Most people who sync their diet to their menstrual cycle apply the same logic to their exercise regime. Just as natural hormonal fluctuations can determine your appetite and diet, they can also impact your energy levels and workout success.  During the follicular and ovulation phases, you may notice higher energy levels and feel more able to push yourself during workouts. In contrast, you may prefer a gentler exercise regime and more time between workouts during your menstrual phase. Tracking your cycle allows you to look for ways to switch your lifestyle to suit your changing body in terms of diet and exercise.