3.5 stars rounded down.

I read this book to research efficient energy-burn strategies, and the gist is that there is none. Our body is such a sophisticated system, which compensates for the "excessive loss" of energy masterfully, and more often than not, allows no argument.
The discussion of different types of exercise was interesting too.

Overall, the science is solid and fun to read, but at times it felt like the author had a bunch of anecdotes he wanted to mention in a chapter before his opinion, not the other way around, making the information flow a little hard to follow.
Also only limited new information for me, though the reference provides a good list of further readings.