Do you know that laughing is very good for both your mind and body? When you laugh you move more and more; elongating and constricting muscles in your face and stomach.
Your heart rate boosts and you breathe quicker, too. This sends additional oxygen to tissues, like your muscles.
Laughter and still smiling both are shown to have short-term benefits like diminishing your stress levels and increasing the endorphins unconfined by your brain, and long-term benefits like improving your protected system as well as your mood.