Most of the developed world is experiencing an aging population. In America alone, an estimated 45% of the total population is over the age of 40. When this aging demographic is combined with the current concerns over healthcare cost and availability, it is easy to see why more individuals are expressing an interest in staying fit as they grow older. In Fitness at 40, 50, 60 and Beyond, author Michael Spitzer has distilled decades of medical research, diet guidelines, and exercise routines into a complete program that offers an effective and time efficient way for readers to get in far better shape than they thought possible. The book begins with a detailed look at what happens inside the body with the passage of time. Topics covered include the age related aspects of muscle tissue atrophy, slowed metabolism, weight gain, bone loss, heart and lung function capacity, sexual changes, hormone decline, anxiety, depression and more. After examining these effects of aging on the body, the book then details a program of dietary planning and 3-day-per-week exercise regimens that can produce amazing fitness results in as little as 16 weeks. This 432 page book is illustrated with 260 photographs. Every exercise is clearly described with accompanying photos that demonstrate both proper and improper technique. Diagrams, tables, and charts are also used to explain meal plans, recipes. and other principles. At the end of each chapter, summaries are provided that can be copied and carried for quick, easy reference. Although written to address the specific issues that concern older individuals, the diet and exercise advice provided is useful for people of all ages. In this regard, the book may be considered by some as the "definitive new book for fitness and weight loss"