While sleep requirements vary from person to person, most adults need 7 to 9 hours of sleep at night to function at their best. Children and teens need even more. Older adults need at least 7 hours, but daytime naps can fill the gap.
seen from Germany
seen from United States
seen from United States
seen from United States
seen from United States
seen from China

seen from United States
seen from Venezuela
seen from United States

seen from United States
seen from United States
seen from United States

seen from United Kingdom

seen from United States

seen from China
seen from United States
seen from United States
seen from United States
seen from China
seen from China
While sleep requirements vary from person to person, most adults need 7 to 9 hours of sleep at night to function at their best. Children and teens need even more. Older adults need at least 7 hours, but daytime naps can fill the gap.