Zercher Holds Question

Hi coach,

Real fast one for ya- I read your articles in Zercher holds and have added it to the complete power look workout. I’m not sure I’m getting a strong “pop” from it though. I’m doing 4 sets of 9 seconds, and I’m feeling it much more in my upper body more so than abs (not much there at all)… I can provide a video at some point but it sure feels like I’m standing erect and squeezing my stomach and flutes… I was curious as to if this is a common issue and an easy fix as I’ve done this wth various weights (135-225) and for a few weeks!