Have you ever wondered whether or not women are more prone to training fluctuations? Do you know why? As one constant, but fluctuating factor, the menstrual cycle greatly impacts female performance. In our series of articles by Dr. Stacy Sims, MSc, PhD, an exercise physiologist and nutrition scientist from Stanford, October’s article is focused on the science of training in relation to the female menstrual cycle and how women can better training by cycle syncing.