Sleep is no longer just a period of rest with which a person ends his day. Rather, it is now viewed as one of the most important pillars of physical and mental health, along with food and physical activity.
During sleeping hours, the body does not stop working, but rather begins a complex series of vital processes that affect the brain, heart, immunity, metabolism, and even mental health.
Recent research indicates that sleep disturbances or chronic sleep deprivation not only reflect a feeling of fatigue during the day, but may also be linked to an increased risk of developing serious diseases such as Alzheimer’s, diabetes, heart disease, and depression.
How is staying up late linked to Alzheimer’s?
Beta-amyloid is a protein that the brain produces naturally, but the problem begins when the body fails to get rid of it efficiently, so it accumulates between nerve cells, forming plaques that are one of the most prominent signs associated with Alzheimer’s disease.
Researchers point out that deep sleep helps the brain get rid of this protein, while intermittent sleep or chronic staying up late reduces the efficiency of this process, allowing harmful proteins to gradually accumulate.
Studies have shown that severe sleep deprivation for even a single night may temporarily raise beta-amyloid levels within the brain, but the greatest risk is associated with sleep disorders that persist for years, such as chronic insomnia or sleep apnea.
Scientists also believe that the type known as Aβ42 of the beta-amyloid protein is considered the most dangerous. Because it is more likely to accumulate within the brain, it may contribute to neurological inflammation and damage to cells responsible for memory.
Sleep and mental health
The impact of sleep is not limited to memory and the brain, but also extends to mental health and emotional regulation.
Good sleep gives the brain an opportunity to process daily stresses and emotions, while deprivation of it leads to increased anxiety, tension, and mood swings, and may raise the risk of depression in the long term.
Specialists point out that sleep disorders are often linked to psychological conditions, as insomnia may become both a cause and a consequence of mood disorders.
What happens to the heart during sleep?
During normal sleep, blood pressure and heart rate decrease, giving the heart and blood vessels a chance to rest and rebalance.
But insufficient or intermittent sleep may lead to high levels of stress and inflammation within the body, which is linked to an increased risk of high blood pressure, heart disease, and strokes.
Sleep apnea is also a dangerous sleep disorder that may directly affect heart health and oxygen levels in the body.
Sleep and diabetes: a hidden relationship
On the metabolic side, sleep plays an important role in regulating the body’s response to insulin and blood sugar levels.
Researchers confirm that deep sleep helps the body maintain hormonal balance and improve cell sensitivity to insulin, while lack of sleep is linked to an increased risk of developing type 2 diabetes, especially when it continues for long periods.
Lack of sleep also affects the hormones responsible for hunger and satiety, which increases appetite for foods rich in fats and sugars, and increases the chances of weight gain and obesity.
Immunity is also affected
The benefits of sleep do not stop at the brain and heart, as sleep plays an essential role in supporting the immune system.
During sleep, the body enhances the production of some immune substances necessary to resist infection and inflammation, while people who suffer from lack of sleep become more susceptible to disease due to a weak immune response.
Is long sleep always beneficial?
Despite the importance of sleep, health experts warn against excessive sleep on a continuous basis, as sleeping for long periods may be an indicator of underlying health or psychological problems, and may also be associated with inactivity and poor physical activity.
Specialists confirm that the matter is not only related to the number of hours, but also to the quality and regularity of sleep.
Health institutions recommend that adults usually get between 7 and 8 hours of sleep per day, maintaining regular bedtimes and reducing exposure to screens and stimulants before bed.