In this episode, Carina discusses the significant impact of the menstrual cycle on running performance, emphasizing the importance of understanding hormonal fluctuations throughout the cycle. She breaks down the different phases of the menstrual cycle, detailing how each phase affects energy levels, performance, and overall well-being for female runners. Practical tips for managing periods while running and the importance of self-tracking are also highlighted, along with the need for tailored coaching for female athletes.