An isolation movement that trains your traps. Your lats and middle back help out.
Muscles you'll work
TrapsPrimaryLats · Middle BackSecondary
How to do it
Take a pronated grip on a pull-up bar.
From a hanging position, raise yourself a few inches without using your arms. Do this by depressing your shoulder girdle in a reverse shrugging motion.
Pause at the completion of the movement, and then slowly return to the starting position before performing more repetitions.