Answer: Nap
Clues: “Brief” and “Doze”
A study in the journal “Sleep Health” found people who take naps have bigger brains.
Our brains shrink as we get older. Taking short naps when you feel like you need them could help prevent it. Just don’t nap too long. 15 minutes is enough.
Previous studies have found too many naps could actually be harmful. Excessive napping can even be an early sign of dementia in older adults.
(CNN / The Guardian)