BYT

Pull · Bodyweight · Add load

Chin-up

Hang from a bar with the palms facing you, hands about shoulder-width, ribs down.

Chin-up
  1. 1Pull the shoulders down before the elbows bend.
  2. 2Drive the elbows down until the chin clears the bar.
  3. 3Lower to a full hang without a swing.

Easy to miss: A half rep that never straightens the arms, or kipping to get the chin over.

Muscles

Copper on the figure is a prime mover. The softer tone helps.