The Science of Sleep: Why Getting Enough Sleep is Important for Brain Health

Zepp Aura
3 min readAug 25, 2023

As we age, our brains go through many changes, and one of the most important things we can do to protect our brain health is to get enough sleep. During sleep, the brain goes through important processes like memory consolidation and waste removal, which help the brain function properly. In this blog post, we’ll explore the science behind why getting enough sleep is important for brain health.

One of the most important functions of sleep is memory consolidation. The idea that sleep plays a crucial role in memory consolidation is supported by a wealth of scientific evidence from various fields of research, however the exact mechanisms behind it are not completely understood. One prominent theory is the “synaptic homeostasis hypothesis” or “synaptic downscaling,” which describes the relationship between wakefullness and sleep. During sleep, the brain processes and consolidates memories, making them easier to recall later. This is why getting a good night’s sleep before an important exam or presentation is so important-it helps to ensure that the information is stored properly in the brain.

Sleep also plays a critical role in the removal of waste products from the brain. One of the waste products that accumulates in the brain is beta-amyloid, which is associated with Alzheimer’s disease. Studies have shown that during sleep, the brain clears out toxic waste products, including beta-amyloid. This suggests that getting enough sleep may be important for preventing or delaying the onset of Alzheimer’s disease.

In addition to memory consolidation and waste removal, sleep also helps to maintain brain function. Poor sleep quality has been linked to reduced brain volume in several areas of the brain, including the prefrontal cortex, which is involved in decision-making and executive function. Sleep deprivation can also lead to increased levels of beta-amyloid in the brain, which can interfere with memory and cognitive function.

So how much sleep do we need to maintain brain health? Experts recommend that adults aim for 7–9 hours of sleep per night for optimal health. However, many adults struggle to get enough sleep due to busy schedules, stress, and other factors. If you’re having trouble getting enough sleep, there are several things you can do to improve your sleep habits, such as:

  • Establishing a regular sleep schedule and sticking to it, even on weekends
  • Creating a relaxing sleep environment by keeping the bedroom cool, dark, and quiet
  • Avoiding caffeine, alcohol, and nicotine before bedtime
  • Engaging in relaxing activities before bedtime, such as reading or taking a warm bath
  • Using your smartwatch to track your sleep patterns and identify areas for improvement. Many smartwatches also come with bedtime reminders and guided breathing exercises, which can help you establish a healthy sleep routine.In addition, if you’re using your smartwatch as an alarm clock, make sure to set it to a consistent time each day to establish a regular sleep schedule.

In conclusion, getting enough sleep is crucial for maintaining brain health and function. By understanding the science behind sleep, we can make better choices to protect our brain health as we age. If you’re having trouble sleeping, talk to your doctor or a sleep specialist for personalized recommendations.



Zepp Aura

Zepp Aura, Zepp Health’s rest and mindfulness solutions service, helps users sleep and rest better with AI-powered personalized sleep melodies.