My physical therapist friend recommended this book about a new approach to walking for fitness and well-being. The primary author (it's written with his wife) has studied and practiced T'ai Chi for many years, and brings that sensibility to walking.
I'm generally not keen on the way self-help books sound—a little chummy, a little infomercial-y—and this book is no exception in that regard. There are also some science-y sounding assertions that almost make me wonder about the truth in the rest of what he writes. Things like how not drinking enough water can lead to a sinus infection—I suppose in the scenario he lays out, it's a possibility...maybe. Worse, he writes many times about how this kind of walking takes advantage of gravity: "Gravity pulls you forward, providing most of your forward propulsion" (pg 70). Last I knew, gravity is a downward force, not a forward one. This idea is repeated throughout the book.
But I like the essentials of this kind of walking, the body mechanics. My biggest takeaway was "Level your pelvis." I'm a long-time walker/hiker, and but this one action immediately engages my core and makes me feel stronger and straighter. There is a lot of information on integrating mindfulness while walking, which seems pretty solid. If this kind of walking appeals to you, he offers a "menu" of many different kinds of walks, and using this approach on hiking trails or on a treadmill. Lots of information, all very thorough.