Ginger Dr. Ginger Schirmer, PhD, RD is a registered dietitian with a doctorate degree in Nutrition and a masters degree in Exercise Science. Dr. Schirmer is also a certified Pilates and Yoga instructor and President/CEO of HealthCore, Inc., an exercise company specializing in fitness and nutrition. With over 20 years of practical and clinical experience, Ginger has created the new innovative CoreGym™ EX training system for strength, stamina, and weight management. The CoreGym™ EX system is based on Ginger's philosophy of simplicity and attainability and has produced amazing results in numerous individuals.