WASHINGTON — Being a night owl can be bad for your heart. That may sound surprising but a large study found people who are ...

Bad news for those who love to stay up late.

So-called "night owls" may face a higher risk for heart attack and stroke, a new study published Wednesday finds.

A new study reveals that sleep types are more varied than simply larks and night owls – and questions the link between rising ...

People who are more active later in the day appear to face a higher risk of cardiovascular disease, according to a new study. Researchers explain why.

WASHINGTON (AP) — Being a night owl can be bad for your heart. That may sound surprising but a large study found people who are more active late at night — when most of the population is winding down ...