Most causes for waking up with a racing heart aren't serious. But some may require treatment. Learn the causes of heart palpitations and when to see a doctor.

Researchers found that when subjects slept during the day and were active at night, it had a negative impact on markers for ...

Helping yourself get to sleep isn’t just about avoiding screens before bedtime. From cognitive shuffling to sleep-restriction ...

In TODAY.com's Expert Tip of the Day, a heart doctor shares his sustainable weight-loss plan that’s helped him eat fewer ...

New research suggests that eating five cups of fruits and vegetables during the day may significantly improve sleep quality ...

Why shift work is classified as a probable carcinogen - and what Dr. Kirk Parsley wants every night shift worker to understand.