A systematic review of 33 clinical trials suggests that laughter therapy significantly reduces anxiety and enhances life satisfaction in adults, with large effect sizes observed, especially in laughter yoga and social interaction-based therapies, indicating potential as a therapeutic tool.
Laughter therapy has been found to improve cardiovascular health and ease symptoms of heart disease, according to a study conducted in Brazil. Researchers discovered that watching comedy programs for three months resulted in a 10% increase in the heart's ability to pump oxygen and improved artery function. Additionally, inflammatory biomarkers were reduced, indicating a lower risk of heart attack or stroke. Laughter releases endorphins, which help maintain healthy blood pressure and reduce stress hormones. The study suggests that laughter therapy could potentially reduce reliance on medications and recommends engaging in activities that induce laughter at least twice a week.