This book gives advice and encouragement to women who have falsely come to believe that deterioration comes with age and there is nothing we can do about it. I enjoyed it and sometimes recommend it just for some parts of it and the main idea, but I still want to make the following comments: it belabored the value of exercise to the point where I felt like shouting "OK, I get it, I get...we need to exercise!". In a way, I kept waiting for the book to also talk about OTHER things too, but really this was the sum total focus of the book. I also thought that it would have been nice if the authors included some women doctors' perspectives too (it was weird getting all that advice on how we women should live our lives from two men who constantly refer to how they live theirs). I felt that the recommendation (strongly and repeatedly given) to exercise for HOURS a day, every day preferably, was fine for the retired author of the book who, as another reviewer also mentioned, was spending ALOT of time doing things that are not easily affordable by the average woman. He obviously has a huge amount of vacation/play time to enjoy high-end exercise, like biking trips and skiing trips...but that's not realistic for the kinds of lives most women, age 50-60 at least, really live in today's world (lives filled with the time demands of jobs combined with children, homes, care of elderly parents, grandchildren, etc.). It may be that this much exercise is what is really needed to turn back the clock, but I'm hoping that's not true- since so few of us have THAT much time to devote to exercise (the authors seemed to think that if you had your priorities straight, you'd find the time). The authors did convince me that one needs to add strength training to cardio training, and that cardio training is not enough. Just that knowledge and conviction alone may make me (and you) 'younger next year', if we actually do what is recommended.