Dr. Dan Plews has a PhD in Exercise Physiology and has over 30 peer-reviewed publications. His athletes have won world and Olympic titles. He's also the 2018 Ironman Age Group World Champion (8:24:36)
Lucy Charles-Barclay of Great Britain (2nd), Chelsea Sodaro (1st) and Anne Haug of Germany (3rd) celebrate after finishing the Ironman World Championships. (Photo by Ezra Shaw/Getty Images for IRONMAN)