Overall, Cooper's book on Aerobic Fitness has some excellent info on beginning a fitness program if you are a beginner to exercising. However, a lot of the information that has been compiled is out of date from the late 1970's and early 1980's. Do not use this book if you are designing your own Exercise Program. Do more research on the internet by simply using the search word "exercise"; you will have a wealth of current knowledge and numerous references to review. Do not start an exercise program without first consulting with your doctor.