4 doctors weighed in:
How many hours of sleep is normal at 90? 13 or so?
4 doctors weighed in

Dr. Michelle Zetoony
Internal Medicine - Sleep Medicine
3 doctors agree
In brief: Normal hourse sleep
Sleep at 90 is studied as is sleep throughout ages.
There is less deeper sleep as we age. The amounts are roughly the same 6-8 hours. Elderly people it may be normal to go back to napping in the day to make up for sleep disruption at night (one or two short naps > 1 hours). In 13 yr old the amount is about the same as 6-12 yr old (range between 9-12 hours of sleep) but the cycle is delayed.

In brief: Normal hourse sleep
Sleep at 90 is studied as is sleep throughout ages.
There is less deeper sleep as we age. The amounts are roughly the same 6-8 hours. Elderly people it may be normal to go back to napping in the day to make up for sleep disruption at night (one or two short naps > 1 hours). In 13 yr old the amount is about the same as 6-12 yr old (range between 9-12 hours of sleep) but the cycle is delayed.
Dr. Michelle Zetoony
Dr. Michelle Zetoony
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