The idea of deep sleep
sleep is the cornerstone of our health and well-being, no less important than food and water. the brain performs a range of vital functions during sleep.
these functions include cellular regeneration and physical repair. during deep sleep, the body releases growth hormone, which helps repair tissues, build muscle, and strengthen the immune system to fight diseases and infections.
during sleep, memory is enhanced, information is processed and consolidated, and accumulated toxins are eliminated. these processes positively affect attention, learning ability, and decision-making.
sleep also helps regulate mood and psychological state.
lack of sleep causes stress, anxiety, and irritability. good sleep reduces the risk of developing psychological disorders and depression.
sleep is essential for cardiovascular health, as it helps regulate blood pressure and provides the heart muscle and blood vessels with a crucial period of rest, thus helping prevent chronic diseases.
sleep also helps control weight and metabolism. lack of sleep often increases appetite and raises the risk of obesity and diabetes.
it was once believed that going to bed at the same time every night helped people fall asleep easily and quickly. however, recent research has shown that this is not entirely accurate, especially if it is not accompanied by waking up at the same time every morning.
science has shown that the time you wake up, rather than the time you go to bed, is more important in determining the quality of your sleep that night.
going to bed at a specific time each night is a good habit, but it is not enough on its own, even when combined with an ideal sleeping environment - dark, cool, and quiet - and avoiding screens such as television.
despite this, some people continue to experience insomnia and sleep disturbances due to inconsistent wake-up times.
the mechanism behind waking up at a specific time begins the moment you get out of bed, as the body starts building up “sleep pressure,” which reflects the body’s biological need for sleep. this results from the accumulation of a chemical called adenosine, which the brain eliminates during sleep. if you wake up late because of a flexible morning schedule, you will have less sleep pressure by bedtime, making you feel less sleepy.
therefore, it is important to get out of bed at the same time every morning, even after a noisy, bad, or late night, or when you have had poor sleep.
some may find this rule illogical, but it is actually the most important rule and is worth trying for those suffering from insomnia. it is crucial not to go to bed unless you are genuinely sleepy. sleep is about health, not just rest.
the above is based on a 2024 study involving more than 72,000 middle-aged and older adults. the study showed that people with the most irregular sleep schedules were more likely to suffer heart attacks, strokes, and other heart problems, even if they slept for more than seven hours a night.
in another similar study, researchers found that people whose sleep and wake times fell within a one-hour window were less likely to die during the study period than those whose sleep and wake times varied within a three-hour window or more.
set a consistent sleep schedule starting today, and you will soon see the results. the mistake you make in the morning can ruin your sleep at night.
