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Dr. Jason Myers
Dr. Myers is the CEO and primary health care provider at Defy Medical Fitness.

He is certified by the Board of Osteopathic Medicine with a specialty in Family Practice. His medical degree was attained from the Michigan State University Osteopathic School of Medicine, and he also holds a Bachelor of Science degree in Biology and Chemistry from Aquinas College. Dr. Myers completed his Family Medicine training at Metropolitan Hospital in Grand Rapids, Michigan. Upon completion of this training, he served 3 years of active duty as a medical officer in the United States Navy.

Dr. Myers is active in continuing education and is a current member of the following professional organizations: American Osteopathic Association, American College of Osteopathic Physicians, American Academy of Family Physicians and the Medical Fitness Association. Also, a proud affiliate of Munson Medical Center, he is an avid community supporter. Working with the Defy Medical Fitness team, Dr. Myers will assess your current medical state to develop a customized health and fitness plan, and will also be available throughout the course of your membership to provide executive level primary health care if the need for treatment should arise.


Jason Myers
Tiffany Stone
Tiffany is a certified trainer and specializes in developing individual weight management programs. She has her Bachelors Degree in Nursing/Nutrition from Northern Michigan University. Tiffany has worked in a variety of settings with a range of health professionals. Previous experience includes professional training with college-level athletes in baseball, tennis and skiing as well as professional training with multiple-level athletes in marathons around the country. She has worked with physicians, chiropractors, acupuncturists, physical therapists and eating disorder specialists to create customized weight and lifestyle programs and is looking forward to doing the same with the talented team at Defy Medical Fitness.



Tiffany Stone
Sarah Harrelson
Sarah is a Traverse City native who has always had a love for health and fitness. She received a Bachelors Degree in Exercise and Health Sciences from Alma College with a focus on Exercise Physiology. She pursued her excitement for fitness by being a member of Alma College’s track and volleyball teams. Before moving back to Traverse City area, she completed two internships, the first with Lifetime Fitness in Shelby Twp. and the second for Gratiot Community Hospital in the cardiac rehabilitation department. Sarah has extensive experience in cardiac stress testing attained while working for Grand Traverse Heart. She is excited to be part of Defy Medical Fitness and is looking forward to helping patients not only pursue, but reach, their health and fitness goals.


Sarah Harrelson
Erik Petersen
Erik is an exercise coach certified through the C.H.E.K Institute. He has a Bachelors Degree in Exercise Science from Central Michigan University and is also a massage therapist with an emphasis on structural assessment. Erik utilizes elements from his varied background to develop sound, rational training programs to meet his client’s goals.


Tamara Graf Dipl.Ac., Dipl. C.H.
Tamara is Nationally Board Certified in both Acupuncture and Chinese Herbology. She is a graduate of SAMRA University of Oriental Medicine in Los Angeles where she obtained a Master Degree of Oriental Medicine in 1996. Tamara is a second-generation practioner of Acupuncture and Holistic Health. Her father, Michael Graf M.D. was a pioneer in the field Holistic Health and in Integrating Medicines and was the founder and president of The American Academy of Auricular Medicine and Scientific Acupuncture. In early 2007 Tamara began transitioning her practice from Kalamazoo to Traverse City and is now joining the team at Defy.


tamara Graf