Know More. Train Smarter.
Live Stronger

Find Your prf score™

Before you lift a weight or break a sweat, we help you understand where you are today so every workout, recovery, and habit move you closer to where you want to be.
Book Your Assessment
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Your Fitness Experience
‍Starts With Precision

Forget the generic approach. At proof3, our science-backed assessments uncover how your body moves, how it performs, and how your habits impact your progress, which allows you to begin and progress from a place of real knowledge, not assumptions.

Whether you’re looking to build strength, fix imbalances, or optimize for longevity, the right path forward begins here.

Option 1: proof360 Assessment

The Most Insightful Hour You Can Give Your Body
We created the proof360 Assessment to eliminate guesswork and information overload. In minutes, we capture a complete picture of how your body moves, performs, and responds to your habits.

We then use our proprietary AI systems to synthesize your data and turn it into real, actionable insights. Your results become a single, personalized number: the prf score. It’s your baseline for smarter training, better recovery, and lasting results.
What's Included In The proof360 Assessment?
Body Composition
via InBody
Movement Analysis
via AI Computer Vision
Strength & Power Testing
via Proteus Motion
Lifestyle & Habits
via Wearables
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Body Composition (via InBody)

We use the gold-standard InBody scan to measure:

• Lean muscle mass
• Body fat percentage
• Visceral fat levels
• Cellular health
• Muscle symmetry

These metrics show you how your body is built today and where to focus for strength, balance, and performance.

🔗 More on InBody's science

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Movement Analysis (via AI Computer Vision)

Using camera-based movement intelligence, we evaluate:
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• Flexibility
• Mobility
• Joint stability
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In just four minutes, we reveal key mobility or stability issues that may limit performance or raise injury risk and give you clear, actionable strategies to improve.

🔗How our computer vision measures your movement

proof3 salt river ipad for Computer vision movement assessment
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Well Rounded Lifestyle

This isn’t your standard gym test.
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With Proteus, we go beyond basic strength tests. We measure your full-force capability, acceleration control, and 3D resistance output, markers of functional performance that we can track over time.Your strength profile helps us build a program around what your body can do and where it should go next.

🔗How Proteus measures human performance

A tranparent background image of the Proteus Strength & Power Machine that proof3 uses to measure its members strength and power as part of the proof3 Pulse Assessment
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Lifestyle & Wearable Integration

What you do outside the gym matters.

Your coach can also connect to your wearable (via Rook) to integrate lifestyle factors like sleep, stress, and daily recovery, so we can make better decisions based on real life, not just gym time.
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🔗 How does Rook track so many wearables with such helpful info?

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Your prf score = Precision in Motion
Once all data is collected, our proprietary AI engine generates your personal prf score, a single, trackable number that reflects:
• Where you are today
• Where to focus next
• How to adjust over time

You and your coach will use this as your Proven Results Framework to measure progress and adapt your program, so your training works with your life.
Ready to Know More, So You Can Train Smarter?
Your path to a stronger, healthier, longer life starts with a clear picture of today.
Book your proof360 Assessment and get your prf score now.
Schedule Now

proof360 Assessment - Simple And Effective

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STEP 1

WORK ONE-ON-ONE
WITH A COACH

Its as simple as walking through the Body, Move, and Strength pillars with your coach

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STEP 2

GET YOUR REPORT WITH
EXPERT COACH ANALYSIS

AI systems create and print your report, and your coach walks you through key insights and recommendations

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STEP 3

VIEW YOUR DATA ANYTIME
IN YOUR OWN APP

Even though you'll leave proof3 with your report and coach notes, you'll also have your info digitally via email and in your proof3 app

Book Your Assessment

Option 2: InBody Scan + Coach Assessment

Backed by science. Built for you.
This isn’t your average weigh-in. The InBody Body Scan at proof3 Salt River uses advanced bioelectrical impedance technology to deliver a comprehensive, highly accurate breakdown of your body composition in just seconds.
You’ll get far more than weight and BMI. This scan analyzes:
Muscle Mass
Distribution
Body Fat Percentage
& Visceral Fat
Water Balance
Basal Metabolic
Rate (BMR)
Phase Angle
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Muscle Mass

See how your strength stacks up by region (arms, legs, torso).

🔗 How InBody technology works
‍🔗 InBody clinical validation studies

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Body Fat & Visceral Fat

Go beyond surface-level fat to understand the fat that matters most.

🔗 How InBody technology works
‍🔗 InBody clinical validation studies

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Intra and Extra-Cellular Water

Check hydration and inflammation markers through intra- and extracellular water ratios.

🔗 How InBody technology works
‍🔗 InBody clinical validation studies

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Basal Metabolic Rate (BMR)

Learn how many calories your body naturally burns at rest.

🔗 How InBody technology works
‍🔗 InBody clinical validation studies

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Phase Angle

A marker of cellular health and recovery potential (a key insight for longevity-focused training).

🔗 How InBody technology works
‍🔗 InBody clinical validation studies

Paired with a short Coach review, you'll leave with a smarter understanding of your body and a personalized path forward.
Who's It For?
If you’re looking for a quick, science-backed snapshot of your body’s current state, and want guidance without a full deep-dive assessment, this is for you.
Book Your InBody Body Scan
and Coached Assessment
Where It All Comes Together

Your Personalized Training Starts with Your Assessment

Once you complete your assessment, we use your results to build a personalized plan. And should you join proof3, your data informs how your coach guides you through each workout, so everything is tailored to your body and your goals. 

No guesswork. No generic classes. Just science, coaching, and a plan built around your body and your life.
Real Progress
Real Proof

Hear how data-driven coaching is changing lives. 

proof3 salt river member, Janice, doing barbell deadlifts in the proof3 salt river gym
I feel amazing about my progress at proof3. I work and have two children, so my time matters a lot to me, and knowing my coaches and program are outstanding is important. And, I LOVE training with the people at proof3. It's become a joy to be there!

Janice

proof3 salt river member, Brett, smiling while he does a landmine squat in the proof3 salt river gym
proof3 is a great environment to workout and get healthier! I struggled for years to getting to the gym regularly, but proof3 has me motivated to return as many times a week as I can. In just a few months, I'm feeling better than I ever have, and I'm 50!

Brett

proof3 salt river member, Maggie, doing dumbbell incline bench press in proof3 salt river's gym
I wasn't even looking for a new gym, but when I tried proof3's assessment and then their classes, I fell in love right away. I have a 9 month old baby girl, and knowing that I am building strength and longevity brings me a lot of peace. You'll love it there!

Maggie

proof3 member, Elena, laying on the ground smiling hugely
I've done plenty of fitness before, from CrossFit to training with a program on my own, but when I walked into proof3 I knew instantly that it was different. The coaches are fantastic, the classes are challenging but fun, and the technology is super cool!

Elena

A proof3 member, Jarryd, smiling big in the proof3 salt river gym with proof3 coach, Carl, standing in the background
I am a practicing chiropractor, and many fitness gyms ask me to try their gyms out, but I was blown away by proof3's assessment and coaching philosophy. I will be recommending proof3 to my patients for sure

Jarryd

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Ready to Begin?

Schedule your assessment today

Start your fitness journey today!

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FAQ

Common Questions

Some of the common things people ask about proof3TM
Learn More

How should I prepare for my proof360 assessment?

Wear comfortable clothes and athletic shoes that you can move in. No sweat, no warm-up. Just show up and we’ll take care of the rest.

How long will I need to take the proof360 assessment?

Sixty (60) minutes total.  The assessment itself takes about 30 minutes to complete. Then, reviewing the results with an experienced coach typically takes another 30 minutes because we want to make sure you understand what you can do to achieve your health and longevity goals, not just leave with another useless number in hand.

How often should I do a proof360 assessment?

We recommend you get a full proof360 assessment 2 x/yr. because strength gains can take a while to achieve.  The InBody body composition scan (one of the four pillars of the proof360 assessment) can be done more frequently if wanted (e.g., monthly).

How should I prepare for my InBody body scan?

Wear comfortable clothes. Note, consistency is key: for tracking your progress, it's best to take InBody scans under similar conditions each time (e.g., have similar hydration levels, fasting state, and time of day to make results comparable.

How long will I need to take the InBody body scan?

Thirty (30) minutes total.  The scan itself only takes about 5-10 minutes to complete. Then, reviewing the results with an experienced coach takes another 20 minutes because we want to make sure you understand what you can do to achieve your health and longevity goals, not just leave with another useless number in hand.

How often should I do an InBody body scan?

We recommend you do an InBody scan once a month with a coach to aid you in interpreting the results and developing your plan for the next  30 days.

How do I schedule an assessment?

There are a few ways you can book an appointment for an assessment:

1. Call us at 480-256-9966
2. Fill out the form in the section above and we’ll get you scheduled.
3. Go to proof3 Salt River on MindBody , look for our intro offers and select the assessment you want.  If you do not already have a MindBody login, you will be asked to create one.
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