Her Nancy Clark 's Sports Nutrition Guidebook her Food Guide for Marathoners and Cyclist 's Food Guide are available at www.nancyclarkrd.com and www.sportsnutrition.com .
Sports dietitian Nancy Clark , MS , RD is a bestselling author .
Nancy Clark author   Clark 's Sports Nutrition Guidebook her Food Guide for Marathoners and Cyclist 's Food Guide are available at www.nancyclarkrd.com and www.sportsnutrition.com .
Sports dietitian Nancy Clark , MS , RD is a bestselling author .