Individual needs for sleep vary. A good night's sleep is whatever allows a person to feel rested, refreshed, and alert during the day. Some people need 9 to 10 hours, while others only 6 hours. Insomnia is a persistent difficulty in obtaining adequate sleep. Symptoms can include difficulty in falling asleep, frequent awakenings with difficulty falling back asleep, or poor quality, light sleep. Between 25% and 30% of adults suffer from insomnia. Insomnia can have many causes, including stress, depression, anxiety, or poor nutrition.
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Salvation For The Sleep Deprived The Ultimate Guide To Sleeping, Napping, Resting And Restoring Your Energy. Of the many things that we do just instinctively and do not give much of a thought to, sleep is probably the most prominent one. Most of us sleep only because we have to. We sleep because we cannot stay awake all 24 hours in the day.