Jenn Stine
Since working with Jack, I’ve learned to see sleep, happiness, diet, and movement as one complete picture, and to keep who and what I value most at the center of it all.
The biggest change I’ve noticed since working with Jack has been a complete shift in my health and happiness. I’ve realized that healthy living is more than lifting weights — it’s about balance, awareness, and growth. Jack encourages you to look at the whole picture of your life, and his unmatched humor and encouragement give you the confidence to try things you never thought possible. I now recognize how powerful nature, movement, and mindset are to overall well-being.
Ten years ago, I broke both feet and had to wear a boot almost every few months. Since training with Jack, I haven’t needed a boot once. I also had degenerative disc pain that nearly required surgery — that pain is now completely gone. On top of that, he resolved my shoulder issues through diligent corrective work. I’m pain-free across the board.
If someone’s on the fence about working with Jack — do it. He literally changed my life. It’s the best investment I’ve ever made. Jack takes the time to design unmatched programs with extreme detail and reasoning. He knows how to pivot exercises on the spot and always meets you where you’re at. He’s meticulous, challenges appropriately, and makes you feel completely taken care of.
Jack is fun, relatable, and creates an environment of trust. He speaks without judgment, meets you with empathy, and truly cares about his clients. I’ve never had a coach change so much for me in such a short time. He has my highest recommendation.
Patrick Cain
“I came to Jack with shoulder pain and an old ACL injury that I thought I’d deal with forever. Within a month, I ditched my brace — and over the next year, we nearly eliminated all my pain. My knee stability and balance have completely transformed. I’m stronger, more stable, and more confident than ever. At 54, I feel like I can achieve anything.”
Zach Gershuni
“Working with Jack has been one of the most educational and rewarding experiences of my 44 years. He’s given me a masterclass in holistic health and completely changed how I think about training and coaching.
As a high-school athlete, marathoner, and now a busy parent, I used to live by a ‘work hard, play hard’ mindset that left me exhausted and injured. Jack rebuilt me from the ground up — teaching me how to train intelligently and live in balance.
I’ve lost over 30 pounds of fat, gained muscle, and built a strong, functional core. My posture, sleep, and energy have all improved, and my chronic low-back pain is gone. For the first time in my life, I train without injury, move freely, and recover quickly.
The CHEK system Jack uses is the most elegant, practical, and effective training method I’ve ever encountered. Anyone can make you tired — Jack makes you strong, durable, and pain-free. He’s a consummate professional who genuinely cares about his clients and lives what he teaches.”
Mike Norris
Working with Jack has been like attending a master’s program in anatomy, physiology, and kinesiology. I’ve learned so much about how the body connects — and how being out of balance in one area was causing the issues I felt elsewhere.
We focused heavily on strengthening and balancing my core. At almost 50 years old, my core is more stable now than it was when I was pitching in college. I move with confidence in ways that used to cause pain and fear before working with Jack.
When we started a year and a half ago, I had pain in my hips and back just from walking. Over time, Jack completely rebuilt the way I breathe, walk, and move. We started with simple bodyweight movements and progressed to a foundation of balance and strength that allows me to move pain-free and without risk of injury.
What sets Jack apart is his continual improvement mindset — he’s always learning and weaving new research into his programs. He adapts each session to where your body is that day. On mornings after poor sleep, he adjusted our training so I could still benefit without pushing into fatigue. That level of care is rare.
In a year and a half, I’ve gone from constant pain to living a pain-free life. And the crazy part is — we didn’t even tap into all of his tools around sleep and nutrition. I know if I had, I’d be even further along. Jack’s knowledge, adaptability, and passion for helping people heal make him the best coach I’ve ever worked with.
Eric Tunquist
Jack brings structure and discipline to my workouts. His emphasis on thorough stretching and proper form when strengthening has completely changed my approach to fitness.
As a marathon runner, I’m thrilled to now run pain-free — and I attribute that directly to Jack. He identified the root causes of my pain and built a program of targeted stretching and strengthening that resolved the issues. He also takes the time to explain the “why” behind every movement, helping me understand how each exercise improves gait, stamina, and overall performance.
I wholeheartedly endorse working with Jack for three key reasons: his deep knowledge of the body, his attention to detail that ensures safe and effective execution, and his patience and engagement with his clients.
In two years, Jack has never missed a session, never been late, and never been anything less than professional and encouraging. Those qualities might sound simple — but they’re rare. After working with him, I just ran my 100th marathon pain-free, and that says it all.
Jenn Farely
"I found Jack after 9 months of failed attempts to fix my back pain. Injections, PT, rest, McGill. Nothing helped. What stood out was that he actually went through a back injury himself. That gave me instant trust.
Within the first couple weeks, my sleep improved, my mindset shifted, and I finally felt like someone was looking at the whole picture, not just throwing exercises at me.
He adjusted my plan based on how my body responded. No push through the pain mindset. Just genuine care.
The focus on lifestyle, sleep, nutrition, and stress was a game changer. It was the first time I felt like I was actually healing."