The aim of this study was to compare the knee internal adduction moment during an unanticipated cutting manoeuvre in different phases of the menstrual cycle. Data were collected using a motion capture system integrated with a force platform. The knee internal adduction moment of four young women were compared in menstrual and ovulation phase of the menstrual cycle. The results of this study showed that knee internal adduction moment is higher in the time of ovulation phase and may increase the potential risk for noncontact ACL injury during this phase of the menstrual cycle. These results could affect the development of training schedules for women athletes
