I first heard about Richard Hittleman’s Yoga: 28 Day Exercise Plan from Ray Jardine in Beyond Backpacking
. He said that it was one of the things he did to prepare for a long hike. It’s not just a twenty eight day course, it’s a life long yoga program that will make you strong, flexable and healthy. The book is horribly dated; it’s from the seventies, but I can overlook that.