101 Questions about Muscles, 2nd Edition

How much of a person’s body weight is made up of muscle? Can you learn to control your heart rate using your mind? How does taking steroids affect muscles—and why are steroids dangerous? What causes hiccups? The answers to these puzzling questions—and 97 more—are revealed in this thought-provoking book about muscles. From basic information on how muscles work to more complex issues such as how dis...