A few years ago, yoga instructor David Thornton, asked me whether I’d been thinking about the chakras when I described the posture zones in The New Rules of Posture.  Here’s what I wrote to David:  I understand the chakras to be energy vortices located along the body’s central energy channel that affect all aspects of the person—body/mind/spirit.  The chakras have spiritual or emotional content that impedes the free flow of energy through the core of the being…