Fit Nation

How is it that Americans are more obsessed with exercise than ever, and yet also unhealthier? Fit Nation explains how we got here and imagines how we might create a more inclusive, stronger future.

If a shared American creed still exists, it's a belief that exercise is integral to a life well lived. A century ago, working out was the activity of a strange subculture, but today, it's almost impossible to avoid exhortations to exercise: Walk 5K to cure cancer! Awaken your inner sex kitten at pole-dancing class! Sweat like (or even with) a celebrity in spin class! Exercise is everywhere.

Yet the United States is hardly a "fit nation." Only 20 percent of Americans work out consistently, over half of gym members don't even use the facilities they pay for, and fewer than 30 percent of high school students get an hour of exercise a day. So how did fitness become both inescapable and inaccessible?

Spanning more than a century of American history,…