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Is 4 hours of sleep enough? Experts explain what happens to your body when you sleep four hours, health effects of sleep deprivation and tips to improve sleep.
REM, stage 4. During REM sleep, your brain is almost as active as when you’re awake. ... Most people get around 1.5 to two hours of slow-wave sleep if they get eight hours of shut-eye.
Newborn. 0-3 months. 14-17 hours (including naps_ Infant. 4-12 months. 12-16 hours (including naps) Toddler. 1-2 years. 11-14 hours (including naps) Preschool
Hours of sleep recommended for each age group [93] Age and condition Sleep needs Newborns (0–3 months) 14 to 17 hours Infants (4–11 months) 12 to 15 hours Toddlers (1–2 years) 11 to 14 hours Preschoolers (3–4 years) 10 to 13 hours School-age children (5–12 years) 9 to 11 hours Teenagers (13–17 years) 8 to 10 hours
As sleep time decreased over time from the 1950s to 2000s from about 8.5 hours to 6.5 hours, there has been an increase in the prevalence of obesity from about 10% to about 23%. [2] Weight gain itself may also lead to a lack of sleep as obesity can negatively affect quality of sleep, as well as increase risk of sleeping disorders such as sleep ...
A nap is a form of biphasic or polyphasic sleep, where the latter terms also include longer periods of sleep in addition to one period. For years, scientists have been investigating the benefits of napping, including the 30-minute nap as well as sleep durations of 1–2 hours. Performance across a wide range of cognitive processes has been ...
Some people only need six and a half hours of sleep every night, Atwood adds, whereas others may need more than nine hours to feel rested and function the next day.
You may feel like you can doze off during everyday activities such as watching television, ... Infants (4 to 12 months) should sleep 12 to 16 hours per 24 hours. Children (1 to 2 years) should ...
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