Are you sleeping too much? New research reveals how many hours adults really need for brain health

New research from Washington suggests the healthiest sleep window may be much narrower than official guidance, with both very short and longer nights linked to cognitive decline in adults with poor-quality sleep. Psychologist Greg Elder cautions that sleep length may be a marker, not a cause, while separate genetic studies show some people naturally thrive on far less sleep.

from Science News: Fresh Discoveries, Research & Breakthroughs https://ift.tt/GFA1bgr
via IFTTT