“Just a few more minutes on my phone…” — with those words, countless people stay up until two in the morning. Then the day begins with heavy eyes, an irritable mood and wandering attention. We often treat sleep as a luxury we can sacrifice, yet in the eyes of science, sleep is as fundamental a need as food and water. Let’s find out what actually happens the moment you fall asleep.
Why Are Seven to Nine Hours Necessary?
Medical experts recommend seven to nine hours of sleep a night for adults. Sleep passes through different stages — light sleep, deep sleep, and dream sleep (REM). Each stage has its own job: in deep sleep, the body repairs itself; in dream sleep, the brain organises the day’s information. One full cycle lasts about 90 minutes and repeats several times through the night.
Memory and Repair During Sleep
Whatever you learn during the day, your sleeping brain transfers at night from short-term memory into long-term memory. That is exactly why students are advised to get a full night’s sleep before an exam. Meanwhile, in deep sleep the body releases growth hormone, which repairs muscles and tissues, and the immune system grows stronger. People who consistently sleep too little also fall prey to colds and flu more often.
The Harms of Sleep Deprivation
Even one bad night affects your attention and decision-making; long-term deprivation can have serious consequences — low mood, stress, weight gain (because the hunger hormones get disrupted), high blood pressure and increased risk of diabetes. A sleep-deprived driver can be as dangerous on the road as a distracted one; accidents caused by fatigue claim thousands of lives every year.
💡 Did you know?
An average person spends about 26 years of their life asleep! And the world record for staying awake is more than 11 days — but experts consider it extremely dangerous and strongly discourage anyone from attempting it.
The Mobile Phone: Sleep’s Silent Enemy
Scrolling your phone before bed is one of the biggest causes of poor sleep. The blue light from the screen sends a “daytime” signal to the brain and suppresses melatonin, the hormone that brings sleep. On top of that, social media news and videos keep the mind awake even longer. The result: lying in bed waiting for sleep, and the same exhaustion in the morning.
Practical Ways to Sleep Better
- Go to bed and wake up at the same time every day — even on weekends.
- Say goodbye to your phone and TV an hour before bed; read a book instead.
- Keep your room dark, quiet and relatively cool.
- Avoid tea and coffee after the evening; caffeine’s effect lasts for hours.
- Exercise lightly during the day, but avoid intense workouts right before bed.
- Eat a light dinner, and eat it on time.
Remember, sleep is not a waste of time — it is your body’s daily servicing. Try putting the phone away a little earlier tonight; your body will thank you in the morning!