You drifted off to sleep easily enough. But all of a sudden, it's 4 a.m. and you're wide awake. What gives?

To an extent, this phenomenon -- called middle insomnia, or difficulty maintaining sleep -- is normal. After all, sleep goes in cycles throughout the night, moving from deeper, slow...

It's not exactly the daintiest topic in the world, but it's certainly something everyone's experienced-- that sensation of pressure inside the abdomen, sometimes coupled by swelling in the belly. You know, bloat.

Most of the time, bloating is caused by seemingly benign actions. Maybe you drank out of a straw...

睡眠の問題が男性の性生活に大きな影響を与えることは知られている。だが、性生活には十分な睡眠が必要だという理由がもう1つあることが、新しい調査によって明らかになった。

Actress Angelina Jolie has undergone a preventive double mastectomy, she revealed Tuesday in The New York Times.

She wrote an opinion piece, titled "My Medical Choice," explaining that she underwent the breast removal procedure because she has a mutated BRCA1 gene known to raise a woman's...

Eating out for breakfast, lunch or dinner? Your meal likely contains more than half of your daily recommended calorie intake, according to a new study from Canada.

Researchers from the University of Toronto examined the calorie, sodium, fat and cholesterol levels of 685 meals and 156 desserts from...

Eating peppers, tomatoes and other vegetables from the Solanaceae plant family might help to lower your risk of Parkinson's disease, a new study suggests.

Published in the journal Annals of Neurology, researchers from the University of Washington found that the higher the consumption of vegetables...

Picking at your nails. Chewing your hair. Cracking your knuckles. Are you guilty of any of these?

They're "bad" habits" -- things we all do without thinking about it, that are probably annoying to everyone around us. Some are more innocuous -- who's really hurt when we clench our jaws,...

Do you know what the inside of an obese body looks like? Or lungs that have been blackened by years of cigarette smoking, or a heart that has developed scar tissue because of a heart attack?

Sometimes it's hard to understand what ills -- like high blood pressure, or obesity,...

I know what the inside of my ear looks like. Do you?

Chance are, the answer is no. But I had the opportunity to get a "Smartphone Physical" last week while attending the TEDMED conference in Washington D.C., which offers smartphone-assisted health tests -- all the routine tests...

We were happy to catch up with Dr. Regina Benjamin, M.D., the Surgeon General of the United States (and a HuffPost blogger!) at the TEDMED conference in Washington D.C. this week. Benjamin gave her first presentation during the opening session of the annual medical innovation conference on her...

Richard Simmons didn't get his "fitness icon" status by sitting around. The 64-year-old king of aerobics (and also a HuffPost blogger) brought the whole crowd at TEDMED 2013 to its feet with his dance-inspired fitness moves. We caught up with Simmons after the conference-wide workout sesh to ask...

Oh mindfulness meditation, how do we love thee? Let us count the ways.

Even though the academic research on mindfulness meditation isn't as robust as, say, nutrition or exercise, there is a reason why it's been around for literally thousands of years. And we're starting to get a better...

Today, April 1, marks the beginning of National Stress Awareness Month, which means it's time to put some extra focus on the role stress plays in our lives.

No one is immune to stress -- and science shows that how we react to it matters, too. A...

What We Tried: The DeskCycle

What We Did: Pedaled under our desk!

How'd It Feel:

Sarah's Take: Although I think it's more practical to cycle in shorter bouts throughout the day, I decided I had to try pedaling all day at least once before writing about this....

A baby who was "functionally cured" of HIV may have some adult company.

Fourteen adults have also been "functionally cured" after they were given combination antiretroviral therapy (cART) for their HIV infection. They have been able to stop taking the treatment while still keeping their...

Jorge Mario Bergoglio, who was elected to be Pope Francis Wednesday, March 13, only has one lung, according to news reports.

The 76-year-old from Buenos Aires needed to have his other lung removed as a teenager because of an infection, the Associated Press...

I recently had a come-to-Jesus moment with stress, and it involved hives -- and lots of 'em. Itchy, rashy, little itty-bitty bumps that first started on my upper arms, then spread down to my wrists, then appeared on my chest and thighs and calves, and eventually made their way to...

What We Tried: JumpLife's signature JumpDance class.

What We Did: Marching, jogging, sprinting, twisting, kicking and squatting, all on our very own mini trampolines to a soundtrack of dancey pop music with black lights and lasers.

For How Long: Classes are 45 minutes.

Where: JumpLife's TriBeCa gym. Many...

This review is part of our series on the most popular fitness tracker devices. Read the full story here.

If I was trying to make a significant lifestyle change -- like if I was sedentary and was trying to be more active,...

Valentine's Day is upon us, and what better time to reflect on the many benefits of being in love? Of course the emotional benefits are no secret, but there is a vast wealth of research showing the physical and mental benefits of coupledom.

Here, 10 healthy reasons to celebrate...