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Dr. Fredrick Peters

Fredrick Peters Ph.D. ACSM-EP


Dr. Fredrick Peters started The Fitness Doctor after earning his PhD in Exercise Physiology. His decision to go into business was prompted by his desire to help clients by offering a medical approach to personal training (an industry that is completely unregulated). Dr. Peters saw this "knowledge gap" in his own personal experience as an avid fitness enthusiast.

He believes personal training should be prescribed to the individual and should not be a "one-size fits all approach". Furthermore, he strongly believes that this exercise prescription should be given by a qualified healthcare professional. 

Dr. Peters serves as a consultant for several organizations including: the Cleveland Clinic, the Visiting Nurse Association of Ohio, the Centers for Families and Children, and Heinen's Fine Foods (among others).

Dr. Peters was voted Top Personal Trainer in Northeast Ohio by the Cleveland Hotlist. He possesses multiple certifications from the American College of Sports Medicine. He has been an expert guest for dozens of organizations including WKYC Channel 3, WJW Fox 8, and the Cleveland Clinic. Dr. Peters has been recognized by Cleveland Magazine, the Plain Dealer, and Crain's Cleveland (just to name a few). 

Dr. Peters is a member of the American College of Sports Medicine and the American Physiological Society.  He serves as an advisory member on multiple boards and has been published in multiple journals. He also serves on numerous panels including the ACSM Health & Fitness Journal and the Cuyahoga Valley Career Center Sports Medicine program.   

In addition to The Fitness Doctor, Dr. Peters is an advisor, consultant, and professor of Applied Exercise Science.

fitness doctor personal trainer

Kevin Kleis M.S.

Exercise Physiologist

Kevin earned his Bachelors degree in Exercise Science from Cleveland State University (CSU), as well as his Masters in Exercise Science. While working towards his Masters, he also served as a graduate/research assistant in the Health and Human Performance Lab at CSU that allowed him an opportunity to work on an exciting project with the engineering department for his Thesis.

Outside of his personal schooling, he also has a background teaching biomechanics and aiding the introductory exercise science course at Baldwin Wallace University. He became a personal trainer to help others and share his passion for health and wellness. Kevin is always looking for new and exciting ways to make exercise fun and keep his clients engaged by networking with other fitness professionals and staying up to date on current fitness research and trends. He has worked with all types of populations through his education, from those with no fitness background to collegiate athletes.

Besides the physical side of exercise, he also has a strong belief in the mental improvement that exercise provides and always strives to know his clients as well as possible. Kevin specializes in functional fitness, strength training, HIIT training, and has an additional certification in TRX, and is capable of prescribing programs to all types of clients with the help of his team at The Fitness Doctor.

Favorite Fitness Quote

"To me, success is not about what I've accomplished or achieved in life, but rather what I've helped others to accomplish and achieve"- Chris Powell

fitness doctor personal trainer

Liana Reyes CPT

Exercise Physiologist

Liana earned her degree in Exercise Physiology from Kent State University. She is certified through the National Academy of Sports Medicine (NASM). She possesses an extensive knowledge in stabilization and flexibility training. Her research interests include the impact exercise has on improving symptoms of depression
and anxiety.


She became a personal trainer to help educate clients on the benefits of exercise and help them fall in love with living a healthier lifestyle. She wants to make each client feel as comfortable as possible and have them truly enjoy their experience. She hopes to improve her client's confidence in their ability to perform exercise techniques. 

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