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(1)Recommended sources of sleep time by age group The National Sleep Foundation of the United States
(2)Recommended Sleep Time
(3)7 to 8 hours for senior citizens aged 65 or older
(4)Adult 26 to 64 years old 7 to 9 hours
(5)Young people 18-25 years old
(6)Youth 14-17 years old 8-10 hours
(7)9 to 11 hours of school age Children 6 to 13 years of age
(8)10 to 13 hours preschool age children 3 to 5 years old infants 1 to 2 years old infants 4 to 11 months old
(9)11 to 14 hours
(10)12 to 15 hours
(11)14–17 hours, newborn baby 0–3 months
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