As the author of The New Rules of Posture, you might think I’d be a paragon of deep abdominal core strength. Sadly, not true. In fact, shortly after the book was published I was beset by an embarrassing bout of low back pain—a sure sign of low toned abs. And this wasn’t the first such episode—I’d been plagued by a back that “went out” pretty regularly for 15 years. Because I’ve been a proponent and practitioner of Rolfing© Structural Integration, I continued to assume that the pain was due to misalignment, and that more structural bodywork was what I needed. But I also saw the occasional chiropractor…