Attach a weight plate or dumbbell to a dip belt and put it on, then grip a pull-up bar with a supinated (palms-facing) grip, hands shoulder-width apart.
Hang at full extension with the core braced.
Pull the chest toward the bar by driving the elbows down and back.
Rise until the chin clears the bar, then lower with control to full extension.
Avoid swinging or kipping throughout the movement.