Nancy Clark, MS, RD, CSSD, renowned author and board-certified specialist in sports dietetics, is known for her ability to translate the science of nutrition for exercise and health into practical tips to enhance performance, manage weight, and resolve eating disorders. She has a private practice at Healthworks Fitness Center in Chestnut Hill, Massachusetts, where she offers nutrition consultations to both casual exercisers and competitive athletes. Her more renowned clients have included members of the Boston Red Sox, the Boston Celtics, and many collegiate, elite, and Olympic athletes from a variety of sports. She is also an advisory board member of Mizuno, Medical Wellness Association, and the Aerobics and Fitness Association of America.

An internationally known lecturer, Clark has given presentations to professional groups such as the American Dietetic Association (ADA) and the American College of Sports Medicine (ACSM), as well as team talks to athletes at Boston College and coaches with the Leukemia & Lymphoma Society's Team in Training national coaches certification program. She offers workshops nationally to health professionals with her sports nutrition workshop series. As a result of her renowned work, her photo and nutrition advice appeared on the back of the Wheaties box after the 2004 Summer Olympics.

Clark received her bachelor's degree in nutrition from Simmons College in Boston and her master's degree in nutrition from Boston University. She completed her internship in dietetics at Massachusetts General Hospital. She is a fellow of the American Dietetic Association, recipient of its Media Excellence Award, an active member of ADA's practice groupof sports nutritionists (SCAN), and a recipient of that group's Honor Award. In addition, Clark is a fellow of the ACSM and a recipient of the Honor Award from ACSM's New England chapter. She is also the recipient of the 2007 Simmons College Distinguished Alumna Award.

Clark is the nutrition columnist for New England Runner, Adventure Cycling, and American Fitness and is a frequent contributor to sports and fitness publications such as Shape and Runner's World. Clark also writes a monthly nutrition column called "The Athlete's Kitchen," which appears regularly in over 100 sports publications and Web sites. She has authored Nancy Clark's Food Guide for Marathoners: Tips for Everyday Champions and The Cyclist's Food Guide: Fueling for the Distance.

Clark has competed at the 10K, half-marathon, and marathon distances. She has led many extended bike tours, including a Transamerica Trip and other tours through the Canadian and Colorado Rockies. She has trekked into the Himalayas and planned the high-altitude menu for a successful expedition. Her newest sport is rowing. She and her husband, son, and daughter live in the Boston area.