Re:built StrengtH
Take your training to another level with the RE:Built strength system. A proven system that allows you to train smarter, get stronger, and build your own knowledge.
Coaches need Coaches
Truly customized one on one coaching, real time feedback, and educational opportunities for you to become a better coach.
Hi!
I’m Justin Farnsworth.
I am a Doctor of Physical Therapy and Board Certified Sports Clinical Specialist with over a decade in medicine and over 20 years in high performance and general fitness as a coach.
I am honored to have the opportunity to lead over 100 in person certification courses since 2020. Having worked on all sides of the training and rehab spectrum, my passion is to educate both clinicians and coaches.
My goal is empower both coaches and clinicians with practical knowledge that is evidence-based, actionable, and adaptable to real-world client needs.
I do this through my RE:Built System. This system is truly customized with real time feedback for each client. Which is designed to not only help you crush your goals in the gym, but also become a better coach.
Furthermore, I offer both my Programming Around Pain Certification and Re:Built Strength Certification for coaches and physical therapists.
Let’s level up together!
what clients are saying
Dr. Cierra Lowe, PT
Justin’s coaching has helped me prioritize my own health and fitness without burning out while caring for my patients and clients. As someone who strives to provide compassionate, individualized care, it’s meant the world to receive that same level of support from him. I feel confident navigating any pain points or challenges that pop up while also kicking ass in the gym with him as my coach. As a clinician, I know the importance of not treating yourself, and having someone I trust with true expertise is invaluable.
Grace Valentic
Coach and Owner Grow Grit and Grace Coaching
I started working with Justin because I was constantly hitting setbacks from chronic pain after years of ballet. Within a few months, my pain dropped, my lifts skyrocketed, and I was training harder than ever. I’ve nearly doubled my old PRs and feel stronger, leaner, and more capable than I ever have.
But what really makes Justin different is how invested he is. The support, the detail, the way he explains everything—he actually makes you want to show up and work. You never feel like you’re guessing.
It’s been almost a year, and I’m not stopping anytime soon. Best decision I’ve made.
Jacob Mergl, MScPT
Physiotherapist, Sports Physio Ireland
These last three months have been the best stretch of training I’ve ever had. Strength is up, body’s changing, and for the first time in a long time—I’m actually excited to train again.
When I strained my hamstring mid-program, Justin adjusted everything on the spot. Rehab was built in, progress didn’t stop, and my confidence came back fast.
His structure, consistency, and the way he programs kept me locked in. I’ve grown as an athlete, coach, and even as a physio—this experience has carried over into how I treat and train others.
It’s rare to find someone this knowledgeable, this responsive, and this all-in. Easily the most rewarding coaching experience I’ve had.