The pull-up is the king of bodyweight back exercises, building a wide, strong upper back and biceps with nothing but a bar.
FormTwin gives you a living 3D twin of your anatomy. Tap any muscle to see how to train it, and watch the muscles you work light up as you log your sessions.
Get FormTwin — free on the App StorePull-ups primarily target the latissimus dorsi (lats), with strong involvement from the biceps, rhomboids and rear deltoids. They're one of the most efficient upper-back builders.
Yes. The biceps assist on every rep, and the underhand chin-up variation recruits them even more — it's a genuinely effective biceps exercise.
Pull-ups (overhand) bias the lats and upper back; chin-ups (underhand) recruit more biceps and are usually a little easier. Both are excellent — many programs rotate them.
This guide is general fitness information, not medical advice. Muscle involvement varies with form, grip and individual anatomy. Consult a professional before starting a new program.