“I don’t sleep enough on weekdays, but it’s fine as long as I sleep a lot on my days off.”
Many people probably think this way.
In reality, though, lost sleep can build up little by little like a loan, and this is called “sleep debt.”
Because sleep debt is hard to notice in yourself, it deserves extra attention.
What is sleep debt?
Sleep debt is a state in which small, day-to-day shortfalls in sleep accumulate and begin to affect body and mind.
For example, if someone who needs about 7 to 8 hours of sleep gets only 6 hours every night, they may not feel much difference on any single day, yet the missing sleep gradually piles up.
Even a shortfall of just 30 minutes to an hour a day is thought to cause fatigue to build up in the brain and body when it continues for days, weeks or months.
We know that during sleep, the body not only organizes memories, releases hormones and repairs itself, but the glymphatic system, which clears waste products from the brain, is also highly active.
For this reason, ongoing sleep deprivation is thought to leave the brain unable to fully maintain itself, which can make fatigue harder to shake.
Even if you think “a little less sleep won’t hurt,” it is not uncommon for sleep debt to build up without your realizing it.
Common effects of sleep debt
When sleep debt continues, it can lead to:
• Reduced focus
• Poorer judgment
• Weaker memory
• Fatigue that won’t go away
• Becoming irritable more easily
• More mistakes
and more.
Research from organizations such as the American Academy of Sleep Medicine has also reported that chronic sleep deprivation is linked not only to lower performance at work or school, but also to a higher risk of lifestyle-related diseases such as high blood pressure, diabetes and obesity.
Sleep is not just “time off”; it is time that is essential for restoring body and mind.
“Catch-up sleep” can’t fully make up for it
People often assume that sleeping in on days off will fix things, but in fact, chronically accumulated sleep debt has been shown not to be fully resolved by a single session of catch-up sleep.
Sleeping longer on days off may ease sleepiness and fatigue, but when the gap between weekday and weekend sleep becomes large, it can disrupt your body clock and cause “social jet lag.”
As a result, you may have trouble falling asleep on Sunday night, making Monday morning even harder, which can turn into a vicious cycle.
What matters is not catching up on sleep, but getting a consistent amount of sleep each day as much as possible and not shifting your wake-up and bedtimes too much.
Sometimes sleep alone isn’t enough to recover
Sleep is essential for restoring body and mind.
But people today process a great deal of information all day long through work, smartphones, social media and more.
Many people find that even when their bodies are resting, their brains keep thinking and keep sorting information.
That is why some people feel:
“I thought I slept well, but I’m still tired.”
“My head feels heavy from the moment I wake up.”
“I can’t stay focused.”
and so on.
Today, it is becoming more and more important not only to sleep, but also to consciously make time to let the brain relax.
What we value at La HEAD
At La HEAD, drawing on years of hands-on experience and knowledge of the body gained at an osteopathic clinic, we treat not only the head but also the neck, shoulders, back of the head and arms.
We are also particular about creating an environment where you can relax through all five senses, with a fully private room, soft lighting, soothing music and refined scents.
Because people today take in so much information and are always thinking, we want to offer time when not only the body but also the brain can truly relax.
Don’t let sleep become a “debt”
Sleep debt doesn’t grow large in a single day.
Small daily shortfalls add up and affect body and mind before you know it.
That is why:
• Go to bed at about the same time every day
• Keep a consistent wake-up time
• Spend less time on your smartphone before bed
• Get moderate exercise during the day
• Make time to relax body and mind
Building up small habits like these shapes how you will feel in the future.
Precisely because life is busy, why not treat “time to rest” as one of your important appointments, just like work and other plans?