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John Fillman’s Arizona Performance Lab
People love to say they “train.” Most of the time, they’re just repeating comfort with a new label.
John Fillman built his Arizona performance lab for athletes who want a measurable edge, fewer injuries, better movement, faster readiness, and a recovery routine that actually compounds. He started as a dad with two high-level youth athletes (baseball and volleyball) who couldn’t find the kind of integrated training environment he wanted on the west side of Phoenix. So he built it: smart proprioception boards, a daily neuromuscular warm-up, objective performance testing, and a recovery culture anchored by NerveOTX direct current therapy.
The origin: a “BOSU ball” that wasn’t a BOSU ball
During the middle of COVID, John’s business partners found a training platform concept that could serve multiple worlds at once. Their other company had ties to the military space and was being asked to design training that didn’t require live rounds down range. They needed something that challenged proprioception training, balance, coordination, and movement control, skills that matter for special operations and for athletes who need durability under speed.
Operators were skeptical at first (“looks like a BOSU ball”), but the moment they ran drills inside a simulator environment, the tone changed. The work was hard, specific, and useful. That’s when the vision expanded: if proprioception training can improve movement competency under stress for operators, it can improve performance and durability for athletes.
5,000 square feet of experimentation… and proof
They started with 5,000 square feet in Arizona and treated it like an R&D playground, boards, weights, a batting cage, simulators, and whiteboards everywhere. For months, the goal was simple: test ideas and keep what works.
They didn’t want “cool.” They wanted proof. If a protocol claimed to improve throwing velocity or bat speed, they wanted objective verification, radar, hitting tech, and enough redundancy to separate real improvement from normal device variance. That obsession with verification is what made the lab credible. It wasn’t “trust us.” It was “here’s what changed.”
Out of that phase came a daily ritual that now defines the facility: the neuromuscular warm-up.
The neuromuscular warm-up: daily proprioception training that cuts injuries
Every athlete who enters John Fillman’s facility starts in the same place: the neuromuscular warm-up. Built with medical input, it functions as a daily nervous system reset. It’s not a stretch line. It’s proprioception training for balance, joint control, and readiness before the athlete ever touches a ball or a barbell.
Once the neuromuscular warm-up became non-negotiable, John observed a drastic downturn in ankle and knee injuries. Better proprioception training means better movement decisions under speed, cleaner landings, better cuts, fewer “random” tweaks.
A facility with levels, not random memberships
You can’t just walk in and buy a membership. There’s an onboarding conversation first because the program is a path. John isn’t interested in three summer months; he wants multi-year development that carries an athlete to college and brings them back when they’re home.
The “Futures” group (under thirteen) spends most of its time on proprioception training boards and movement learning. High school athletes earn more access, but still progress through structured group training before more freedom. It’s an academy model: graduate into complexity as you prove you can handle it.
The ecosystem gets a pitching anchor: Coach John Huizenga joins
After expanding to roughly 11,000 square feet, John Fillman got an unexpected visitor: Coach John Huizenga, known for working with high level pitchers, walked into the facility. John wanted elite pitching for his own son; Huizenga wanted a home base and loved the boards.
The partnership made the lab even more valuable for baseball families: elite coaching plus proprioception training plus a serious sports performance and recovery culture in one place.
Recovery as a competitive advantage, not an afterthought
John’s core belief is simple: recovery isn’t separate from performance, it is performance. He treats sports performance and recovery like one system, not two categories. His son’s routine reflects that: daily recovery habits, cold plunge work, BFR, and structured use of NerveOTX direct current therapy.
At first, his son used NerveOTX direct current therapy mostly for recovery. Then he experimented with pregame use and felt ready faster. John described it like coffee or pre-workout: NerveOTX direct current therapy becomes a nervous system primer. Less time “searching for your arm,” more time throwing with intent.
That shift matters for pitchers. A shorter warm-up is often a safer warm-up, and better sports performance and recovery habits keep the body consistent throughout the season.
The honest science moment: “We don’t know why, but it works”
A refreshingly honest theme came up: outcomes sometimes come before full explanation. In the direct current world, many clinicians and researchers agree on the same thing: direct current therapy works—even when the mechanism isn’t fully understood in a neat, packaged way.
That’s not a weakness. It’s a reminder of how medicine has always evolved. We observe outcomes, refine protocols, and keep learning. Dr. Varveris’ perspective is grounded in reality: don’t be so close-minded that you reject what the body is showing you. Focus on what improves function, reduces limitation, and restores confidence.
That’s why NerveOTX direct current therapy is treated like a tool in a bigger system; not the whole system. It works best when it’s paired with movement, education, and foundational health practices.
“How often should we use direct current?” (The real answer)
This is the most common question John hears: how often should we use NerveOTX direct current therapy?
His answer is practical: recovery should be daily, and NerveOTX direct current therapy can be part of a daily sports performance and recovery routine. Not everyone will do it and that’s fine, but the athletes who commit to consistent recovery get the biggest results.
He also emphasizes personalization. NerveOTX provides a playbook of protocols, but nobody’s routine is identical. Some athletes love certain setups; others prefer different patterns. The job is to guide experimentation, track response, and build a repeatable routine.
Bullpens: direct current before the mound
Bullpens at John’s facility are structured events. Pitchers have a time slot to be on the mound, but preparation starts earlier: arm care, movement prep, and nervous system readiness.
For many athletes, NerveOTX direct current therapy is now part of that bullpen workflow. They’ll use it before throwing, pair it with movement tools, then head to the mound feeling more organized. That readiness effect is the real value: better positions available before the first high-intent throw.
The DX500: real recovery while life keeps moving
John isn’t a medical professional, but he’s obsessive about outcomes. After a car accident left his back flaring during travel weekends, the DX500 became a daily staple. It lives in his bag. At a volleyball tournament in Vegas, after days on concrete and hotel beds, he sat at games with the DX500 running on his back, relief without leaving the bleachers.
That portability is why the DX500 fits modern sports performance and recovery: the best tools are the ones you can use consistently without a clinic visit every time.
Smarter stacking: pairing BFR and NerveOTX
BFR recovery cycles can run thirty minutes. John often pairs BFR with NerveOTX direct current therapy to maximize the window, blood flow strategies and nervous system input at the same time. It’s efficient, repeatable, and easier to stick with, which is what turns sports performance and recovery into a lifestyle instead of a once-a-week appointment.
The foot bath protocol: the lower-body reset that changes the week
One of the biggest “wow” tools in the lab is the foot bath protocol. The foot bath protocol helps athletes reset their lower body after high volume days, especially when the feet, ankles, and calves are cooked. The foot bath protocol also fits the philosophy of proprioception training: better input through the feet often means better output above.
John has watched athletes become believers when the foot bath protocol turns a heavy, sluggish lower body into something that feels responsive again. In a facility obsessed with consistency, the foot bath protocol becomes a reliable lever.
The Achilles comeback story: the foot bath protocol in real life
John’s performance coach, Jess, dealt with a non-surgical torn Achilles, an injury that usually shuts people down. Her plan stayed consistent: the foot bath protocol, BFR, and gradual progressions. Over time, she moved from boot dependence to walking without the boot. The foot bath protocol wasn’t the only ingredient, but it was a consistent part of the system that helped her keep moving forward.
This is what the lab teaches: recovery tools matter, but the real superpower is repeatability.
The confidence effect: when athletes trust the system, they let it rip
John says the biggest difference he sees isn’t just tissue response, it’s confidence. When athletes trust their sports performance and recovery routine, they stop forcing. They stop hesitating. They compete with less mental friction. Even if a small part of the effect is placebo, the outcome is still real, confidence changes mechanics, readiness, and output.
NerveOTX direct current therapy plays into that confidence because athletes feel “on” faster, and they feel better the next day.
The blueprint: what John Fillman’s lab teaches any serious athlete
John Fillman’s Arizona performance lab is a blueprint for modern performance:
- Proprioception training is foundational, not optional.
- A neuromuscular warm-up reduces injury risk when done daily.
- Sports performance and recovery must be treated as one system.
- NerveOTX direct current therapy is most valuable when used for both activation and recovery.
- The DX500 makes consistent recovery possible anywhere.
- The foot bath protocol is a cornerstone for lower-body recovery and nervous system reset.
Standards create outcomes. When athletes do the boring things daily, the results show up in the big things, durability, confidence, better movement, and fewer setbacks.
Want a recovery routine that actually compounds? Start building your sports performance and recovery system with NerveOTX direct current therapy, a consistent neuromuscular warm-up, and foundational proprioception training, then stack days until your body has no choice but to adapt.
