Skill:
Kipping pull up/C2B
Rx+: Kipping bar mu

If you dont have strict pull up , NO KIPPING pull up, do 4x 3negative pull up with 2 mins rest btw sets (12 sec lowering down)

If you cant do negative , work only on kipping technique and do 4x 12 reps ring row with 3sec down , 2 mins rest btw sets