The major differences between chin-ups and pull-ups — and what muscles are worked for each exercise

Because of the differences in grip, chin-ups mainly work muscles in the front of your body, whereas pull-ups focus on the back muscles.
Well+Good

Pull-Ups Are More Than Just a (Major) Fitness Flex—They Also Work a Ton of Upper-Body Muscles

But lifting your entire body as you dangle from a bar is no easy task, which is why pull-ups can be, well, hella intimidating. Still, don’t shy away from the challenge—they’re infamously tough (and ...
Everyday Health on MSN

Armpit Pain During Pull-ups

Armpit pain from pull-ups may be due to muscle injuries in your teres major and latissimus dorsi muscles. Here’s how to ...