It's easy to feel a little down when you have to head back to work after a fun holiday break -- but there is something you can do to improve your mood... sit up straight!

Research backs up good posture for a good mood!

A study out of New Zealand found that participants who sat up straight had an increased heart rate which boosted endorphins, making them more alert -- and as a result, feel better about themselves.

The study found that participants who used good posture reduced fatigue and increased enthusiasm. They had more energy and a less negative mood and were less self-focused which helped ease their depression.

The study found that using good posture also worked for those who didn't suffer from depression.

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