The heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is always at work. It pumps blood through arteries to deliver oxygen to organs and ...

It's a common yet uncomfortable sensation when the heart beats rapidly for a second or two and then becomes normal. Whether ...

You know the feeling. When you first see your crush and your head starts spinning, your palms get sweaty, and your heart begins beating a mile a minute. Is this love? Or is it … an arrhythmia? The ...

Sitting quietly at your desk, watching TV, or lying in bed at night, your heart should be taking it easy – beating steadily and calmly at somewhere between 60 and 80 beats per minute for most healthy ...

Heart rate variability during sleep can predict stroke, depression or cognitive dysfunction years in advance, according to new research presented at the European Academy of Neurology Congress. The ...

About 10% of Americans say they have chronic insomnia, and millions of others report poor sleep quality. Ongoing research has found that bad sleep could lead to numerous health problems, including ...

Your heart is always active, but it is resting when you are calm and sitting quietly for extended periods. During this ...

Heart rate variability is the time variation between each heartbeat that can show how your body handles stress and recovery.

How healthy is your heart? Sometimes we won’t know until we’re mid-sex or sleep. Here are the signs to look out for. This month happens to be American Heart Month. And while you may be fit and healthy ...