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Turning your frown upside down has a myriad of benefits not only for the grinner, but for the people around her too. A study featured in Psychiatry Research found that if you smile, it encourages others to mimic your facial expression.
What’s more, research published in Psychological Science presented evidence that the simple act made people feel more relaxed in uncomfortable situations. Nervous about going on a run with that new club for the first time? Just put on a grin—others are sure to follow suit.