Beauty sleep is no myth. If you’re concerned about your looks you’d be wise to consider the countless ways that sleep contributes to your physical appearance.
At night, human growth hormone (HGH) is released. This plays a vital role in stimulating collagen, which as every beauty buff knows, is key to healthy looking skin. It’s simple, less sleep, less collagen.
The last few decades have provided invaluable research about sleep’s role in our memories. In fact there’s evidence to suggest that one of the possible functions of sleep is to facilitate memory retention.
Researchers believe that sleep is vital in order for an event to be consolidated into a long term memory. Without sleep, your brain has a much hard time absorbing and recalling information.
Although napping can help, it’s thought that memory consolidation mostly takes place in deep, or slow-wave sleep (SWS). Experiments have shown that artificially boosting SWS improves memory consolidation, as does a period of SWS before learning.
In short, if you don’t want to forget. Sleep….deep.
Less sleep means that some of these tasks remain incomplete, putting undo strain on your grey matter. Research has even found that sleep deprivation can cause your brain volume to actually shrink in size.
The evidence is clear. If you want to look after your brain, make sure you get plenty of sleep.
4) You lose your keys, (and your attention span)
If you find yourself scouring the house for your keys every time you try to leave, you might want to reconsider the amount of sleep you’re getting.
Lack of sleep goes hand in hand with clumsiness. Both our mental and physical faculties are adversely affected. Studies have shown that footballer’s skills are noticeably diminished after a bout of sleep deprivation.
This is the reason for both – the lack of speed, and the increase in errors caused by a sleepy, malfunctioning brain. As we get more tired, our neurons start to malfunction, causing behavioural and cognitive changes which gradually get worse and worse.
Lack of sleep also interferes with the speed and efficiency of your learned responses and reaction times. Many times, these few extra seconds are crucial in avoiding a Mr Bean-like mishap ,or perhaps some more serious.
6) You pile on the pounds
Our body clocks, or circadian rhythms, don’t just dictate when we’re asleep and awake. They also determine many other vital physiological processes including body temperature, hormone production, and when we should be eating.
Hence sleep and appetite are intimately linked. Eat at the wrong time of day and your sleep will suffer. Conversely, if you’re sleep deprived, your hunger and appetite is thrown completely out of whack.
Studies have found that night shift workers, for example, who sleep during the day are more likely to become obese because of the disruption to their metabolism caused by shifting sleep patterns.
All of which adds up to the fact that if you want to maintain a healthy weight, sleep, is just as important as diet and exercise.
7) Your ruin your immune system
While we sleep in bed at night our bodies may seem passive, but inside there’s a hive of activity going on. Among other things it’s when our cells are repaired, neural pathways are strengthened, protective antibodies are created, and hormonal balance is established.
Since a sleep deprived body also does not get to complete it’s repairs, our overall immunity become compromised. The body actually performs like that of a much older person; suggesting that sleep is essential to combat the effects of ageing.
8) You have more accidents
Sleepy loss causes lapses in attention and memory that sometimes have disastrous consequences. Sleep deprivation and drowsy driving is responsible for 100s of thousands of road accidents every year.
Impaired judgement, lowered attention spans when sleep deprived can cause us to miss important information from our surroundings, often leading to ‘microsleeps‘ – that can provide disastrous when driving or operating machinery.
9) You’re moody as hell
We all know what it’s like to get out of the wrong side of bed. Grumpiness, irritability, short temper. But the emotional effects of sleep deprivation can be far worse.
Even short term sleep loss can have negative consequences. Researchers from the University of Pennsylvania found that subjects who were restricted to 4.5 hours sleep per night became increasingly stressed, angry, sad, and mentally exhausted. When the participants resumed normal sleep however, their mood showed a rapid improvement.
So take heart if you find yourself snappy, irrational, down, or just plain unpleasant. You just might need to get a few more hours of sleep.
10) You lose your libido
Poor sleep makes you feel less inclined to have sex. Although it’s the case for both sexes, it is particularly true for men.
Sleep deprivation has been linked to reduced testosterone levels with one study finding that otherwise healthy young men experienced a 15% dip in testosterone after just a week of limited sleep.
This, along with all the other factors, means that if you’re chronically sleep deprived, the last thing that will be on your mind is sex.
11) Finally….you might die
As if all the above weren’t scary enough, consider that long term sleep deprivation can actually increase the risk of death.
Apart from the (potentially lethal) mistakes we might make when sleepy, consistent sleep deprivation (sleeping for less than 7 hours a night) is linked to increased risk for heart disease and stroke, and increase in blood pressure and obesity – all conditions that carry the risk of bodily harm and death.
Despite our advanced scientific knowledge, we still don’t fully understand why sleep deprivation is so dangerous. But as a stark warning, consider Allan Rechtschaffen’s series of groundbreaking sleep experiments in the 1980’s. He subjected rats to continual sleep deprivation, and, after 32 days, every single one was dead.
Scientists still don’t agree on the mechanisms that can cause sleep loss to become fatal, and we’ll probably never know because we can’t conduct the same experiments on humans. Thankfully, it’s easy to prevent such dire consequences. One word. Sleep.
Jeff is the founder and editor-in-chief at Sleep Junkies . A passionate sleep advocate, he started the site in 2012, reaching millions of readers across the globe. Jeff also runs the product curation platform SleepGadgets.io . He is often asked to speak at about current trends in consumer sleep technology at various events.