In order to get my Eskrima students to flatten the shoulder blades, I have tried various approaches to explaination. One of these is to have them stand in a relaxed, slightly slumped posture, feet somewhite widely separated, and tell them to imagine that they are picking up a barrel, that is about as high as they are. In order to do this, they must embrace it around the middle, about the height of their elbows. I ask them to hold this, keeping the body fairly upright, butthe knees flexed forwards. As they hold this posture, I tell them to relax to their utmost. This gets them started on the proper alignment. It is not enough, and I use a number of different approaches to try to make them understand what I am driving at.