Insomnia is a common sleep disorder characterized by difficulty relaxing to sleep, but also difficulty staying asleep. Adequate sleep is considered to be that which lasts 7-9 hours without breaks, so that there is real mental and physical rest. People with insomnia...
Some claim that with four or five hours of sleep they are fine, that they do not need more sleep, and that they wake up refreshed and full of life. But is it really so? On average, it is estimated that people spend about a third of their lives sleeping. Sounds like a...
