Before: I had to superset pull-aparts to feel them
After: I could barely finish 20 (keep elbows straight)
Rear delt development and keeps the shoulders healthy. Credit to Kyle Hunt for his video. Much like anything, going through the motions has no benefits. You should do ALL things with purpose no matter how tedious the movement may seem.
I've been doing pull-aparts since I started lifting and NOW is when I'm discovering that I've been doing them incorrectly. This is the beauty of the journey, you learn something along the way.
Never think you know enough.
[youtube=https://www.youtube.com/watch?v=OwEV7btIr9Y]
[youtube=https://www.youtube.com/watch?v=JLZACzGra8Q]