whey's amino's mound up inside the muscle bellies until their is no room left and that you need to stop taking in protein until they can refresh...this makes no sense so why would the other?
Again, I realize this is a very rough example, and there are a lot of "technical" things that could be added in to give it sound backing. However, when it comes to that sort of thing, sometimes simple ways of explaining do a better job.