HI Guys going to start the 5x5 advance routine tomorrow but i quite dont understand when you reach the 5-8 week how the heel to you gain muscle mass if your only doing 3 rep in all workouts ,i believe that to achieve good muscle mass you must be doing reps from 5-8 and for STRENGHT reps from 1-4, so from the 5th week onwards your only donig 3 reps!!!!. Can anyone tell me if i am correct if so i may not do this routine my aim is to add musle mass for the next 12 weeks not only for 4 weeks

Thanx Jay