Effect of yoga on serum homocysteine and nitric oxide levels in adolescent women with and without dysmenorrhea

Background: The purpose of the present study is to explore the effect of yoga on the serum levels of homocysteine and nitric oxide (NO) in a cohort of women with primary dysmenorrhea and normal healthy controls. Methods: A prospective controlled trial was conducted in 35 women with primary dysmenorrhea and 35 healthy controls in a community-based study. Short-form Menstrual Distress Questionnaires (MDQs) were administered to assess the menstrual symptoms. All participants were provided yoga intervention, twice a week at 30 minutes/session, consecutively for 8 weeks. Blood samples were drawn from each woman on the third day of the menstrual cycle. Assessments of MDQs and blood samples for the determination of homocysteine and NO concentrations were performed at baseline and within the first 3 days of their next menses after completion of yoga intervention. Results: A total of 30 women from the dysmenorrheal group and 30 from the control group completed the study. Homocysteine levels were higher in those with dysmenorrhea when compared with healthy controls before yoga intervention (Mann-Whitney U test, p