Pull-ups wouldn't be the move of Marines and movie badasses if they weren't hard. But nailing your first one is even harder when all you do is try, and fail, at doing a strict version of the movement from the get-go. That's because as you ascend through your pull-up motion, different muscles are getting hit in different ways. So if you can't pull yourself up out of the first portion of the movement, you'll never arrive at the second portion, and so on. So instead, you need to learn to scale. Here are three movements to get you doing a full-blown, strict-as-hell, Marine-worthy pull-up — eventually.