20190917-sleep.jpg

Man stretching out after waking up with alarm clock showing six ’o clock.

Media Folder

2019

Title

Man waking up

Caption

Some people need less sleep than others, and researchers are starting to understand why.

Credit

junce / iStock / Getty Images Plus

Description

Man stretching out after waking up with alarm clock showing six ’o clock.
OD

Site_Section

NIH Research Matters

Alt Text

Man stretching out after waking up with alarm clock showing six ’o clock.