LTC Nick Barringer LTC Nick Barringer is an expert on nutrition and performance for the tactical athlete. Previously while working at the United States Army Research Institute of Environmental Medicine he researched Warfighter nutritional requirements in differing environments to include deployed Special Operators. Prior to that, he taught performance nutrition at the Army-Baylor Graduate Program in Nutrition. Nick served in the 75th Ranger Regiment as a member of the Ranger Athlete Warrior (RAW) program where he oversaw the nutrition and aspects of the physical training of Rangers. Nick received his undergraduate degree in dietetics from the University of Georgia and his doctorate in kinesiology from Texas A&M. Articles Are you Strong Enough? An Interview with Mark Rippetoe