The downside of taking a week of rest every time you load a muscle is that many of the acute responses to training like increased protein synthesis, prostaglandins, IGF-1 levels, and mRNA levels all return to normal in about 36 hours. So, you spend 2 days growing and half a week in a semi-anticatabolic state returning to normal (some people call this recovery), when research shows us that recovery can take place unabated even if a the muscle is loaded again in 48 hours. So true anabolism from loading only lasts 2 days at best once the load is removed. The rest of the time you are simply balancing nitrogen retention without adding to it.
estratto da http://www.bodybuilding.com/fun/hst1.htm

qui mi sa che ha ragione 4ca. sui calcoli scientifici che no nfunzionano nella pratica....

cioe' sto dicendo,in pratica se quello che dice sto tizio fosse vero con un HD non si dovrebbe crescere...e invece...io continuo a miglioarare anche dopo 48 ore.. magari imparo qualcosa lo stesso, .......