A flawless weight training program should always promote
excretion of testosterone production. A well structured & strategic workout program will successfully produce adequate testosterone production, to induce muscle+strength growth.
2 highly intensive sets per exercise are ample to skyrocket testosterone excretion.
This strategy works best for smaller muscle areas like biceps, chest & shoulders. If your intensity levels are top, you'll won't feel like performing more than 2 sets per exercise.
You must perform highly intensive and quick in duration workouts to induce muscular development. Don't fall short with marathon training sessions. You will only tear muscles rather than grow them.