Admittedly, I’ve never heard of Lo-Wei, a unique exercise class that combines yoga, strength training and flexibility that stretched my body in ways my mind never thought possible. But it is only one of almost three dozen fitness classes, all part of the dawn-to-dusk workout, weight loss and education focus of the one-of-a-kind, all-inclusive Deerfield Health Retreat and Spa in East Stroudsburg, PA where my friend Kathy and I spent three nights recently.