A complete sleep cycle typically takes 90 to 110 minutes. This cycle includes all four stages of sleep: N1, N2, N3, and REM.
The first sleep cycle is usually shorter, lasting around 70 to 100 minutes, while later cycles tend to be longer, lasting between 90 and 120 minutes.
Here's a breakdown of what happens during a sleep cycle:
- N1 (Stage 1): This is the lightest stage of sleep, and you can easily be awakened.
- N2 (Stage 2): This is the stage where you become more deeply asleep and your body temperature and heart rate decrease.
- N3 (Stage 3): This is the deepest stage of sleep, often referred to as slow-wave sleep. It's during this stage that your body repairs itself and your muscles relax.
- REM (Rapid Eye Movement): This is the stage of sleep where most dreaming occurs. Your brain activity is similar to when you're awake, and your eyes move rapidly behind your eyelids.
Note: While a sleep cycle typically lasts around 90-110 minutes, the actual duration can vary depending on individual factors, such as age, health, and sleep habits.
