Both exercises work the back muscles. Apart from the back muscles, chin-ups and pull-ups also task the muscles in front of the body, like the chest and biceps. Because of the supinated grip ...

reading a list of the muscles pull-ups work makes it clear that the exercise effectively targets far more than just your arms, says Danelle Rivera, CPT, a certified personal trainer and group ...

She was previously an Associate Editor for the Health vertical for six years, and prior to joining PEOPLE worked at ... does five pull-ups and shows off her insane back muscles.