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September 04, 2023

The science of sleep: Why sleeping well is essential for your health

Sleep is so common and natural that we often forget how crucial it is to our health and well-being. But what actually happens when you sleep? And why is sleep so important for your body and mind? Let's delve deep into the fascinating science of sleep and find out why it is a key component of your health that should not be underestimated.

1. The phases of sleep: A journey through the night

While you sleep, you go through different sleep stages, each with their own unique characteristics and functions. Your sleep cycle can be broadly divided into two main categories: REM (Rapid Eye Movement) and Non-REM.

Non-REM sleep:

  • Phase 1: This is the phase between being awake and sleeping. It is quite short and only lasts a few minutes. Your eye movements slow and your muscles relax.
  • Phase 2: Your heartbeat and breathing slow down. Your body temperature drops slightly. This is the sleep state in which you spend most of your night.
  • Phase 3: This is deep sleep in which the body regenerates itself. During this phase, tissues regenerate, bones and muscles build, and the immune system is strengthened.

REM sleep:

  • About 90 minutes after you fall asleep, you enter the REM phase. This is the phase where most dreams occur. Your brain becomes more active and your eyes move back and forth quickly (hence the name).

2. Why sleep is important for the body 

It's not just the peace that sleep provides that's important. While you sleep, your body works hard to recover from the exertions of the day and prepare for the next.

  • Cell regeneration: During the deep sleep phase, your cells regenerate. This is crucial for growth, tissue and bone repair, and immune system strengthening.
  • Energy replenishment: While you sleep, your body replenishes its energy reserves so that you are ready to start the next day full of energy.
  • Hormone production: Sleep affects the production of many hormones, including growth hormone and insulin.

3. Sleep and the Brain: A Renewal of the Mind

The processes in our brain are just as important as the physical processes that take place during sleep. While you're resting in your bed and dreaming, your brain is anything but idle.

  • Memory consolidation: Sleep plays a crucial role in processing and storing information you absorb during the day. During REM sleep, the brain consolidates memories and reinforces learning processes. Without enough sleep, it could become more difficult to remember important information or learn new skills.

  • Emotional processing: During the REM phase of sleep, our brain also processes emotions and experiences from the day. This process helps regulate emotions and promote mental health.

  • Creativity and problem solving: Research has shown that after a good night's sleep, people are often better able to problem solve or find creative solutions. It's as if the brain "rethinks" while sleeping and creates new perspectives and connections.

4. The health risks of lack of sleep

The consequences of lack of sleep can be far-reaching, affecting both physical and mental health.

  • Cardiovascular diseases: Chronic lack of sleep can contribute to conditions such as high blood pressure and cardiovascular disease.
  • Weight gain: A lack of sleep can affect hormone levels and increase feelings of hunger, which can lead to overeating and weight gain.
  • Mental health problems: Sleep deprivation can lead to problems such as depression, anxiety and even psychosis.
  • Immunodeficiency: Your immune system works hard while you sleep to protect you from illness. Without enough sleep, your immune system can weaken, making you more susceptible to infections.

5. How to Promote Better Sleep? 

Getting a good night's sleep is not a given, but there are strategies and tools that can help you improve the quality of your sleep.

  • Routines: A consistent sleep pattern can work wonders. Try to go to bed at the same time every night and get up at the same time in the morning.
  • Sleep environment: Make sure your bedroom is quiet, dark and cool. A good bed and a high quality mattress, like the "KUQON Individual Mattress", can make the difference.
  • Avoid screens: The blue light from cell phones and computers can disrupt melatonin production, a hormone that promotes sleep. Try to avoid screens at least an hour before bed.


Sleep is not just a luxury but a necessity. Our bodies and brains depend on it to heal, grow and function optimally. By better understanding the science of sleep, we can take steps to ensure we get the rest we need every night.



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