According to the “Sleep Health Journal” recommendations – the appropriate sleep time for people of different ages: 1 to 2 years old, 11 to 14 hours; 3 to 5 years old, 10 to 13 hours; 6 to 13 years old, 9 to 11 hours; 14 to 17 years old, 8 to 10 hours; 18 to 64 years old, 7 to 9 hours; ≥ 65 years old, 7 to 8 hours.