Hi guys, first of all, sorry for my english, I hope you can understand the video.
Basically I've seen another form of bent hollow body position (FL PE1) that lacks of the necessary spine curvature. I've experimented this situation with lots of client especially with athletes coming from powerlifting. there is a too tight lower/thoracic muscles that prevent the correct spine flexion.
I've simply combined both passive elongation and active contraction to emphasize the curvature.
I applied this way over 3 ex-bodybuilder with solid lower back and with weeks ans weeks and patience they curvature became better then before.
I want to say that this way does not provide miracles but it could be a solution if combined with a correct and progressive approach on jefferson curl..
I hope it helps everyone is struggling with it.
tjhanks