Weight lifting to get cut like this guy takes a lot of study and dedication. You have to be nutritionally aware that most food is shit. You have to lift compound weights without getting injured, which means you're acutely aware of your body functions. The body pumps more blood, which means your brain has more blood carrying oxygen, a critical component of its function. You also become very aware that in the jungle the size matters more than anything else, and you see the shift in social dynamics around you. If you're not lifting or doing some sort of intense exercise, you're a certified bitch.