Ok I seem to have got this now.
so, slpe1/im
this is my archbody hold. I have put in my first set of 4 X48 and my last set of 4X48
I notice that in my last set the arch isn't there anywhere near as much, the time is almost there.
Would I need to increase spinal mobility as well? or is this just purely my endurance not lasting the total time required.