Sleep is a fundamental part of our daily lives that influences physical recovery, cognitive function, mental clarity and immune system strength. However, many people are unaware of the complex processes that occur when they rest.
Sleep is not a uniform state but rather a cycle consisting of different stages of sleep. Understanding these stages can help manage sleep-related disorders, improve sleep quality and boost productivity. Read on to understand the various stages of sleep.
Different stages of sleep
Sleep is divided into two main categories: Non-Rapid Eye Movement (NREM) and Rapid Eye Movement (REM) sleep. These two categories have five stages of sleep, including:
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Wake stage
In this stage, the body transitions through the wake stage between wakefulness and sleep. This phase includes relaxed wakefulness and drowsiness as the body slows down in response to sleep cues.
Muscle activity begins to slow and brain waves shift from alertness (beta waves) to relaxation (alpha waves).
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Stage N1
Stage N1 lasts only a few minutes as the body begins to relax. The heart rate slows, muscles relax and brain waves shift to a more rhythmic pattern. Although this stage is brief, it is essential for preparing the body for deeper sleep cycles.
People in this stage may experience sudden muscle jerks or the sensation of falling.
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Stage N2
Stage N2 is the longest sleep phase, constituting about 45% of the sleep cycle. During this stage, the body temperature drops, breathing and heart rate stabilise and brain activity slows.
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Stage N3
Also known as slow-wave sleep (SWS), this stage is crucial for physical recovery. The body repairs tissues, strengthens the immune system and releases essential growth hormones. Deep sleep also supports metabolic health.
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REM sleep
The REM stage is characterised by rapid eye movements, increased brain activity and vivid dreams. This stage is essential for emotional regulation, learning and memory consolidation.
Conclusion
Understanding the different stages of sleep helps you understand the importance of quality rest. Poor sleep can cause long-term health issues. If you are struggling with sleep issues, consider making lifestyle adjustments like maintaining a consistent bedtime, reducing screen time and ensuring a comfortable sleep environment.
Supporting these habits with a balanced diet, regular exercise and routine medical check-ups can further enhance overall well-being. Early detection plays a key role in long-term health and having the right individual health insurance can help cover medical costs and treatments.
Disclaimer: The information provided in this blog is for educational and informational purposes only. It is not intended as a substitute for professional advice, diagnosis, or treatment. Please consult your general physician or another certified medical professional for any questions regarding a medical condition. Relying on any information provided in this blog is solely at your own risk, and ICICI Lombard is not responsible for any effects or consequences resulting from the use of the information shared.