from what i read i think the therory of time off=time on was directed at what was thought to be the over saturation of receptor sites d/t continuous use of AS,and that the continued use made them less sensitive,i read a recent study in MD that proved this therory to be incorrect and that the receptors where no less receptive at the begining or at different intervals or when therapy was dicontinued,and i think as dr m has already said that it is used as a general rule of thumb to gage your testes resuming their normal function,every one responds and recups differently so the only true measure is pre and post levels,you also have to take into consideration decreased production of test w/ age,and as i guys think you will agree there truly is no 100% safe way to do AS we put ourselves at risk w/ each inject,so you have to ask yourself is it worth it,for me the answer is yes,
S.R.