Measured,
not guessed.

We're a mobile performance center built on one belief: your training should answer to your body, not an algorithm's guess about it. So we bring lab-grade assessment to where you train, put your numbers on the record, and keep a human in your corner. Four assessments. One record. Earned, not given.

Book a call For gyms and coaches
The same breath-analysis testing pro teams use·Mobile: the lab comes to your gym·Greater Boston
What an assessment looks like

Real numbers. No guessing.

01 · WE ASSESS

A protocol matched to you

Cardio, strength, sport, or resting: the assessment fits your goal, your level, and your sport, run with the methods used at the highest levels.

02 · YOU GET YOUR NUMBERS

Measurements, not estimates

Results interpreted on the spot, with one clear takeaway before you leave.

03 · THE STORY STARTS

Report, then The Record

Your full report within 48 hours, and your numbers live on in the app where progress gets tracked and the retest proves it.

The four assessments

Pick your starting point.

Cardio Performance Assessment

Your engine, measured from your breath. VO2 max, exact training zones, and where your body switches fuels.

Strength Performance Assessment

Your strength qualities, profiled: what leads, what limits, and where the fastest gains live.

Sport Performance Assessment

Built around your sport's real demands. For fighters: output round by round, and what fades under fatigue.

Resting Performance Assessment

Your true resting metabolism. What your body actually burns, measured, not pulled from a formula.

Every assessment includes an immediate takeaway, a full report within 48 hours, and access to The Record. Which one fits your goal is exactly what the call is for. Testing days at partner gyms run on founders pricing.

Book a call
Myth vs. measured

Your watch said 48.
The lab said 52.3.

Your watch's estimate
48

Built from wrist data and population math.

Measured from your breath
52.3

Enough difference to change your zones, your pacing, and your plan.

Wearables are good at trends and great at reminders. But the fitness numbers they show you are estimates. That is the difference between training off a guess and training off your body.

The Roster

Athletes who train measured.

Jake Pilla
Jake Pilla "The Gorilla"
Pro MMA · Featherweight
5-3

"[Their words, coming soon.]"

Jarrod St. Jean
Jarrod St. Jean "The Wolverine"
Pro MMA · Lightweight
4-0

"[Their words, coming soon.]"

Joe Peters
Joe Peters "Bam Bam"
BKFC / Pro MMA
2-0

"[Their words, coming soon.]"

Brendon Marotte
Brendon Marotte "The Kd"
Pro MMA
UFC Veteran

"[Their words, coming soon.]"

Paulina Sterpe
Paulina Sterpe "Spicy P"
2x American Ninja Warrior Athlete
2022 NNL Worlds Strongest Ninja · Female Division

"[Their words, coming soon.]"

Fight or compete? Get your camp on the record.  Book a call
Partnered with
BFit Performance Training CenterLeominster, MA
Amplify Fitness BostonBoston, MA
Ank FitNewtonville, MA
Origin Fit StudioNatick, MA
Gorilla Crew FitnessTewksbury, MA
FAF GymHolbrook, MA
BJJ BostonMethuen, MA
For gyms and coaches

Professional-grade performance testing, brought to your floor.

This is the same caliber of assessment, analysis, and coaching delivered at the highest levels of sport: pro fight camps, elite performance environments, athletes whose careers ride on the numbers. Defi brings that standard to your facility for a day. Your members test at partner pricing, you share in every assessment, and your gym offers something almost nobody else can.

Coaches: your athletes get tested, you get every report with their consent, and their monthly recap goes out signed from your corner, with your name.

Book a 15-minute call
The Record

The test tells you where you are. The Record shows you where you're going.

One test is a snapshot. The Record is the story: your numbers, your plan, your daily readiness, your streak, and a monthly recap written from your own data, signed by your coach. Free for members of partner gyms, and it gets sharper the day you test.

See The Record
Daily check-in🔥 7-day streak
82
Readiness 82. Green light, go get a good one.
Next missionZone 2 · 35 min
For the RecordRound 3 is in →
Chris, founder of Defi Performance
The founder
"I've run this testing for years in high-pressure environments. And I kept seeing the same gap: the average athlete doesn't have access to their own body's data, let alone the analysis of it. Defi exists to open that gate. People don't come to us for results. We bring results to people: the lab, the analysis, and the coaching, delivered where you train, with every number on the record."

And when the work calls for more than a test, we train: private performance coaching for athletes, and for anyone ready to perform at their highest level.

Chris · Founder, Defi Performance
Performance Coach · Sports Science Specialist · Sports Data Analyst
On the record

What people say, on the record.

"[Testimonial about training, testing, or working with Chris, in their own words.]"

[First name L.] · Fighter, Lightweight

"[Testimonial.]"

[First name L.] · Coaching client

"[Testimonial.]"

[First name L.] · Tested athlete

Individual results vary.

FAQ

The questions everyone asks.

Is this a medical test?

No. This is fitness and performance assessment, not medical diagnosis or treatment. You'll complete a health screening before testing, and anything that needs medical eyes gets referred to medical professionals.

Do I need to be in shape first?

No. The most useful test is the one that shows your real starting point. Protocols scale to you.

How do I prepare?

No hard training the day before, no caffeine for 4 hours prior, no big meal within 3 hours, arrive 10 minutes early. Full instructions come with your booking confirmation.

What do I get afterward?

A clear takeaway before you leave, your complete report within 48 hours, your measured training zones, and access to The Record.

Do you offer training, or just testing?

Both. Alongside the four assessments, Defi offers private performance coaching for athletes and for anyone ready to perform at their highest level. It starts with a call.

When should I retest?

About every 12 weeks for most people; fight camps run their own cadence. The retest is where the work shows up as a measured number.

Know your real numbers.

Four assessments. A measured starting point. A record that follows you.

Book a call