A Cochrane review [withdrawn from publication] included 1 study involving a total of 40 subjects. The available data could only be included as a narrative description. There appeared to be some evidence that exercise reduced the Moos' Menstrual Distress Questionnaire (MDQ) score during the menstrual phase (P < 0.05) and resulted in a sustained decrease in symptoms over the three observed cycles (P < 0.05).
Comment: The quality of evidence is downgraded by several shortcomings in study quality, by imprecise results (limited study size for each comparison), and by potential reporting bias (only 1 small trial reported).
).