Abstract

Are you sitting comfortably? No, really, are you sitting comfortably? At this moment are you at all aware of your body and the state of relaxation or tension within its various parts? Are you gripping this book more tightly than is really necessary to hold it up? Is your sitting position such that extra strain is being put on your neck and shoulders in order to hold your head upright? Are you frowning unnecessarily? How do you know any of this?