Not being able to sleep at night is something everyone has experienced. Sometimes, we stay up late for seemingly trivial reasons.

From worries like "What will happen at work tomorrow?" to feeling heavy-hearted over family or relationship issues, we toss and turn.

I've also found myself staying up late on weekends after watching shows like "The Summer I Turned Pretty."

The problem arises when this happens not just for a day or two, but for a week, several weeks, or even months.

That's when doctors talk about 'sleep debt.'

Literally, it's the difference between the amount of sleep I need and the amount I actually get.

If I stay up late for a day or two, it's not a big deal, but if I consistently get less sleep, it accumulates like a debt in my body.

For example, if my body needs 8 hours of sleep a day but I only get 6 hours, I'm accumulating 2 hours of debt each day.

By Friday, it feels like I've missed a whole day of sleep.

I remember working until 2-3 AM for several days due to an escrow issue, and by the weekend, I felt dazed and was irritable over minor things.

That's the scary part of sleep debt.

Experts say that sleep debt goes beyond just feeling tired; it impacts our overall health.

Reaction times slow down, concentration weakens, and decision-making abilities become clouded.

Moreover, it can negatively affect insulin regulation, inflammatory responses, and cardiovascular health, leading to bigger problems.

Long-term, it increases the risk of diseases like diabetes, hypertension, heart disease, and depression.

There are even studies suggesting that poor sleep after age 40 can reduce life expectancy.

What's even scarier is that lack of sleep can change our appetite.

Normally, we stop eating when we're full, but when we're sleep-deprived, we tend to crave sweets and carbohydrates more.

Feeling tired, we might reach for sugary drinks, snacks, or bread. Ultimately, this leads to weight gain, decreased immunity, and a vicious cycle.

That's why doctors firmly state, "Sleep is not a luxury; it's the foundation of health."

Here's an important question: Can we just catch up on sleep over the weekend?

I used to believe that 'sleeping in' on weekends would solve the problem, but experts say that's a misconception.

Even if you sleep a lot on the weekend, you can't fully repay the sleep debt accumulated during the week.

In fact, sleeping in on weekends can disrupt your biological rhythm, making Mondays even harder.

This phenomenon is often referred to as "social jet lag."

So what should we do? There are no quick fixes.

The body cannot recover from sleep deprivation with just a day or two of extra sleep; you need to maintain a consistent sleep schedule.

Doctors recommend going to bed a little earlier than usual and continuing this for several days or weeks to reset your body clock.

A short nap is fine, but it should be strategic so it doesn't interfere with your nighttime sleep.

Ultimately, the key is 'rhythm.' You need to go to bed and wake up at the same time every day.

If you stay up late and sleep in on weekends, your sleep debt will only increase, so it's best to avoid that.

The bedroom environment is also important. If it's too hot or bright, you won't get deep sleep, so creating a cool, dark, and quiet environment is essential.

I've definitely noticed this since turning 40. I used to be able to push through a night without sleep, but now it takes me longer to recover after just one night of poor sleep.

If you ignore your body's signals, your health can deteriorate significantly.

I've come to realize that what I lose by cutting back on sleep is far greater than what I gain.

In the end, sleep is an 'investment.' For both my present self and my future self, I need to ensure I get 7-8 hours of sleep every day.

Money and time can be regained, but health cannot.