Just going to post my problem here and maybe someone recognizes it and can tell me what he did to fix it or maybe people can post suggestions, ideas and or advice.
Basically i think my Ql muscles are in pretty bad shape, everytime i do something that heavily involves my abs, my ql muscles will get really stiff and it gives me an annoying back pain.
My own theory is that i might have weak obliques and that everytime i need to use them i compensate with the ql muscles.
Anyway everytime i deadlift, squat, do planks etc my ql muscles stiffen up and are killing me.
I want to make a plan now to deal with this situation so all input is welcome.