My first memory of engaging in physical activity for any reason other than "play" occurred in high school gym class. Up to that point, the only exercise I did surrounded a sport or game. There I was, ...

Rock climber Alex Honnold made headlines in June when he climbed 3,000 feet to the top of Yosemite's El Capitan without a rope. But long before he stepped onto those granite cliffs, Honnold, like many ...