So what exactly is sleep? Well the Oxford English Dictionary defines sleep as:
“a regularly recurring condition of body and mind in which the nervous system is inactive, the eyes closed, the postural muscles relaxed, and consciousness practically suspended”
So basically, it’s a state we enter where, the body shuts down and we slowly drift out of consciousness.
When you put it in terms like that, it seems like a very weird thing to happen. Imagine explaining this to an alien who had never heard of sleep before: “Well, every night we go to our own special places where we shut down and lose consciousness and then automatically get turned back on when it’s morning.”
Sleep is a very strange thing indeed, but do we need it? And what happens during sleep? Could future developments mean we don’t have to sleep as much, if at all?
Do we need sleep?
So do we need this sleep? Simple answer, yes. But different people need different amounts, and the way we sleep changes with age, but it’s not possible (yet) to break out of the cycle.
Newborns need the most sleep. In fact they spend the most of the day sleeping, up to 18 hours. The required number of hours gradually fades until we reach adulthood, where it stays at around 7 – 8 hours sleep per night. These numbers are only averages though. Some people can get by with much less, say 4 – 5 hours while some people need a little more. Essentially it’s down to genetics.
The amount of time you sleep actually means nothing. What really counts is the quality of sleep you receive. Even if you sleep a full 9 hours, if you don’t enter into good quality deep sleep during that time, you’ll feel like you’ve been awake all night. The quality of sleep thankfully isn’t governed by genetics, but the actions you take during the day which affect your sleep environment, body, mindset and the timing of your body clock. All these can be optimised with a bit of know how, and this website is here to help you do just that.
Sleep and animals
It’s not just humans that need sleep, (most) animals need it to. But the way they sleep can be completely different to the way we humans do it, although the general process is pretty much the same. I say most animals need sleep because some scientists believe that fish who live in coral or ones that need to keep swimming to breath or animals that live in dark caves, may actually be able to escape sleep all together.
Future possibilities
So if it may be possible for some animals to skip sleep, by examining these creatures could it one day be possible for humans to skip sleep also.
After all, if we could, insomnia would be a thing of the past. We sleep for a third of our life, what could humans achieve with this extra third of their lives? What more would have Einstein or Newton discovered with this extra time?
Scientists have actually discovered a gene that if correctly altered, can reduce the amount of time needed to sleep from 7 – 8 hours to around 6. That may not be much, but it’s a start, and the hours would soon build up. So who knows, maybe our future selves would laugh at this idea of “sleep”.
What happens during sleep?
But right now, and certainly for the time being, sleep is what everyone needs. But why do we need it? What actually happens when we sleep?
There are a number of theories which can help answer that question, but the full picture of why we need sleep is still actually not known.
Sleep as a research area was previously avoided by scientists. It was thought that sleep was just like shutting down a computer, nothing happens until it is turned back on, so analysing people in this state would be pointless.
However, it was found that the brain is in fact pretty active when we are asleep. Lots of things are happening. So now we know this, sleep has become a hot topic of research.
Its like thinking the sky is a ceiling, there’s nothing up there but the top of the earth, that’s pretty boring. Then finding out that there’s actually more than meets the eye, and that there’s actually a lot happening above our heads, many new worlds exist in space just waiting to be explored.
What we do know
So while we now know sleep is much more interesting than was first thought, there’s still a heck of a lot of catch up to do. There are a few things we do know about it.
Sleep helps the body heal itself. The healing of wounds is dramatically impacted without good quality sleep.
Along with the healing, sleep also keeps up your bodies defences. It’s been found that a lack of sleep decreases the number of white blood cells, the fighters against illnesses.
The growth hormone is also affected. Its main secretion is when you’re fast asleep.
The inactivity of sleep gives your brain a perfect opportunity to process all the information is gathered from the day, and it does just that. This helps explain why children need more sleep than adults, as they explore their new world and learn the ways of the land.
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So, at least for the time being, we all need sleep. Until we understand the ways of these magical fish, we may as well make the most of it, it’s a third of our life after all. By optimising the four foundations of sleep, environment, mind, body and timing, we can all get the lovely, refreshing sleep we need.
