What's to explain? When you're shut down, you're just that: shut down. What you want to do is avoid getting shut down. You do that by not staying on for an irresponsibly long period of time and by using the proper recovery med's to get your endogenous test rolling again, namely HCG. Arimidex is again, an anti-aromatase which will disallow the conversion of test to estrogen. I personally feel that if you're on not-to-extreme doses of test and your body fat is not excessive you may not even need arimidex. It is probably a good idea to have some on hand, however, if you experience bloat. But on the other hand if you're using prop, bloat shouldn't be an issue.