International Journal of Innovative Research in Health Science

Background: Menstrual irregularities are common among adolescent girls, affecting quality of life and academic performance. Non-pharmacological approaches like yoga have shown potential in promoting menstrual health. Aim: The study aimed to assess the effectiveness of an instructional module on butterfly pose exercise among adolescent girls with menstrual irregularities in a selected college in Chennai. Methodology: A quantitative pre-experimental one-group pre-test and post-test design was used. The study involved 30 adolescent girls aged 18–20 years from Vijaya College of Nursing, Chennai. Data were collected using demographic variables, a semi-structured questionnaire on menstrual irregularities, and an instructional module on butterfly pose. Knowledge levels were assessed before and after the intervention. Statistical analysis was performed using descriptive and inferential methods. Results: In the pre-test, 3.33% of participants had excellent knowledge, 53.33% had good knowledge, and 43.33% required improvement. After the intervention, 53.33% achieved excellent knowledge and 46.67% good knowledge. The mean knowledge score increased from 9.63 (SD = 3.39) to 15.47 (SD = 1.85), with a mean difference of 5.86. The t-value of 12.68 was statistically significant (p < 0.05). No significant association was found between demographic variables and knowledge levels. Conclusion: The instructional module on butterfly pose exercise significantly improved knowledge among adolescent girls with menstrual irregularities. The intervention proved to be a simple, effective, and non-invasive strategy to promote menstrual health.