Eligibility Criteria:
Inclusion Criteria:
* Last menstrual pain is 5 points or more out of 10 on the Visual Pain Scale (moderate/severe/unbearable pain),
* Being 18 years or older,
* Reading and writing Turkish,
* Receiving education at undergraduate level,
* Being a first year student,
* Being nulliparous (never giving birth) and never having had a pregnancy,
* Having a regular menstrual cycle (every 21-35 days, lasting 3-8 days and without complaints of intermittent bleeding) for the last 6 months,
* Being inactive or minimally active according to the International Physical Activity Survey,
* Being diagnosed with primary dysmenorrhea by the physician,
* Agreeing to participate in the study.
Exclusion Criteria:
* Receiving education at the health vocational high school level,
* Last menstrual pain is 4 points or less out of 10 on the Visual Pain Scale,
* Having any gynecological diagnosis (endometriosis, ovarian cyst, myoma, polyp, etc.),
* Having undergone a gynecological operation (hysterectomy, myomectomy, etc.),
* Being on hormonal drug therapy,
* Having an orthopedic disability (congenital limb deficiencies, congenital hip dislocation, scoliosis, meningomyolocele, cerebral palsy, etc.), visual disability (vision loss, peripheral retinopathy, hemianopia, night blindness, etc.) and hearing disability that would prevent physical activity,
* Having acute or severe pain that increases with movement,
* Having a known systemic and chronic disease (diabetes, heart disease, vascular diseases, circulatory disorders, varicose veins, blood diseases, etc.),
* Having any psychiatric diagnosis (depression, anxiety disorder, etc.)
* Not agreeing to participate in the study.