"Dr. Hatfield has taken his many years of experience in the field to produce a complete encyclopedia of information that every sports enthusiast should know. This is the first book I have ever seen that combines the knowledge of herbalism with performance training and a nutritional focus. It teaches readers how foods are digested and assimilated by the body and how athletes can adapt their bodies to the stress of competitive training while enhancing their cardiac output and mental concentration. is a must for everyone who is athletically inclined, including athletes and personal trainers interested in keeping their competitive abilities in this growing and competitive field." -- Dr. Earl L. Mindell, RPh, PhD, author of