If you have a teen, you have seen firsthand that children's sleep needs change over time. According to Kathy Gromer, MD, a sleep medicine physician at the Minnesota Sleep Institute in Edina, infants need roughly 16 hours of sleep each day. By age 4, children begin sleeping mostly at night, but they still need 10 to 12 hours of sleep. "Teens need 9 to 10 hours, although there is some natural variability," says Dr. Gromer.
My 11 month old daughter goes to bed at 10PM and wakes up at 7AM. If I put her to bed earlier, she wakes up earlier. She takes a nap from 11AM to 1PM and another from 5PM to 6PM. This is a schedule she has set for herself based on when she got tired. But she’s only getting 12 hours of sleep, and I’ve read she should be getting 14 or 15. Should I be worried? She doesn’t seem tired or cranky during the day.
A British study, for example, that followed more than 8,000 children from birth found that those who slept fewer than 10 and a half hours a night at age 3 had a 45 percent higher risk of becoming obese by age 7, compared to children who slept more than 12 hours a night. () Similarly, Project Viva, a U.S. prospective cohort study of 915 children, found that infants who averaged fewer than 12 hours of sleep a day had twice the odds of being obese at age 3, compared with those who slept for 12 hours or more. () Maternal depression during pregnancy, introduction of solid foods before the age of 4 months, and infant TV viewing were all associated with shorter sleep duration. ()
If you sleep more than the recommended number of hours per day, you may be a sleep drunk reports a new episode of The Dr. Oz Show. Dr. Oz explains to viewers how your sleep cycle works and what you may be doing wrong that leaves you feeling tired even after a full 12 hours of sleep.