Laughter as a Mental Workout and Lifelong Health Booster

The old saying “laughter is the best medicine” holds more truth than we ever realized. According to Dr. Jacqueline Harding, an early childhood expert at Middlesex University in London, laughter is a vital catalyst for healthy brain development in children. In her book The Brain That Loves to Laugh, she explains that laughter activates broad brain networks—including motor regions and the prefrontal cortex—long before children learn to speak.

By helping the brain resolve conflicting ideas, laughter boosts creativity and engages working memory, functioning as a true “mental workout.” At a molecular level, it decreases stress hormones like cortisol and epinephrine while increasing happiness chemicals such as dopamine, serotonin, and endorphins. Laughter also raises oxytocin levels, deepening emotional bonds between parents and children.

Prolonged stress does the opposite: it impairs learning, suppresses immune function, and alters the developing limbic system. Fortunately, spontaneous, joyful play acts as an antidote to stress. The American Academy of Pediatrics notes that such interactions help children develop emotional regulation, feelings of safety, and social-cognitive skills. Dr. Harding advocates integrating humor into classrooms to reduce cognitive load and improve learning retention.

Beyond childhood, laughter continues to protect our health throughout life. Chronic stress and persistent low mood contribute to serious conditions such as hypertension, heart disease, weakened immunity, depression, and digestive disorders. Regular laughter helps counter these effects by lowering blood pressure, improving blood flow, and strengthening the immune system. For example, people who laugh often are less likely to catch colds and may recover faster from illness.

Therefore, let us actively create more joyful and humorous environments—at home, in schools, and at workplaces. Laugh often with children, friends, and colleagues. Not only does this support healthy development in young minds, but it also helps us, as adults, become more positive, motivated, and purpose-driven. A good laugh strengthens our bodies, lifts our spirits, and proves that happiness is not a luxury—it is a foundation for a healthier, more fulfilling life for all ages.