Check out the Kindle book we published—a simple but insightful 20 minute read about high intensity exercise! It's not the calories burned DURING exercise. It's the calories burned AS A RESULT OF exercise.

Meet Our Personal Trainers

The Future of Personal Training

Bringing you the latest health and fitness science and research, the Quantify Fitness team consists of passionate and driven personal trainers—excited to help clients in the most effective and sustainable ways possible.

josh jarrett Josh Jarrett
CEO (Chief Exercise Officer), Founder

Josh has supervised thousands of high intensity workouts as a National Strength & Conditioning Association Certified Personal Trainer (NSCA-CPT). He is also a human performance coach, a Certified NeurOptimal Brain Trainer, and a Health, Fitness, Data and Technology Geek.

jessica jarrett Jessica Jarrett
Trainer, Co-Founder

Jessica is a teacher by trade and helps out with the day-to-day operations at the smart-gym as well as provides the most effective 10 minute workouts on the planet! You may also occasionally see our little boys taking on the ARX machines!

eli steele Eli Steele
Smartgym Manager & Trainer

Originally from Clarksville, TN Eli is an MTSU graduate where he received his degree in Exercise Science. Working in the Health and Fitness industry ever since, Eli is a firm believer that taking one step forward today can lead to boundless opportunities tomorrow.

amy wells Amy Wells
Smartgym Trainer

A former client turned trainer, Amy is a Louisiana native who has a passion for health, longevity, and biohacking. With backgrounds in Music Business and, most recently Cryotherapy, she spends her free time learning about wellness, testing new gadgets, and having conversations about anything and everything health related. When not biohacking, she has been known to write a song or two.

amie keller Amie Keller
Smartgym Trainer

Amie is an Ohio native who moved to the Nashville area with her husband and two kids. Amie was a veterinary technician for the past 20 years but has always had a passion for health and fitness. Now as a trainer at Quantify Fitness she is able to pursue her passion and continue learning about longevity, health, and evidence-based exercise.