Less Sleep is dangerous

Less Sleep is dangerous

It has been associated with higher blood pressure, body mass index, and increased calcification of the coronary artery.

  • In lab experiments, people who slept only five hours a night for one week became less sensitive to insulin, which makes it harder to maintain blood sugar levels.
  • In an overnight sleep study of 1,024 individuals, poor sleep was associated with the misregulation of the hunger hormones leptin and ghrelin.
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Health

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Tick Tock
  • Every single cell of the body has clock genes, bits of DNA that flip on and off throughout the day.
  • Like the body as a whole, the cell's metabolism is scheduled for efficiency. Clock genes regulate the expression of between 5 and 20 percent of all the other genes in the cell.
Your Body is a Clock

Around 30 to 50 percent of people sleep between the hours of 11 pm and 7 am. Another 40 percents are either slightly morning people or slightly evening people.

To understand why some people are early birds while others are night owls, we have to take into consideration the body's circadian system.

Being a morning (or evening) person is inborn, genetic, and very hard to change.

The body is an orchestra of organs, each providing an essential function. In this metaphor, the circadian rhythm is the conductor. The conductor makes every neurotransmitter, every hormone, and every chemical in the body cycle with the daily rhythm.

This makes us our sleep habits unique and tailored.

When our personal clock is out of sync with the one of our society, our health suffers. 

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Jet lag

Jet Lag is a debility similar to a hangover. Jet Lag derives from the simple fact that jets travel so fast they leave your body rhythms behind.

Our biological clocks are synchronized to a 24-hour period. Our internal clocks drive our circadian rhythms, which anticipate dawn and dusk, and control everything from blood pressure to how hungry we are. When we fly to a different time zone, (or work night shifts), our internal clocks go out of sync.

The science of jet lag... and how best to beat it

bbc.com

We don't know how sleep evolved
  • Research has linked sleep with memory processing, emotional stability and even cleansing.
  • Most animals have their own circadian rhythm, or body clock. Even the cells in the body have a rhythm, so it's vital for organisms to have a way to sync these.

Perhaps sleep arose to group the body's processes, ensuring that specific processes don't conflict with one another.

The mysteries of sleep: everything we don't know about why we snooze

sciencefocus.com

Irregular sleep schedules and broken sleep-wake times are not just an occasional traveling phenomenon, but a wider problem due to our social lives conflicting with our sleep patterns.

Why You Should Fix Your Inconsistent Sleep Schedule - Facts So Romantic - Nautilus

nautil.us

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