Exercise is one of the most useful tools for managing PCOS, and this chapter covers how to approach it. It explains how activity can improve insulin sensitivity, lower androgens and help regulate the menstrual cycle. Moderate aerobic exercise, resistance training and yoga are each discussed, along with a weekly target for vigorous exercise and the time it may take to see results. The chapter also warns that overtraining can raise cortisol and lists signs to watch for. It offers starting points for different fitness levels and closes with the benefits of movement for mood, anxiety and body image.