The following video is a recording of a seminar presentation given for coaches and athletes in May 2018, looking at the often mysterious and frustrating issue of gut problems during exercise. Presented by lecturer and PhD researcher Alan McCubbin, the video (~30mins) explains what gut issues occur during exercise, what causes them, and why it's so difficult to figure out through trial and error. It also describes the strategies that have been shown through research to work or not work, and the world-first gut assessment service run at the Monash Nutrition & Exercise Clinic.