In the last 50 years significant numbers of men and women take little exercise in the course of their occupation. The computer keyboard, the rise of private transport, the world by television, household "labor saving" devices mean that with the minimal of physical effort people work and play. The benefits of doing regular exercise include a reduced risk of: heart disease, stroke, bowel cancer, breast cancer, osteoporosis, and obesity. In addition, many people feel better in themselves during and after exercise. Regular exercise is also thought to help ease stress, anxiety, and mild depression. This book presents the latest research in this growing field.