You've heard the saying: "Fool me once, shame on you, fool me twice, shame on me." Shame on me, then, because after writing a lukewarm review for Boot Camp Workout, also by Five Star, I have the same to say about this one. While the workouts presented are credible, the book is very poorly done. Explanations of the exercises are imprecise, and the accompanying photographs sometimes contradict the text. Some exercises in the workout plan are not explained; for example, the workouts often call for you to perform a "Dirty Dog", yet nowhere in the book will you find an explanation of what a dirty dog is.The workouts are VERY intense. I'm 36 and in pretty good shape. But after 1 week of following this plan, I was too sore to move. If you are not already in excellent condition, then I can't even recommend this book for its workouts.