The proof3 Assessment · Scottsdale, AZ
One read of what it’s made of, how it moves, and what it can produce — and what to do next.
Sixty minutes. No fitness required. The results are yours either way.
Watch it first
So you know exactly what you can expect.
What we measure
01Body
Body composition & grip strength
02Move
Movement quality
03Power
Force and speed, side by side
Worth being clear aboutPower is not strength. Strength is how much you can move. Power is how fast you can move it. At proof3, we measure your strength daily in your training results. Power gets measured in your assessment, because it is the one the research ties most closely to longevity.
One number
Your three test results combine into a single score. It is not a grade and there is no passing mark. It is a starting line — the thing your next assessment gets measured against.
Reassessed every three to six months. Same tests, same conditions.
prf Score™
An example, not a target. Yours is whatever it is on the day — and the only number it ever gets compared to is your own.
Why these 3
How much force you can produce, and how fast, turns out to track something bigger than training. In large studies it tracks how long people stay independent.
+16%
higher risk of death from any cause, per 5 kg of grip lost
The PURE study followed 139,691 adults across 17 countries. Every 5 kg drop in grip strength came with a 16% higher risk of death from any cause. Grip predicted mortality more strongly than blood pressure did.
Leong et al., The Lancet, 20156–7×
the risk of death for the lowest muscle power versus the highest
In 2025, researchers followed 3,889 adults aged 46 to 75 for about eleven years. Those with the least muscle power were six to seven times more likely to die during the study than those with the most. Maximum strength was the weaker signal. Power was the stronger one.
Araújo et al., Mayo Clinic Proceedings, 2025Why
So here is the reasoning instead
Moving well is what lets you train hard without getting hurt, and training you can repeat is the only thing that changes a body over years. Better range, control and posture mean more of the work you do actually lands, and fewer of the setbacks that send people back to zero. That is what keeps a life full — carrying your own bags, getting off the floor, saying yes to the hike.
As the evidence gets better, our assessment changes with it. What we can do today is measure what the evidence currently points to, show you exactly where you stand, and build your training around it. We can’t promise you more years. Nobody honestly can. The proof3 Assessment is a fitness assessment. It is not a medical test and it is not a diagnosis.
And yes — how you look
Toned isn’t a type of muscle. It’s having enough of it, under less fat. Those are two separate things that move in different directions, and a bathroom scale can’t tell you which one just changed.
Muscle
You have to build it. It is the part that gives a body shape, and the part that disappears first if nothing asks for it.
Fat
You have to lose it to see the muscle underneath. Separate lever, separate timeline.
Why the scale can’t tell you
One number moving down can mean either. The InBody separates them, limb by limb, so you know which one actually changed.
What actually happens
01 · 5 MINUTES
Shoes off, stand on the InBody, hold the grips. The scan itself takes about a minute.
02 · 10 MINUTES
A coach walks you through a short sequence while the camera records how you move. There’s no score to flunk.
03 · 15 MINUTES
Six movements on Proteus. Short efforts. Total working time is a few minutes.
04 · 30 MINUTES
Your coach puts your report on the TV and walks you through it, line by line, until you know what every number means.
Nobody weighs you in front of anybody. Nobody comments on your body. Nobody tells you that you should have started sooner. Your results are confidential, they’re yours, and you can walk out with them and do nothing at all.
What you leave with
Every number arrives with what it means, where you sit, and what to do about it. Any term you don’t know is underlined — tap it and it explains itself. Body, Move and Power each end in recommendations, in plain words.
01
Not a grade and no passing mark — a starting line, with the reasoning sitting right next to it.
02
Three bars make a shape. The shape is the thing worth moving, and the report names which one is yours.
03
Not a score. A named cause, the gap drawn to scale, and the one thing we work on first.
04
Screen, to breakout test, to potential cause, to the three exercises that follow from it. You can see the reasoning.
05
Every movement and both sides, against a cohort — so the shape of your output is visible at a glance.
06
Your lean mass sets the calories and the protein. Change one input and everything downstream moves with it.
07
A 48 out of 100 stays a 48. The report is a measurement, not a sales document.
Every term defined in place — nothing to look up.
Save it as a PDF. Search any word in it.
Compare it against your last one, test by test.
What we do with it
01
Where you stand, and the three things worth working on first.
02
Thirty days built from your results: two coached assessments, a private 60-minute session, a nutrition strategy, and small-group training.
03
Small-group training, never more than 12, programmed from your numbers.
04
Same tests, same conditions, every three to six months. Progress as a number that moved.
Day oneEvery three to six months, from here on
Every step after the first is optional. Some people take the assessment and go train somewhere else. We would rather they had the data.
What it looks like over time
Marcy reassessed on the same three tests, in the same room, on the same equipment. Gaining muscle while losing that much fat, at the same time, is the hardest combination there is.
Skeletal muscle mass (lb)
+4.4 lb · up 9%
Body fat mass (lb)
−9.3 lb · down 21.4%
Visceral fat area (cm²)
−18.9 cm² · down 22%
Same InBody, same room, same conditions, every reassessment.
Marcy Morrow · eleven-month reassessment
“I really love the gym environment, but I’m there to build muscle and that’s exactly what I have seen. I replaced many of my Pilates classes with proof3, and I couldn’t be happier about it.”
Marcy Morrow · Real Estate Technology
“The body composition test completely blew my expectations. To see not just gains, but massive gains while working out at a lower volume was a real surprise.”
Sanjeev · proof3 member
What it costs
Right now: your assessment is free when you start proof30.
$150
All three tests, your report, and a 30-minute coached walkthrough of your results on the screen. Sixty minutes in total.
$100
Body composition and grip strength, then 30 minutes with a coach going through what it means.
The $150 comes off your proof30 if you start within 30 days. Both are one-off. Neither needs a membership.
And if you go on to proof30, it’s guaranteed.
Thirty days, training three times a week, then a second assessment within forty days of the first. If your prf Score hasn’t improved, we refund the proof30 fee. It has never come to that.
Common questions
No. The proof3 Assessment is a fitness assessment. It doesn’t diagnose anything, and it isn’t a substitute for seeing your doctor.
There is no fitness requirement and nothing you can fail. The effort portion totals a few minutes and your coach scales it to you.
No. You can buy an assessment on its own, or begin proof30 — two coached proof3 Assessments, a private training session, a nutrition and lifestyle strategy, and 30 days of small-group training.
No pressure. You can take your results and walk away, or use them to start progressing with us.
Wear comfortable clothes and athletic shoes. No need to stretch or warm up beforehand — the assessment is low-impact and guided by a coach throughout.
Monday and Wednesday: 5:00, 6:00, 7:30 and 9:00 AM, then 12:00, 4:00 and 5:30 PM. Tuesday and Thursday: 6:00, 7:30 and 9:00 AM, then 4:00 and 5:30 PM. Friday: 6:00, 7:30 and 9:00 AM, then 12:00, 4:00 and 5:30 PM. Saturday: 7:30 and 9:00 AM. Sunday: 8:00 AM.
Your first proof3 Assessment takes about 60 minutes: 30 minutes of testing, then 30 minutes reviewing the results with a coach. Later assessments take 30 to 45 minutes.
Every three to six months. That’s long enough for real change in strength, movement and body composition to show up as a number that moved.
Not at all. Fill in the form and we’ll take care of the rest. Once you start as a member we’ll set you up on the proof3 Member App to follow your assessment and training progress.
Book your assessment
No commitment. A coach will call you back — usually the same day.
An hour, three tests, and a report that tells you what to do next. Whether you train with us afterwards is entirely up to you.
