3 things will optimize your muscle gain: Resistance training, A calorie surplus, Adequate protein intake.

Each of these things plays off of one another. You can gain muscle in a calorie surplus without resistance training, but you’ll likely put on more fat than you will lean body mass if you don’t lift. If you don’t eat enough protein, you won’t put on as much muscle as you could.

Sleep. People aren’t getting enough. And that’s not an exaggeration. People are not sleeping nearly as long or as well as their bodies need. Our bodies NEED it to function, to recover, to fulfill our potential each day.