When many people think of fitness and the gym, they picture meatheads doing countless arm curls, staring at themselves in the mirror.What’s truly unfortunate is that I very rarely see people in my gym doing deadlifts or proper squats, and I’ve probably only seen a handful of people (in a year and a half) doing legitimate pull ups.As far as I’m concerned, if you’re not doing deadlifts, squats, and pull ups and you want to “build muscle,” you’re leaving behind a TON of progress and gains.