Philip Maffetone has been a private practitioner, health and athlete coach and consultant, published independent researcher, respected pioneer in the field of complementary sports medicine, and internationally recognized educator and author in the fields of nutrition, biofeedback, exercise physiology, and athletic training over the course of his forty- year career. Since 1977, he has used the term "" overfat"" and has recommended low-carbohydrate and healthy fat eating.