A Boutique Gym Built on Measurable Progress

In Scottsdale, Arizona, proof3 is rethinking what small-group training can look like. Their 2,500-square-foot boutique facility runs on a simple but powerful framework: Prepare, Lift, Breathe. Each session begins with education, moves into strength training, and ends with aerobic conditioning.

But what truly sets proof3 apart is their proof360 Assessment: a comprehensive onboarding that evaluates body composition, movement quality, strength, and recovery, all tracked through wearables and integrated into their app. The goal is to provide measurable progress for every member, from their first day to their quarterly re-assessment.

“Our mission is to deliver scalable, coach-led training that drives real, measurable outcomes. We want every member—whether they’re 25 or 75—to see progress they can feel and track.”

Carl Hardwick, Co-founder of proof3

Why Core Training Was a Pain Point

For years, gyms and studios have wrestled with the same problem: how to make safe and effective core training available to everyone.

• Hanging exercises are dangerous and inaccessible to most members.
• Cable-based core work gets stale and offers limited progression.
• The humble ab wheel is intimidating, often feeling unsafe even for experienced athletes.

Proof3 needed a tool that could make advanced, functional core training accessible, scalable, and confidence-building for all members.

Introducing ZeroWheel

When proof3 first trialed ZeroWheel, the response exceeded expectations.

“I’ll be honest, when I first saw it, I thought it might be a gimmick. But once our members tried it, I realized this was something truly special.”

Carl Hardwick, Co-founder of proof3

Proof3’s coaches integrated ZeroWheel into strength sessions. Each introduction began with a short, coach-led orientation: turn on the power, understand the dial, and feel the difference between assistance and resistance.

In less than a minute, even skeptical members were rolling with confidence.

Members Quickly Gained Strength and Confidence

What happened next was the proof point.

• Accessibility. Members who had never performed an ab rollout—and never thought they could—were suddenly succeeding.
• Confidence. With adjustable assistance, members quickly progressed from high support to more challenging settings, building strength and self-belief.
• Rehabilitation. Coaches used ZeroWheel with members managing lumbar issues or mobility limitations, helping them rediscover safe, stable movement patterns.

“There’s this immediate gratification [with ZeroWheel] when someone realizes they can do something they thought impossible. You can see the confidence light up in their face.”

Carl Hardwick, Co-founder of proof3

proof3 Stands Out in a Competitive Market

Beyond member experience, ZeroWheel has added value to proof3 as a business:

• Differentiation. In Scottsdale’s competitive fitness market, ZeroWheel helps proof3 stand out with unique programming that other studios can’t match.
• Coach Support. Trainers find it easier to design scalable, progressive core workouts that engage both novice and advanced members.
• Engagement. ZeroWheel has become a talking point in proof3’s five-minute post-session education blocks, sparking member curiosity and enthusiasm.

For proof3, ZeroWheel is more than a new piece of equipment. It’s a tool that bridges the gap between the general population and elite athletes, making advanced core training accessible to all.

“From our 75-year-old member to our most experienced athletes, everyone can find success with ZeroWheel. That’s what makes it so powerful.”

Carl Hardwick, Co-founder of proof3

A Partnership Beyond Equipment

Proof3’s partnership with ZeroWheel has been a collaboration rather than just adoption.

Carl and his team provided valuable feedback on handle design, grip texture, and member education. They even offered to create testimonial content to help spread awareness of ZeroWheel’s utility in coach-led environments.

“Stay true to the utility of the product. Go really hard on what it does better than anything else in the world—scalable, functional core training.”

Carl Hardwick, Co-founder of proof3

Core Training for Every Member at Every Level

Together, proof3 and ZeroWheel are redefining what modern, coach-led fitness can deliver: safe, functional, and scalable training that builds confidence, strength, and longevity.