If you wake up still tired you may have a sleeping disorder. It is a common disorder and you shouldn't feel worried about it. If you don't feel tired when you wake up you were just really tired. If you have any more questions ask me on my bio page.
They can sleep for a couple of hours in the day and 12 hours at night.
12 hours a day, 8 hours a night.
About 12 hours well, that's how much you should get
9-12 year olds should sleep 10-12 hours and 13+ should have 8-10 hours sleep
A 12 year old should have 8 to 9 hours of sleep each night. Sleeping to little or to much is unhealthy, especially when you are maturing.
They should usually have around 9 to 9 + a half hours sleep per night.
Eight to ten hours of sleep per night.
badgers r nocturnal so they will sleep all day (about 12 hours) and hunt at night
6 to 8
Cheetahs sleep for about 12-13 hours at night and may take naps during the heat of the day.
they sleep all day and night and only awake when need be e.g if they are hungry or they are moving territory
at age 76 you should be getting between 10 and 12 hours of sleep each night