The Effect of Laughter Yoga on Premenstrual Syndrome Symptoms and Quality of Life in Young Women

Inclusion Criteria: * Experiencing premenstrual symptoms (PMS score of 110 or higher), * Are between the ages of 18-25, * Have regular menstrual periods, * Can read and understand Turkish, Exclusion Criteria: * Students who completed the pretest data collection forms incompletely, * Students who were taking medication due to a chronic illness, * Students who were using hormonal contraceptive methods, * Students who had any health problems that could create a communication barrier, * Students who were receiving medication for insomnia (such as SSRIs and SNRIs), * Students who were receiving treatment for PMS, * Students who were pregnant or lactating in the last 12 months, * Students who exercised regularly (affecting homogeneity between groups and intervention effectiveness), * Students who had a diagnosed psychiatric illness (depression, panic attacks, schizophrenia, etc.), * Students who had a condition that prevented them from practicing laughter yoga (abdominal surgery within the last three months, uncontrolled hypertension, glaucoma, hernia, epilepsy).