This started out as a kind of Freakonomics ‘everything you thought about exercise is wrong’ type of book, then goes into a lot of backgound on the author’s specialty (paleoanthropology with an emphasis on human body development), and finishes the book with a, well, actually, exercise IS good for you. Honestly, this is one of those books where watching an available 10 min talk from the author on Youtube is just as informative as going through the whole book, and if one is interested in a certain type of exercise you’re better off reading a specific book on that topic. I thought that perhaps it would reveal better information on better work practices, but again it’s likely advisable to seek out a specific book on work ergonomics.