Nope, not weights — this is the one bodyweight exercise you need to strengthen your pull-ups instead

Man hanging from a pull-up bar during outdoor workout.

Strengthen your shoulders and prepare for pull-ups using the scapula pull-up exercise during warm-up routines. 

This bodyweight move is commonly used as a preparatory mobilizing exercise before upper body workouts, and in particular, any exercises that use a pull-up bar — think muscle-ups, dead hangs, overhead presses, pull-ups and kipping.