Fit for health

Everyone agrees it's good to be physically fit, but exactly what should you strive for?

2006 is the 50th anniversary of the President's Council on Physical Fitness and Sports, an effort launched by President Dwight D. Eisenhower after he learned that more than half of America's young people were unable to pass even rudimentary fitness tests. Half a century later, the message is the same for people of all ages: Fit is good. But what exactly is "fitness," and how do you know if you're fit?

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