Hollow Body Pullups

[pliant bolt]

recently switched from arched back pullups to hollow Body ones. I feel like there's lots of improvements I can make, but not sure what.

I can't post media so here it is:
https://youtube.com/shorts/Hk_JWAv9QTM?si=RZq6UJaf8Z_bE-6f

I also don't know how to stop swinging, as I do in the video

[odd thistle]

you arch before each pull up

its the strongest technique for a pull up but you should keep hollow during the whole movement to call it hollow

it requires strong scapular control to get out of deadhang