Jennifer O'Donnell-Giles MS RDN CSSD
Board Certified Sports Dietitian, Speaker, Writer, Exercise Physiologist, Triathlon Coach and RRCA Running Coach
Jennifer has 24 years of experience working with athletes in all sports and of all ages. She thrives on helping athletes achieve their goals!
Jennifer also has myriad of consulting experience from corporate wellness (GE, Pfizer, Meryl Lynch, Alan and Co.), to Clinical Hospital(Greenwich Hospital, Stamford Hospital, Columbia Presbyterian Hospital, LIJ-North Shore), Community Fitness (YMCA, and personal training facilities). Jennifer works with all athletes of all levels and abilities.
She sits on the USOC (United States Olympic Committee) dietitian registry and works with Olympic hopefuls, NCAA Student-Athletes, Prep School Athletes, Adult Athletes and Youth Athletes. Jennifer also writes for publications, speaks to teams, and consults with schools and recreation facilities. She is an author, and a freelance writer and also a faculty member of MySportsRD.com.
Jennifer is also an adjunct Professor of Sports Nutrition at Columbia University -her Alma Mater.
Jennifer’s background is unique in that she was a youth athlete (swimmer and softball player) turned adult athlete (runner, open water swimmer and triathlete) who married an athlete (runner and triathlete) and is now the mother of four little athletes (Swimmers, hockey players and lacrosse players). In other words she knows the expectations of all moving parts for athletics - coaches, parents, sports organizations as well as athletes’ own expectations.
Fun Facts
Jennifer’s sports career has included being A Rev3 Triathlon Ambassador, A Base Performance Sponsored Athlete, A Member of the PowerBar Advisory Board, The Sports Nutrition Expert for NutriBullet, A Blogger for Nutriliving.com, RD411.com, Active.com, and Appetite 4Health. She authored 3 books for MySportsRD (Nutrition for Swimmers, Nutrition for Lacrosse Players and Hydration for all Athletes), and author and editor for CanFitPro Certification program.
Jennifer is a multiple Ironman Finisher, Multiple Marathon finisher (including the Boston Marathon), A three time All American Triathlete, and represented the USA three consecutive years at ITU (International Triathlon Union) World Championships competitor.
"I am a 59 year old endurance athlete who has been competing in triathlon for 7 years. I have had the extreme pleasure of working with Jennifer Giles as my coach and nutritionist throughout my triathlon career. When competing in triathlon, nutrition is the key to having a good race. Jenn was spot on for everyone of my races. For each race, Jenn put together a detailed plan for each one of my disciplines, telling me when and what to eat. I also received pre and post race nutrition plans that were crucial to preparing for my race as well as properly recovering from each race. I am pleased to say that I felt strong and still had “plenty of fuel in the tank” every time I crossed the finish line. I highly recommend Jenn Giles as a sport’s nutritionist and coach."
- Lisa Sperry
Triathlete
