New guidelines for sleep developed by the National Sleep Foundation and other experts were published in 2015 in the international journal Sleep Health: Journal of the National Sleep Foundation. The Foundation sets the sleep duration needed for each age group based on age, and researcher Don Carlos and other experts analyzed 320 reported studies on the duration of sleep in healthy individuals and the effects of lower or longer sleep duration on individual health. The researchers point out that we still have a lot of research to learn about the function of sleep later in life. Today we know that memory consolidation is a very important brain process, but we don’t know exactly what the function of sleep is, and we don’t even know how long it is best to spend sleeping at different ages? Here are the recommendations for sleep duration as recommended by the National Sleep Foundation Newborns (0-3 months): 14-17 hours of sleep per day (previously 12-18 hours); Infants (4-11 months): 12-15 hours of sleep per day (previously 14-15 hours); Toddlers (1-2 years): 11-14 hours of sleep per day (previously 12-14 hours); Preschoolers (3-5 years): 10-13 hours of sleep per day (previously 11-13 hours) hours of sleep per day (previously 11-13 hours); school-age children (6-13 years): 9-11 hours of sleep per day (previously not 10-11 hours); adolescents (14-17 years): 8-10 hours of sleep per day (previously not 8.5-9.5 hours); young people (18-25 years): 7-9 hours of sleep per day; adults (26-64 years): 7-9 hours of sleep per day 7-9 hours per day; Older adults (65+): 7-8 hours per day.