Test your ticker, upgrade your eyes, strengthen your knees, eat smarter, and more with our interactive map of the human body.

Run, rat, run. And keep track of everything on your computer, while you're at it.

Uncle Sam's Presidential Fitness program now endorses video games. When did we go so soft?

From running, to cycling, to triathlons, the best all-around event specific training guides on the planet.

Does a physically fit president make the for the fittest president?

Outside's 2002 National Magazine Award-winning five-step fitness program.