Tim N. Ziegenfuss, Ph.D., CSCS is the Chief Executive Officer of The Ohio Research Group of Exercise Science and Sports Nutrition. "Dr. Z" is a well-known author, speaker, and researcher with expertise in exercise training, nutrition, dietary supplements and sports performance. He is a fellow of the International Society of Sports Nutrition, a Certified Strength and Conditioning Specialist, and has recently been appointed Chair of the exercise physiology and sports nutrition program at the American Academy of Nutrition.

Dr. Z earned a Bachelor of Science degree from Lock Haven University, a Master of Science degree from Purdue University, and a Doctorate from Kent State University. During his five-year tenure as a professor, he taught undergraduate and graduate level courses in exercise physiology, metabolism and body composition, anatomy, physiology, pathophysiology, and sports nutrition at Lock Haven University and Eastern Michigan University.

In addition to authoring and co-authoring several book chapters on nutritional ergogenic aids, antioxidants, protein, and over-the-counter hormones, Tim has written numerous articles in Physical Magazine, Muscular Development, and Flex. Because of his research emphasis on dietary supplements and exercise physiology, he is routinely sought after as a consultant by top sports supplement companies and as an expert witness by law firms.

Contact: tim@ohioresearchgroup.com