The study appeared in the journal Sleep Health: Journal of the National Sleep Foundation.
Newborns (up to three months) need between 14 and 17 hours of sleep each day, while infants (four to eleven months) need at least 12 to 15 hours of sleep, researchers indicated.
For teenagers, aged between 14 and 17 years, researchers recommend at least eight to 10 hours of sleep. Adults should get no less than seven hours of sleep a day, but should not exceed nine hours.
Experts added that parents should make sure the school age children, with ages between six and thirteen get at least nine hours of sleep at night, with an acceptable sleep time of 11 hours.
Toddlers, with ages between two and six, need 11 to 14 hours of sleep, while children between three and five should have between 11 and 13 hours of sleep.
The panel of scientists covered a multitude of disciplines, and examined findings of 320 previous studies on sleep duration for healthy individuals, the effects of shorter or longer sleep duration, and health consequences of various amount of time.
The expert panel consists of 12 representatives, including Dr. DonCarlos, who were selected by medical organizations; and six sleep experts selected by the National Sleep Foundation. Dr. DonCarlos represents the American Association of Anatomists.
Dr. DonCarlos is a neuroendocrinologist who studies how hormones affect the structure of the brain. The section of the brain responsible for regulating hormone production is the hypothalamus. Hormones produced by the hypothalamus govern body temperature, hunger, stress responses, sex drive, circadian rhythms and sleep.
“We still have a great deal to learn about the function of sleep,” Dr. DonCarlos said. “We know it’s restorative and important for memory consolidation. But we don’t know the details of what the function of sleep is, even though it is how we spend one-third of our lives.”