Use the hips to string together big pull-up sets.

Time the hip drive with the pull. This is for conditioning, not strict strength.
The kipping pull-up still belongs to the lats, they drive the explosive pull that sends your chin over the bar, with the biceps assisting, but the hip snap out of the hollow position adds momentum that lets you cycle reps far faster than strict pulling. The rhythm between arch and hollow is a full body skill in itself. It earns its place in conditioning work, where stringing ten or twenty fast pull-ups matters more than grinding out strict singles.
Yes, but differently. The lats fire hard and fast on every rep and the total volume is huge, but strict pull-ups remain the better pure strength builder, most people benefit from training both.
A common standard is 3 to 5 strict reps first. The swing loads your shoulders dynamically at the bottom of each rep, and you want the strength and shoulder control to absorb that before adding speed.
You are pulling out of rhythm, usually yanking early instead of riding the arch to hollow snap. Push away from the bar at the top so the swing carries into the next rep, the descent sets up the next pull.




