How menstrual cycles affect female cyclists' training and performance

This study wants to understand how a woman's menstrual cycle affects her cycling performance, training ability, and recovery. Researchers will track female cyclists' menstrual cycles together with their training data collected through the JOIN cycling app to see what patterns emerge and whether the cycle influences things like power output, heart rate, and how hard training feels.

Many female cyclists are trying to adjust their training around their menstrual cycle, but there's very little scientific evidence about whether and how this actually helps. This research also aims to identify and help prevent menstrual cycle disorders in female athletes, which can cause fatigue, slow recovery, and serious long-term health problems like bone loss and heart disease.