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https://www.youtube.com/watch?v=xrlqDgThA3c

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Stages of Sleep - non-REM, REM, Sleep Studies

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Rapid eye movement (REM) sleep, or stage R, usually starts about 90 minutes after you fall asleep. Brain activity increases, your eyes dart around quickly, and your pulse, blood pressure, and breathing speed up. This is also when you do most of your dreaming. REM sleep is important for learning and memory.

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|13-18 years | 8-10 hours per 24 hours|
| 18–60 years | 7 or more hours per night|
| 61–64 years | 7–9 hours|
| 65 years and older | 7–8 hours|

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1. Stick to a sleep schedule. Set aside no more than eight hours for sleep.

2. Pay attention to what you eat and drink. Don't go to bed hungry or stuffed.

3. Create a restful environment. Create a room that's ideal for sleeping.

4. Limit daytime naps.

5. Include physical activity in your daily routine.

6. Manage worries.

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The exact cause of sleepwalking is unknown, but it seems to run in families. You're more likely to sleepwalk if other members of your close family have or had sleepwalking behaviours or night terrors. The following things can trigger sleepwalking or make it worse: not getting enough sleep.

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Nightmares can be triggered by many factors, including: Stress or anxiety. Sometimes the ordinary stresses of daily life, such as a problem at home or school, trigger nightmares. A major change, such as a move or the death of a loved one, can have the same effect.