Objective: Laughter yoga/therapy is a non-humorous laughter inducing exercise consisting of breathing techniques and positively changes the mood. This systematic review was conducted to determine the effects of randomized controlled trials (RCTs) regarding laughter therapy on physical and mental health in individuals with different health conditions.
Methods: The PICOS format was used in this systematic review. The PRISMA checklist was used for data summarization and result reporting. In this systematic review assessed randomized controlled trials (RCTs) published in Turkish and English in the EBSCO, Web of Science, Wiley Online Library, PubMed, National Thesis Center, National Academic Network and Ulakbim data sources from January 2005 to November 2020.
Results: This study was completed with 16 RCTs meeting the research criteria. At the end of the study, the laughter therapy was found to be effective in reducing pain, depression, stress and anxiety in individuals and increasing sleep quality. There was limited evidence for the effect of therapy on somatization, blood glucose, blood pressure, endorphin and cortisol levels.
Conclusion: It was determined that laughter therapy can be considered as an appropriate approach for public health nurses to improve the physical and mental health of individuals and its effectiveness can be tested. Laughter therapy can be recommended by healthcare professionals working in hospitals or community centers as a non-pharmacological, simple, inexpensive and therapeutic method that they can benefit from in care.