Chin-Ups vs Pull-Ups: Does Grip Really Matter?

Pull-ups use an overhand grip (palms away). This puts your biceps in a weaker position, which means your lats have to do more of the pulling ^[1]. It's harder, and it's a slightly better lat exercise.

Chin-ups use an underhand grip (palms toward you). This puts your biceps in a stronger position, so they contribute more to the movement. You'll likely be able to do more chin-ups than pull-ups, and your biceps will feel it the next day.

Most people find chin-ups easier. Your biceps are in a mechanically stronger position to help pull your body up, which means your lats get assistance. If you're working toward your first pull-up, chin-ups are a great stepping stone.

This doesn't make chin-ups less effective — it just means you can typically do more reps or add more weight, which can actually lead to more total muscle stimulus.

This varies from person to person, but many people find chin-ups more comfortable on their shoulders. The underhand grip naturally puts your shoulders in a slightly more externally rotated position, which tends to feel better.

Pull-ups with a wide overhand grip can stress the shoulder joint, especially if you lack mobility. If wide pull-ups bother your shoulders, try a narrower grip or switch to chin-ups.

Contrary to gym lore, both build your lats effectively. The idea that pull-ups build a "wider" back while chin-ups build a "thicker" back is largely a myth. EMG studies show similar lat activation in both movements.

The real difference is bicep involvement. If you want more bicep work with your back training, chin-ups deliver. If you want to minimize bicep involvement and maximize lat focus, pull-ups have a slight edge.