Everything about walking as an ideal exercise--from how to do it and where, to health benefits and assorted walking gear--aimed primarily at people who have become set in their sedentary ways. Walking, as Ralston explains, is more than doing what comes naturally and putting one foot down in front of the other. How the foot is put down, posture, pace, length of stride, breathing, and arm swings are all part of a prescribed technique that makes walking an important aerobic exercise--one that many believe is more enjoyable than jogging without the risk of injuries. Ralston also suggests ways to design one's own program according to individual schedules and physical abilities, gradually increasing distance and pace. Separate chapters detail how walking can affect the heart, weight control, problems of stress, and generally make the body work better. And a special section gives advice and sources for shoes, assorted walking and hiking gear and information about walking clubs and race walking. Informative, encouraging and well documented.