>Want to build stronger muscles? No problem, eat more protein and go to the gym

>Want to build a better brain? Well there are a lot of theories but nothing concrete.

What the Fuck. Is there anything that resembles a gym but for the brain? I want my brain to feel the same way my muscles feel after 6 months in a gym. What do I do? Why is there nothing thats proven for the brain the same there is for muscles (gym).