Perhaps the greatest of all Greek medical professionals was Herodicus of Megara who was considered a physician as well as what modern society would call an athletic trainer. He performed his duties almost 300 years before Galen, and his chief claim to fame is that was the teacher of Hippocrates who was to become the "father of modern medicine". As far as can be determined Herodicus of Megara was the first physician to recommend exercise as a method of treatment (Arnheim, 1993).
Today, Certified athletic trainers (AT's) are healthcare professionals who collaborate with physicians to optimize activity and participation of patients and clients. Athletic training encompasses the prevention, diagnosis and intervention of emergency, acute and chronic medical conditions involving impairment, functional limitations and disabilities. Athletic training is recognized by the American Medical Association (AMA) as a healthcare profession. There are 6 practice domains in athletic training. They include, prevention; clinical evaluation and diagnosis; immediate care; treatment, rehabilitation and reconditioning; organization and administration; and professional responsibility (Board of Certification forthe Athletic Trainer, 2007-2010).