Having different chronotypes, or being more active in the morning vs. afternoon, may play an important role in preserving muscle mass and strength, and metabolic health, according to a new study.

The researchers discovered there were not two distinct chronotypes but five—two kinds of early birds and three kinds of night owls. One group of early birds tended to suffer from depression while ...

Bad news, night owls: Staying up late can be bad for your heart. But there's good news, too.

Researchers have long divided humanity into two simple camps: the early risers and the late sleepers. You were either a ...

Adults — especially women — who stay up late have a worse cardiovascular health score and a higher risk of heart attack or stroke, according to a new study.

Wellness Wednesday: menopause, night owls, and the psychology of running late Hamlin had a tumultuous conclusion to 2025.

New research suggests night owls face higher risks to heart health later in life, driven in part by sleep, smoking, and daily ...