What I learned from the book “Why We Sleep: Unlocking the Power of Sleep and Dreams” by Matthew Walker

“To sleep is the single most effective action one can take to restore the brain and body each day — so far it is Nature’s best effort to combat death.” This impactful statement, taken from Matthew Walker’s book “Why We Sleep: Unlocking the Power of Sleep and Dreams,” resonates deeply when considering the importance of sleep in our lives.

The modern environments in which we live are far from those in which our ancestors lay down to rest. Our busy lifestyles, constant exposure to artificial light, and other contemporary habits directly affect our ability to sleep properly.

One of the key pillars to understanding the importance of sleep is the circadian rhythm, an internal biological clock that regulates our patterns of wakefulness and sleep over approximately 24 hours. This natural cycle is influenced by exposure to light, with artificial light potentially disrupting this cycle and negatively affecting our sleep quality.

Moreover, sleep plays a crucial role in learning and memory consolidation. It is during sleep that our brains process and organize the information acquired throughout the day, transforming knowledge into wisdom.

We cannot ignore the impacts of sleep on our physical and mental health. A poorly slept night directly affects the functioning of the prefrontal cortex, responsible for high-level thinking and emotional control. Additionally, adequate sleep is closely linked to physical performance, influencing even our ability to exercise.

Identifying signs of insufficient sleep is crucial to ensure our health and well-being. Frequent distractions, difficulty concentrating, and even forgetfulness may indicate that we are not sleeping enough. It is important to establish healthy sleep practices, such as maintaining regular sleeping and waking times, avoiding exposure to light before sleep, and creating an environment conducive to rest.

In summary, sleep is not a luxury but a vital necessity. We need to respect our biological rhythms and prioritize the quality of our sleep to ensure a full and healthy life. So let us sleep enough, at least 7 hours every night without exception, preferably 8 hours, but not much more than 9 hours if your biology is close to the general population. After all, if sleep has persisted throughout evolution, it is because nature has gifted us with this precious resource for our own well-being.