Experts know the first thing you should do in the morning.

If you’re anything like me, the first thing you do in the morning is probably stumble out of bed, bleary-eyed, and go in search of coffee. Lots of coffee.

By a Harvard psychologist has revealed that there’s one simple thing we should all be doing as soon as our eyes open in the morning that will help to make the day ahead as happy as possible.

According to Amy Cuddy, stretching in the morning can help improve our mood and emotions.

Cuddy is the author of Presence: Bringing Your Boldest Self to Your Biggest Challenges, and she has even delivered a popular TED talk on power posing.

Watch Amy's TED Talk here. Post continues after video...

According to Tech Insider, Cuddy argues that stretching is a power pose, which can boost confidence and therefore our mood.

"The people who wake up like this [in a V shape] are super happy, like annoyingly happy," she said.

But on the other end of the scale, sleeping curled up in a "foetal ball" can be harming your emotions.

"If you sleep in a foetal ball...we have some preliminary evidence that people who wake up like that wake up much more stressed out."

So stretching out wide (similar to the pose shown above) as soon as you wake can undo a negative sleeping position, and lead to a happier day.

It sounds a little crazy - but we are definitely willing to give it a go.

What's your sleeping position?