The time and need for sleep are specific to each person, and there is no standard, even if there are recommendations for sleep times. The average adult sleeps 8 hours, but some people are satisfied with 6 hours, while others need 9 or 10 hours a night to feel rested. Differences in sleep time between individuals can be linked to genetic aspects. It's up to each individual to determine the number of hours needed to feel refreshed throughout the day.

For further information, we recommend that you consult :

- Institut national du Sommeil et de la Vigilance website
- The Morphée network website (health network dedicated to the management of chronic sleep disorders)
- The ANSES website (Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail)
- The Santé Publique France website, and its documents on sleep