Question regarding hand placement when going through the progressions for the fundamental moves. For some context, I've been using parallets up to this point to train for the manna. I've been keeping my back straight and focusing on pushing my hips in front of my wrists, and had felt like I was making progress with the horizontal middle split hold position. Then, I decided to try to do it without the parallets, and to just keep the hands facing backwards... Boy, what a difference that made.
My shoulders started bunching up forwards, my hands were on my wrists again and I felt like I'd been sent back to square one. So I said hey, wait a minute, and tried for an L sit with the hands facing backwards. Similarly, my previously strong seeming L sit (was able to hold a 15 second sit with my legs at just under 90 degrees, facing the ceiling, while using parallets), had been body slammed backwards. It was like my hip pressing ability had vanished. So I started looking around for training methods.
Regarding training for the manna and L sit, I've seen differing training methods espoused by different trainers. Steven Low says that the way to train for the progressions of the manna is to do what I just mentioned - starting with the L sit with the hands facing backwards, and working up to the horizontal middle split hold from what would be equivalent to the advanced parallel bar L sit, but again, with hands facing backwards.
So my question is this - is there an advantage, or is it disadvantageous, or not relevant to manna progression to have the hands facing backwards during L sit progressions? And could anyone tell me a bit more about why its so much more difficult to do the L sits with the hands facing backwards? Thanks a lot.