Are you an avid walker looking to take the activity to the next level? Perhaps you're a runner who wants to find a way to end aching joints and muscles without giving up great, heart-pounding workouts. Or, maybe you're a cross-trainer in search of a new, low-impact workout that will burn calories and improve your fitness level. If you're serious about fitness and seeking a better way to workout, then Walking Fast is for you. This complete guide provides...