It's important for people to know that this is more of a scientific book than a motivational or even a self-help book. Many technical terms abound, and some of the fluff can be trimmed without detracting from the book's message. But on the whole, Spark does a good job fleshing out the (surprisingly) concrete and wide-reaching benefits that exercise has, which kinda makes it a motivational book in that I'm more motivated to exercise now.