4 reasons why we feel tired after waking up

Why do we feel tired after sleep

1. Accumulation of adenosine in the brain

We spend the last few hours before waking up in REM sleep. This phase is characterized by Sleep Basics / Cleveland Clinic with increased brain activity. The most noticeable sign is the rapid movement of the eyeballs. REM and slow sleep cycles are repeated 4–5 times per night. It is during REM sleep that we see vivid dreams.

During this phase, the brain consumes an impressive amount of adenosine triphosphate (ATP). It is a source and carrier of energy in cells. Adenosine suppresses T. E. Bjorness, R. W. Greene. Adenosine and sleep / Current Neuropharmacology vigor and alertness and stimulates sleep, which is why we wake up sleepy.

2. Shared sleep or lack of it

The state after waking up is also influenced by whether you slept with someone nearby or not. For example, women who share a bed with a man report decreased sleep quality. But if sex is preceded by sleep, the woman's mood improves, she tolerates mediocre sleep and morning fatigue.

The presence of a woman in bed does not affect a man's sleep. Conversely, men report decreased sleep quality when they spend the night alone.

3. Late bedtime

Owls, preferring to sleep and wake up later, are vigorous day and evening. But for those who like to go to bed in the middle of the night, the quality of sleep suffers and insomnia is more common.

Night wakes are influenced by D. Kuperczkó, G. Perlaki, B. Faludi, et al. Late bedtime is associated with decreased hippocampal volume in young healthy subjects / Sleep and Biological Rhythms on the hippocampus, which is responsible for emotions, memory and attention, and may even contribute to a decrease in its volume, which leads to decreased learning and memory loss, and may also be an early sign of Alzheimer's disease.

4. Lack of sugar

What we eat before bed also affects how we feel. Recent studies have shown that eating sweets before bed can improve the condition in the morning. An increase in blood sugar levels affects the activity of the neurons responsible for sleep. For the same reasons, after a plentiful dinner, it tends to fall asleep.

Why getting enough sleep is important

Scientists still don't know why we sleep. But they know exactly what we need. How much sleep do I need? / U. S. Centers for Disease Control and Prevention (CDC) at least 7 hours of sleep every day. Lack of sleep leads to irritation and activates bad memories and negative emotions. Emotional instability is a consequence of the inability of the front lobes of the brain to control the limbic system.

Sleep disturbance also affects memory, and severe insomnia can lead to various illnesses and mental disorders at the Insomnia / Mayo Clinic. In sleep, according to scientists, the brain gets rid of harmful protein, which accumulates, possibly contributing to the development of senile dementia. If you haven't gotten enough sleep, quit your business right now and take a nap!