[Answer] How much nightly sleep is recommended for the average healthy adult?
…The National Sleep Foundation recommends seven to nine hours of sleep a night for adults between 18 and 64 years old. Newborns are advised to sleep 14 to 17 hours; infants, 12 to 15 hours; toddlers, 11 to 14 hours; preschoolers, 10 to 13 hours; school-aged children, nine to 11 hours; and teenagers, eight to 10 hours. Generally speaking, adults over 65 need the least amount of sleep — seven to eight hours a night.
How much nightly sleep is recommended for the average healthy adult?