Researchers at the University of Kansas reached that conclusion after a series of experiments on 170 participants. Individuals were asked to hold chopsticks between their teeth in different positions—each designed to force the mouth into either a smile or a neutral expression—before undergoing frustrating or physically painful experiences. In both instances, the heart rates of smiling participants recovered more quickly immediately following the experience than those who didn’t bear a grin. Bigger, more genuine smiles yielded even better results. This stress-busting benefit likely exists because of a relationship between key facial muscles, activated when we smile, and the body’s cardiovascular system, says lead study author Tara Kraft, MA, a graduate student in clinical psychology at the University of Kansas. “Some of these muscles in the cheek can only be activated with a big, wide smile,” she says. “Those seem to be the muscles responsible for this response.” Applying the study’s findings to your daily life is simple, Kraft says: “Remind yourself that smiling is literally good for your heart and good for your health,” she says. “The benefits go beyond just getting through a bad day.” (For more proof that a smile can do you good, check out our 3 Reasons To Fake a Smile.) Of course, a grin doesn’t always come naturally—especially when you’re freaking out over a deadline or pushing yourself through a grueling workout. Making a point to force a smile can be enough, Kraft suggests, or you can try the trick she uses herself: Stick a pen between your teeth horizontally, which “forces the right muscles to activate,” she says. Yes, your co-workers might gawk…but your body will thank you. More from Prevention: 2 Minutes To A Happier You Follow her on Twitter: @katiedrumm Send news tips and positive vibes to: Katie.Drummond@rodale.com
