Beginner's Guide to Sleep

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• Two forces run your sleep: a body clock that sets the timing and sleep pressure that builds the longer you stay awake.
• Keep the same wake-up time every day, weekends included, because a steady morning anchors the body clock better than any bedtime rule.
• Get daylight within the first hour after waking and dim the lights in the last half hour before bed, so your clock knows what time it is.
• If you have been lying awake for what feels like twenty minutes, get up and do something dull in low light until sleepiness returns.
• Loud snoring with gasps, sleepiness you cannot fight in the day, or poor sleep lasting weeks are reasons to see a doctor, not to try harder.

In deze bit

1. What actually happens when you sleep

   Sleep looks like switching off, but the brain is busy all night. After you drift off, you pass through light sleep into deep sleep, when breathing slows and the body does much of its repair work.

2. Why sleep deserves a place in your day

   Sleep is not time stolen from a productive life; it is part of what makes the rest of the day work. While you sleep, the brain sorts and stores memories, the body repairs tissue, and the systems that manage mood, appetite and infection are reset.

3. The handful of words that explain your nights

   A few terms make every other conversation about sleep easier. Your circadian rhythm is the body clock, a roughly 24-hour cycle that decides when you feel alert and when you feel drowsy.

4. Three first moves that change most nights

   Beginners usually start with the bedtime, but the morning is the stronger lever. The first move is a fixed wake-up time, the same seven days a week, give or take half an hour.

5. Classic mistakes and what to do instead

   The most natural reactions to a bad night are often the ones that keep it going. Lying in bed trying harder teaches the brain that bed is a place for frustration.

6. When sleep problems need a doctor

   Most poor sleep improves with steadier timing, but some signs point to a medical cause that no routine will fix. Loud snoring with pauses in breathing, gasping or choking at night can signal sleep apnoea, which needs a doctor's assessment.