1) People who don't get enough sleep are more likely to have bigger appetite due to the fact that their leptin levels fall, promoting appetite increase (leptin is an appetite- regulating hormone).
2) Snoring is the primary cause of sleep disruption.
3) There are individual differences in the need to nap. Some adults and children need to nap. However, the majority of teenagers probably nap in the afternoon because they do not sleep enough at night.
4) When infants are put to bed drowsy but not asleep, they are more likely to become 'self- soothers', which enables them to fall asleep independently at bedtime.
5) We naturally feel tired at two different times of the day: about 2:00 am and 2:00 pm.
6) Newborns sleep a total of 14 to 17 hours a day on an irregular schedule with period of 1 to 3 hours spent awake.
7) Divorced, widowed and seperated people report more insomnia.
8) Exercising regularly makes it easier to fall asleep and contributes to sound sleep. However, exercising right before going to bed will make falling asleep more difficult.
9) Man is the only mammal that willingly delays sleep.
10) The higher the altitude, the greater the sleep disruption. The disturbance is thought to be caused by diminished oxygen levels and accompanying changes in respiration.