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Don't believe us? Take a look at this short explanatory video:
You see, not only is sleeping for the right amount of time - as well as a load of other things - really good for your health, how you sleep is also important, because sleeping constantly on your side can contribute to 'sleep wrinkles'.
It stands to reason, really. The weight of your head when you sleep, combined with the force of gravity and pressure down on a surface, suggests that over time it's going to have some sort of effect.
But, you don't just have to take the word of the person in this TikTok video for it, because there is some science behind it, and we can bring you that right now.
A study entitled 'Sleep Wrinkles: Facial Aging and Facial Distortion During Sleep' was published in the Aesthetic Surgery Journal back in 2016, and it states: "Wrinkles are inevitable and while a few lines may be endearing, most of us would prefer to keep them in check.
"When we consider wrinkles we generally think of the lines of facial expression.
"While facial animation is responsible for the most significant wrinkle patterns, not all wrinkles of the face are due to muscle contraction."
"Sleep wrinkles develop in response to distortion created when the face is pressed against any sleep surface.
"Compression, shear, and stress forces result in facial distortion in side or stomach sleeping positions.
"In contrast, the only external forces acting on the face in the supine position [lying on the back] are gravitational."
As you get older, you're obviously more likely to get wrinkles as your skin doesn't react and - for want of a better word - bounce back like it used to.
That's a fact of life, but - as we all know from the adverts - you can slow down the process.
In this case, simply by sleeping on your back.
Don't put pressure on your face, and it won't wrinkle.
However, you are more likely to snore, which - if you share a bed with another person - could lead to another more swift-acting pressure on your face.
Of course, there is a surgical option, but there's also the option to just live with it and age gracefully.
The journal article continued: "Sleep wrinkle pattern will be additionally influenced by how much time is spent in various positions, how much force is applied to each area of the face, and surface area of contact.
"While we recommend back sleeping, it is extremely difficult to consciously change sleep patterns. Our initial sleep position is a choice, however we unconsciously change position throughout the night.
"The supine position may be ideal for facial aesthetics but can aggravate conditions including sleep apnoea, gastroesophageal reflux, and severe snoring."
So, if you want to stay wrinkle-free, sleep on your back, but if you want to avoid snoring and p***ing people off, just don't worry about it.
However you sleep, getting enough good quality sleep will stop you aging quickly anyway, so that's the most important thing.
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