the best way to add muscle is to lift as heavy as YOU can go,,and that means with out takin 10 min breaks between sets talkin to your friends in the gym
when you hear people tell you that you need over 45 min in the gym,,it is total bullshit. you only need 2 hours if you talk 5 min betweenn each set and lift too heavy for your size that you cant keep intensity.
you gotta work the muscle not the ego,, with the heaviest poundage possible. nothing will happen to your muscle if you wait too long between sets,,,or if you do half ass set while curving your lower back 40 feet up. it is nice to work the ego one every 2 weeks,,chose a day that all the hot chics/ hoes come in the gym and show up afternoon and come only to work the ego so you can feel good about yourself,,,rest of the time should be on the spot with out playing foolish ego games. meals also!! timing is everything when building bigger muscles.
notice in all the videos im participating the way i work the bench,,,i load it fast!!! and wait maybe a min or 2 max between sets. same for any other body part.