We were joined by McMaster University PhD. candidate Lauren Colenso-Semple who is studying the influence of exercise, nutrition, and hormones on skeletal muscle, specifically as they relate to the menstrual cycle. She has an extensive background not only in academia, having worked with a veritable "who's who" of exercise science researchers in her journey to her PhD studies, but she also is an experienced personal trainer. In this episode she helps us understand whether "menstrual-cycle phase based training" is truly based on firm evidence, or if in some cases, the popular guidance sometimes extends beyond what we currently know (and what makes sense from a physiological perspective). Make sure to tune in to learn what we do and don't know on this fascinating topic.