Experts discuss the psychological and physiological impacts of smiling on mood and stress

Individual health routines, workplace policies, and school environments intersect with how people manage stress and express emotion, with studies showing that smiling can alter physiological markers like heart rate and cortisol levels.

• •Research known as the 'facial feedback hypothesis' suggests that physical facial expressions like smiling can influence human emotions.
• •Studies indicate that people who smile during stressful tasks generally demonstrate lower heart rates during recovery compared to those maintaining neutral expressions.
• •Smiling can affect levels of cortisol, a hormone the body releases to help regulate stress and mood.
• •Smiling can impact brain chemicals associated with positive feelings, including endorphins, dopamine, and serotonin.
• •Perceptions of smiles vary across cultures; American culture places high value on feeling positive, while East Asian cultures often emphasize emotional balance.
• •Studies in Taiwan and other East Asian contexts found that big, excited smiles may be characterized as 'emotionally unstable' or 'unreliable' unless situationally appropriate.
• •Thailand features nearly 30 Thai words for 'smile', where smiling is utilized to show respect, good manners, and calmness.
• •The Orange County Academy of Sciences and Arts incorporates smiling into its school philosophy to foster a supportive classroom culture.
• •Retailer Target previously faced social media criticism for instituting a policy requiring workers to smile and make eye contact with customers within specific distances.
• •Experts note that mandated smiling in the workplace can deprive individuals of emotional autonomy and lead to negative psychological effects when it feels inauthentic.