06/05/2016 4:35 PM AEST | Updated 28/09/2016 10:00 PM AEST

Boarding A Flight? Your Body Is About To Experience Some Major Changes

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Young backpacker couple at airport

You've downloaded your podcasts, grabbed some overpriced lollies and are now settling into a well-deserved glass of sparkling before boarding your long-haul flight.

It's finally holiday time! And you couldn't be more pumped.

Though, before you get overly carried away with the free booze and pint-sized Pringles, know that upon taking off your body will go through some pretty major changes, so be kind.

Flying just three hours? Your body will shed up to 1.5 litres. Yep, this explains why incidents from "Bridesmaids" happen in real-life. True story.

What's more your chance of catching a cold is 100 times higher while up in the air. This is because half of the cabin air is recirculated during a flight. Icky!

All of that pressure will also make you literally expand, especially in your lower legs.

But don't worry, it's not all bad. Soon you'll be in an exotic land far away (on the ground) where you can eat, drink and expand to your heart's content. Just don't say we didn't warn you.

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