There’s a number that controls your fitness destiny. And odds are you’re not doing enough to improve it.

Sugar has become a trillion dollar health care problem. But are athletes at risk?

Sometimes, what's common knowledge doesn't need scientific validation. Listen to the advice of these two legendary athletes and remember that even the strongest of us need a little rest and relaxation.

Need to manage your cholesterol while you exercise? Think twice before taking statins.

Can you lose weight just by downing a glass of water before dinner?

The formula to weight loss is simple: eat less and exercise more. So why are these simple things so impossibly hard to do?

Paleo diets are supposed to be bad for your endurance. What if they aren't?

Is there something special about the physiology of ultra-distance athletes and what can we learn from how they train?

A new record has been set in the marathon, edging us 15 seconds closer to the two-hour mark. Will we get any faster?

We're told to exercise to stay fit and healthy, but sometimes training routines turn deadly.

Exercise isn't enough. To remain healthy, you need to build athleticism. Here's how.

Not all celebrities are train wrecks. Sometimes, they're perfect examples of what we all should be doing to stay healthy and happy.

We know too much time spent on the couch is deadly, but what about the hours you spend in the saddle or on the trail? Is there really such thing as too much exercise?

Interval training is no longer the secret of the pros, but that doesn't mean you're doing it right

Forget about the wonder drugs. The elixir of youth and the "cure" to Alzheimer's and dementia may turn out to be exercise.

The weight-loss industrial complex keeps pumping out diets, but a new study suggests it's time to radically rethink our approach to eating—and refocus on the basics

A new look into the numbers suggests that some heavy coffee drinkers are more than twice as likely to die as their peers. Should you be worried?

Just hit the road to stay healthy? Not quite. If you're working a desk job, exercise may not be enough.

What if we're blaming the wrong people for doping? A new look into why athletes choose to dope raises serious questions about the fight against drugs in sport.

Eat less to go faster? Not quite. Skipping breakfast may cause you to gain weight and live a shorter life.

The Olympic 10,000-meter champion Mo Farah has challenged Usain Bolt to a 600-meter race for charity. Who's the favorite?

Not a week goes by without a study pegging weight gain to genetics. But the connection between heredity and making your racing weight may be more tenuous than it appears at first glance.