“A new study suggests smiles—the more genuine, the better—help you bounce back from stress. . . . researchers at the University of Kansas found that the act of smiling has a positive effect on our happiness and physical health, helping the heart recover more quickly after stressful events. . . . “The neat thing about this is that smiling during the stressful period also has positive benefits for your heart health for several minutes after you’re smiling. . . . It’s good for emotional and social health and well-being, but this really is the first study among its kind to show that smiling is beneficial to you physically.”