You probably don’t need us to tell you that the pull-up is just about the toughest bodyweight exercise there is. If you’ve ever attempted to knock out a set in the gym, or just pull yourself up over a wall out in the real world, you’ll know the demands it places on your back, shoulder and arm muscles.In the back it’s the lats, traps and rhomboids that bear the brunt of the effort, while you can challenge different parts of your arms by changing your grip.
