evaluation and you’ll be able to make any good nutrition plan work. Pull-Ups Vs. Chin-Ups Which is Better? Let’s Ask Science. by Tyler Thomas | Pull-ups-vs.-chin-ups Tags: Pull-Up Bodybuilding Here’s what you need to know… Research says the pull-up and chin-up are equally effective. When it comes to activating the lats and traps they both work. Grip width is more important. When it comes to recruitment of the lats, the distance between your hands is the most important factor. Grip orientation does matter for bicep activation. Chin-ups will recruit biceps more than pull-ups. Coach yourself with cues. The best way to activate your back muscles is to use proper form.