Nancy Clark, MS, RD, CSSD (Certified Specialist in Sports Dietetics) is an internationally respected sports nutritionist. She offer one-on-one nutrition consultations to both casual exercisers and competitive athletes in her private practice in the Boston-area.

Clark specializes in nutrition for exercise, wellness, and the management of eating disorders. Her counseling includes teaching gymnasts how to lose weight healthfully, triathletes to eat for endurance, mountaineers to choose appropriate high-altitude foods, high school football players to "bulk up" and recreational exercisers to eat healthfully on-the-run. Her more renowned clients have included members of the Boston Red Sox, the Boston Celtics, the New England Blizzard (former women's professional basketball team) and many elite and Olympic athletes from a variety of sports: Kitty Carruthers (gold medal figure skater), Tim Mayotte (Wimbledon tennis player), Brad Faxon (PGA golfer), Kathy Ellis (woman's winner 1991 Bike Race Across America), Dana Rosenblatt (champion boxer). She has been the nutritionist for Bill Rodgers' & Joan Benoit Samuelson's Running Camps, Boston College's Sports Medicine Department, and the Leukemia & Lymphoma Society's National Team 'N Training Marathon Training Program. She is currently a consultant to the Boston Red Sox baseball team.

Nancy completed her undergraduate degree in nutrition from Simmons College in Boston, her dietetic internship at Massachusetts General Hospital, and her graduate degree in nutrition with a focus on exercise physiology from Boston University. She is a Fellow of the Academy of Nutrition and Dietetics (formerly the American Dietetic Association), recipient of their '95 Media Excellence Award and an active member of AND's practice groups for sports nutritionists (SCAN) and nutrition entrepreneurs (NE). She is recipient of SCAN's 1992 Honor Award for excellence in practice and 2008 Achievement Award. Nancy is also a Fellow in the American College of Sports Medicine, recipient of the 1994 Honor Award from ACSM's New England Chapter, and past-chair of ACSM's Nutrition Interest Group. She is member of the Sports Nutrition Referral Network for the US Olympic Training Center.

Enjoyed as an interesting speaker, Nancy attracts audiences from sports medicine physicians, dietitians, other health professionals, coaches, athletes, and the general public. She presents complex nutrition principles in a creative, straight-forward manner. Her experiences include presentations for the Boston Marathon, The American Dietetic Assoc.(now named the Academy of Nutrition and Dietetics), The American College of Sports Medicine, The International Food Information Council, the Wilderness Medical Society, The US Coast Guard, and The American College of Sports Medicine. She has led workshops for athletes at the Olympic Training Centers in Colorado Springs and Lake Placid. Her contributions to runners culminated in her receiving the 1994 Will Cloney Award.

Clark writes a monthly nutrition column called The Athlete's Kitchen which appears regularly in over 150 sports and health publications and websites, including New England Runner, American Fitness Magazine and . She frequently contributes to Runner's World, and is frequently quoted in the popular press. Clark has been the nutritionist for the Sports Illustrated for Kids' website, Senior Nutrition Editor at, columnist for The Boston Globe's sports pages and The Physician and Sportsmedicine. She currently is a nutrition expert at and

Clark's best selling book Nancy Clark's Sports Nutrition Guidebook, Fifth Edition (Human Kinetics 2014) is a valued reference. It offers both the scientific approach to eating for top performance, as well as the practical "how to" approach that includes specific menu ideas and food recommendations. It address issues such as what to eat before exercise, which snacks are best for quick energy, how to healthfully survive fast food restaurants--and answers the questions that active people of all ages and abilities ask about healthful, high energy eating. Nancy Clark’s Food Guide for Marathoners: Tips for Everyday Champions (Meyer & Meyer, 2011), Nancy Clark’s Food Guide for New Runners: Getting It Right From the Start (Meyer & Meyer, 2009), and The Cyclist's Food Guide: Fueling for the Distance (Sports Nutrition Publishers, 2011) are written from her passion for helping novice marathoners, runners and cyclists enjoy reaching their goals. Her downloadable MP3 chat on Dieting Tips for Active People: How to lose fat and maintain energy to train complements her books. She has co-authored Food Guide for Soccer: Tips and Recipes From the Pros (Meyer & Meyer, 2010) with Gloria Averbuch, in conjunction with Women's Professional Soccer.

Sports and nutrition are personal as well as professional interests. Clark has competed at the 10 Kilometer, half-marathon, and marathon distances. She was instrumental in founding The Boston Milk Run, a nationally recognized road race sponsored by the Massachusetts Dietetic Association. Clark routinely bike-commutes and enjoys bike touring. She has led many extended bike tours, including Bikecentennial's Trans-America Trip and other tours through the Canadian and Colorado Rockies. She has trekked into the Himalayas and she helped plan a menu for a successful expedition. Her newest sport is rowing (crew) and yoga. She lives with her husband, son, and daughter in the Boston-area.