I’m surprised you put on so much weight so fast. Obviously you were eating a lot. Anyways, the bulk of the muscle gain in a cycle occurs usually between the third and sixth week. After that rapid gains in strength and mass that you typically see and hear about trail off to nothing more than ‘natural’-like gains.
this is intresting.
what happens after 6th week that slow down to “normal level” the mass gain?
and if all is done between 3rd and 6th which are the needs to extend the cycle to 10-12 weeks?[/quote]
It is the law of dimminishing returns.
I am not going to tell you though that it is worthless to continue after the 6th week, and gains don’t all of a sudden slow down to a stand still at that point, however they do begin to slow at that point - i.e. 60-70% of your gain for example will occur in the first 6 weeks of your cycle, and the other 30% may occur in the following 1 to two months after that.
Obviously if you are a competitive BB then you want to stick on the cycle for the other ‘30%’, however if you are a casual user, probably best to come off at the 6 week point or sooner to keep your hpta as healthy as possible