So I know doing a planche push-up with the body relaxed on the ground is much harder than lowering and pushing up due to the lack of stretch reflex and having to generate tension from the relaxed position. For instance, I can do 3 reps of full planche push-ups the regular way on a good day, but only barely one rep of a straddle half lay PLPU starting from the ground to show you the massive difference in difficulty.
I was wondering if doing more PLPUs from the ground will build much more strength overall and also increase the ability to do them the regular way of starting from a planche. I assume so, but I'm not sure if it just teaches your body how to generate more tension from a relaxed position to help you do the concentric. Admittedly, I also don't know much about the stretch reflex other then that it is activated right after an eccentric contraction and that it takes about a 3 second pause after a negative to get rid of it.
I'm currently still using GTG with PLPUs starting at the top and only occasionally doing singles starting from the ground.