Dr. Mark J. Smith is Dr. Cordain's first graduate student to study Paleolithic nutrition and holds a master's degree in exercise and sport science and a PhD in physiology from Colorado State University. He has worked with Dr. Cordain on Paleolithic nutrition since 1990. For over 30 years, Dr. Smith has helped people solve or ease health conditions using The Paleo Diet, making him one of the most experienced Paleolithic nutrition educators in the world. He is also a leading expert on supramaximal interval training and maintains a health and conditioning office near Palm Springs, California.