The new physical activity guidelines released last week by the federal government are aimed at keeping Americans healthy ? but what if you also want to be buff?

You can blame your energy crisis on a lack of shut-eye, but there may be other reasons you're slogging along like a turtle. Find out what's fueling your fatigue.

Get moving: The nation's new exercise guidelines set a minimum sweat allotment for good health. For most adults, that's 2 hours a week.

Do you always have to max out with weights? And will a week off from the gym wipe out your fitness gains? Smart Fitness answers your workout queries.

If you?re trying to shape up, there?s no shortage of exercise equipment and workouts promising to deliver bigger, better, faster results. But are they really all that?

Vice President Dick Cheney will undergo an outpatient procedure to treat a recurrence of atrial fibrillation, an abnormal heart rhythm involving the upper chambers of the heart.

The U.S. ranks 29th worldwide in infant mortality -- tying Slovakia and Poland but lagging behind Cuba. Ranked 1, 2, 3: Singapore, Hong Kong, Japan.

Bottled water is widely considered to be a purer choice than tap water, but a new investigation finds that this isn't always the case.

The Boston Red Sox may have a secret weapon that might help them in this year's baseball playoffs -- the popular phiten necklace.