I'm not sure what "neutral back and shoulder" means, but I like to put my upper body into the yoga position tadasana, aka mountain pose (this can be Googled for a much better description than I can give). Straight back, shoulders/ears/hips aligned, pelvis rotated (folded in the groins) for no bend at the waist. It seems easier, and the chest stays open for breathing. It is midway between the two positions LGHT shows.