ETHAN M. KREISWIRTH, PhD, ATC, is currently the Program Director for Rocky Mountain University of Health Professions in the Master of Science curriculum, is the owner of Kreiswirth Sports Medicine Systems, LLC, the Medical Director and Coordinator for the International Brazilian Jiu Jitsu Federation (IBJJF), and has over 20 years of clinical experience. Dr. Kreiswirth received Bachelor's and Master's degrees in Physical Education from California State University, Dominguez Hills, and a PhD in Athletic Training from Rocky Mountain University of Health Professions. He also holds certifications in the Functional Movement System, Selective Functional Movement Assessment, and Professional Rescuer Instructor for the American Red Cross. He has worked with the All American Heavyweights Boxing Team in conjunction with the 2012 USA Olympic Boxing Team, served as Head Athletic Trainer for California State University and in the Minor League Baseball system, and has consulted with the Chinese Olympic Committee providing sports medicine mentorships overseas. He has been a contributing author in peer–reviewed journals such as International Journal of Athletic Therapy, Journal of Athletic Training, and Athletic Training and Sports Health Care. Dr. Kreiswirth has been a national speaker on Brazilian Jiu Jitsu injuries, as well as a multitude of sports medicine topics at the National Athletic Training Association Annual Symposium, Far West Athletic Training Association, National Strength and Conditioning Association Symposium, and Association of Ringside Professionals.