Applied Human Performance

Applied Human Performance

Praxis brings metabolism, nutrition, training, and your underlying health into one connected system — and turns it into measurable performance.

Apply to Work With Praxis Explore the Method
The Systems Map thresholds → zones fuel ↔ availability priority nutrients status gates load ALLOSTATIC LEDGER the shared state one finite account TRAINING writes load METABOLISM energy-system readout NUTRITION energy availability LONGEVITY biomarker constellation

Most health and performance systems fail at the point of application. Praxis bridges the gap between insight and execution.

Performance is not built through isolated protocols. It emerges from the alignment and refinement of interconnected systems over time.

Who Praxis Is Built For

Two ends of the same curve.

Most programs are built for the middle — the population average. Praxis is built for the edges, where that average stops being useful and the answer has to be found one person at a time.

The population average where standard programs are built Return to capacity The standard path failed Optimization Already near the ceiling
The left tail

A return to capacity

You've done the work and followed the advice, but it hasn't added up — the injury keeps coming back, or your labs read "normal" while you feel anything but. You're looking for a genuine return to health, with performance as the horizon beyond it.

The right tail

The pursuit of exceptional

You're already operating near your ceiling and chasing the marginal gains that only a precise, individualized approach can find — or you simply hold yourself to being the best, and want the system that gets you there.

They look like opposites. They need the same thing — a method that doesn't stop at the average, because at the edges the real limiter usually hides between the disciplines, not inside any one of them.

The Systems Map

Five pillars. One shared account.

Your body keeps a single running balance of stress and recovery — the ledger. Four measurement pillars interlock and read from it; Fundamentals is the base they all turn on. Nothing moves in isolation. Select a pillar to see what it contributes and where it meets the others.

Systems Map
The Method

A structured progression from understanding to refinement.

Every engagement moves through five deliberate stages — each building the conditions for the next.

Metabolism

It starts with a single breathing test.

A simple, non-invasive test shows exactly how your body produces and uses energy — your stamina, your fat-vs-carb fuel mix, and the calories you burn at rest. Everything else is built on what it reveals.

Sample Readout · VO₂ ProfilePraxis Diagnostic
VO₂ Max52.4ml/kg/min
Ventilatory Threshold81% max HR
Resting Metabolic Rate1,612kcal/day
PoorAverageOptimalElite
Sample Readout · Functional MarkersPraxis Diagnostic
Vitamin D (25-OH)52ng/mL
Magnesium (RBC)4.6mg/dL
Homocysteine16µmol/L
PoorAverageOptimalElite
Longevity

Then we read the terrain beneath it.

Bloodwork and the gut–mitochondrial picture reveal what's actually driving how you feel and recover — read against the range where the body runs best, not just the range that avoids disease. This is what sets your ceiling.

Nutrition

Targets built from both.

Your calorie and macronutrient targets come straight from the metabolic test, and what to prioritize comes from the bloodwork — enough to fuel real performance, structured so you can hold to it for the long run rather than a few hard weeks.

Sample Readout · Daily TargetsPraxis Diagnostic
Energy Target2,640kcal/day
Protein185g/day
Carbohydrate310g/day
PoorAverageOptimalElite
Sample Readout · Joint CapacityPraxis Diagnostic
Hip Flexion (AROM)115°of 125° PROM
Shoulder Flexion (AROM)140°of 170° PROM
Active Control Index0.88ratio
PoorAverageOptimalElite
Training

Then a program shaped to your body.

Before loading anything, we assess each joint — how much range you actively control versus what it allows. That assessment shapes a program that's powerful and durable, applying stress exactly where you can absorb it and grow.

Fundamentals

And the foundation it all turns on.

None of it works without the basics underneath — your sleep, your stress, the habits you can actually keep. This is the daily practice the whole plan is built on, and where lasting change is really made.

Sample Readout · Daily InputsPraxis Diagnostic
Sleep Consistency7.8hrs avg
Recovery (HRV trend)+12% vs base
Habit Adherence86% this week
PoorAverageOptimalElite

Work is selective and built around measurable progression.

Praxis takes on a limited number of clients to protect depth of care. Begin with an application and an initial discovery call.

Apply to Work With Praxis
The Method

Performance is the expression of how systems interact over time.

Praxis is not a program. It is a structured operating method — a repeatable sequence for understanding a system, creating the conditions for change, and refining performance against measurable markers.

The principles stay fixed. The plan flexes to fit you.

A strong spine, flexible edges: the science underneath doesn't change, but how it's applied is rebuilt around your body, your goals, and your life — and refined as you progress.

Five Stages

A deliberate sequence — each stage building the conditions for the next.

01

Orient

Understand the system

We map your current physiology, history, constraints, and goals — establishing an honest baseline before any intervention. Diagnostics and the performance timeline interview anchor this stage.

02

Stabilize

Create the conditions for change

Before optimization, the system must be stable. We resolve the limiting constraints — sleep, recovery, foundational nutrition — that otherwise blunt every downstream effort.

03

Apply

Implement strategy

Strategy is implemented with precision and sequencing. Training, nutrition, and recovery are deployed as a coordinated system rather than competing protocols.

04

Express

Realize measurable performance

Adaptation becomes output. Progress is verified against objective markers — VO₂, thresholds, body composition, and the metrics that matter to your goals.

05

Refine

Continuously optimize

Reassessment feeds the next cycle. The system is re-mapped, constraints are updated, and the strategy is refined — performance compounds over time.

What We Measure

Four readings. One process that ties them together.

Each area is read in relation to the others, never in isolation — and the daily process that acts on them all is the fifth piece. See how they connect on the interactive Systems Map.

01

Metabolism

How your body produces and uses energy — stamina, thresholds, and fuel mix, measured directly by a breathing test.

02

Nutrition

The fuel and building blocks adaptation is paid for in — energy availability matched to what your testing shows.

03

Training

Strength and conditioning built on capable joints — the stress that drives change, applied with precision.

04

Longevity

The underlying terrain — your bloodwork and the gut–mitochondrial picture that set the ceiling on everything else.

05

Fundamentals

The daily process — sleep, stress, and the habits you control — where the whole plan is put into practice and tracked.

See the Systems Map Explore the Pillars
THE DUAL-SYSTEM VIEW From where you are to where you’re going POINT A where you are POINT B capability horizon stage stage progressed in short cycles — the next shaped by the last THE MEASURED READ capacity · terrain · biomarker constellation THE ENACTED WORK areté · lead measures · consistency
The Dual-System View

Where you are, and where you're going.

Your Performance Profile holds two views at once. The trajectory tracks your path from where you are today — Point A — toward your target, Point B, through the stages of the method. The relationships show how your systems are interacting right now, surfacing the constraint that's limiting you at this moment. Progress and diagnosis, side by side.

Begin with an orientation.

Every engagement starts by understanding your system. Apply to begin with a discovery call.

Apply to Work With Praxis
Performance Diagnostic

We don't begin with a plan. We begin with a complete picture.

The Praxis diagnostic is a structured assessment of how your systems currently operate — physiologically, behaviorally, and contextually. It is the foundation every strategy is built on.

Two Instruments

The Performance Timeline & the Systems Map.

The Performance Timeline Interview reconstructs your history — training, injury, stress, and adaptation — to reveal the patterns shaping where you are today. The Systems Map then translates that picture into a live model of your primary and secondary constraints.

Clinician reviewing performance data at a workstation
Clinician reviewing performance dataPraxis
Intake & Assessment Flow

An eight-step pathway from first contact to refinement.

Each step is sequenced intentionally — every input sharpens the next decision.

01

Initial Discovery Call

A conversation to understand your goals, history, and whether Praxis is the right fit.

02

Digital Intake Form

A structured questionnaire capturing health history, training background, and lifestyle inputs.

03

Performance Timeline Interview

A guided reconstruction of your trajectory to surface patterns, adaptations, and inflection points.

04

Metabolic Testing

Breath-based analysis establishing your aerobic capacity, thresholds, and fuel utilization.

05

Systems Mapping

Your data is rendered into a model of interacting systems, with constraints made explicit.

06

Strategy Design

A coordinated strategy is built — training, nutrition, recovery, and behavior, sequenced as one system.

07

Implementation

The strategy is deployed with ongoing guidance, adjustment, and accountability.

08

Reassessment & Refinement

Markers are re-tested, the systems map is updated, and the next cycle is refined.

The picture comes first.

Begin the diagnostic with an application and a discovery call.

Apply to Work With Praxis
Pillar 01 · Metabolism

The data layer. Measured, not assumed.

Every Praxis plan starts with measurement, not guesswork. A simple breathing test shows exactly how your body produces and uses energy — the solid foundation everything else is built on.

Athlete performing a metabolic test wearing the SpiroFit mask
Metabolic testing — SpiroFitPraxis
The Instrument

Clinical-grade metabolic analysis, on-site.

Testing is conducted with the SpiroFit metabolic system — measuring oxygen consumption and carbon dioxide production breath by breath. From a single session we establish a precise, individualized profile of aerobic capacity, thresholds, and fuel utilization.

Breath-by-breath analysisOn-site testingSame-session results
Included Tests

Four measurements that define your performance ceiling.

Sample Readout · Full ProfileSpiroFit · Praxis
VO₂ Max52.4ml/kg/min
Ventilatory Threshold81% max HR
Resting Metabolic Rate1,612kcal/day
Fuel Utilization · RQ0.86VCO₂/VO₂
PoorAverageOptimalElite
01
VO₂ Max Testing
Maximal oxygen uptake — the ceiling of your aerobic capacity and one of the strongest single markers of longevity.
02
Ventilatory Threshold Analysis
The intensity at which metabolism shifts — defining individualized, precise training zones.
03
Resting Metabolic Rate
Baseline daily energy expenditure, anchoring exact nutrition and recovery targets.
04
Fuel Utilization · Respiratory Quotient
Reveals fat-versus-carbohydrate oxidation across intensities — how efficiently you burn each fuel.
Primary Benefits

Data you can act on the same day.

Immediate actionable dataIndividualized training zonesPrecise nutrition guidanceRecovery prioritizationInsight into mitochondrial dysfunctionDirection for follow-up lab testing
From Numbers to a Plan

Your raw test data doesn't stay raw. Every value — how much oxygen you use, the points where your body shifts gears, how many calories you burn at rest, which fuels you favor — is interpreted and translated into clear training zones and precise targets. The result is a plan built on your physiology, not a population average.

How It Connects

Physiology is the input. The other pillars are the response.

The metabolic profile doesn't sit in a folder — it directly shapes nutrition targets, training zones, and the questions we bring to functional medicine.

Feeds → Nutrition Feeds → Training See the full model

Measure first. Then build.

Metabolic testing anchors every Praxis engagement.

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The Approach

Five pillars. One feedback loop.

Praxis brings together metabolism, nutrition, training, and a whole-person health lens — held together by the daily process that puts them into practice. None of them works alone; each one's results become another's starting point, refined continuously into a single plan built around you.

The Integration

The whole person, not a stack of services.

Select an area to see how it feeds the others. Metabolism measures your energy; nutrition supplies the fuel; training applies the load; longevity reads the terrain underneath — all writing to one shared account.

Integrated Model · inputs ⇄ outputs
Five Pillars, One Ledger

Five disciplines, read as one body.

Most practices would hand you five separate specialists. Praxis runs them as a single system — every pillar reading from and writing to the same shared account, so a finding in one is always a decision about the whole. The point isn't the five parts; it's what happens in the seams between them, where the real limiter almost always hides.

TheAllostatic Ledger

That shared account has a name. Your body keeps a single running balance of stress and recovery — what it has spent, and what it can still afford to spend. Every pillar posts to this same ledger: training writes load, nutrition funds it, metabolism and longevity read the balance. Push too far past what the account can cover and the system tips toward overload. Read it well, and you can take someone right up to their ceiling without going over. The five pillars are how we read and write that one balance.

01Measure

Metabolism

A breathing test reveals how your body makes and uses energy — the objective starting point everything else refers back to.

Open →
02Fuel

Nutrition

The substrate and energy budget every adaptation is paid from — set by your measured physiology and goals.

Open →
03Express

Training

Precise, deliberate stress built on capable joints — the perturbation that provokes the body to adapt.

Open →
04Sustain

Longevity

The biochemical terrain beneath performance — the gut and cellular engines that set your ceiling.

Open →
05Practice

Fundamentals

The foundation the other four turn on — sleep, stress, and habits, the daily inputs that move the whole ledger at once.

Open →

The inputs and outputs feed back into one another — creating a truly individualized plan that targets the whole person.

There is no one-size-fits-all model. The programming is specific, precise, and rebuilt for each client around what the data reveals.

One system. Built around you.

Begin with a diagnostic and discovery call.

Apply to Work With Praxis
Pillar 02 · Nutrition

Fuel and signal. Built on data, refined by bloodwork.

Nutrition at Praxis begins where metabolic testing ends. Your measured energy expenditure and fuel utilization set the starting point — then targeted functional bloodwork sharpens it into precise, individualized guidance.

From Measurement to Strategy

Two inputs. One precise target.

Resting metabolic rate and respiratory quotient define how much you need and which fuels you use well. Functional bloodwork panels then reveal what's happening beneath the surface — nutrient status, metabolic markers, and the signals conventional testing often misses.

Targeted Functional Panels

Where indicated, Praxis uses advanced functional bloodwork — including comprehensive metabolomic and nutrient panels — to refine nutrition strategy beyond what metabolic testing alone can show. Recommendations are educational and coordinated with your physician where appropriate.

Plated whole-food meal, salmon and vegetables
Nutrition built from physiologyPraxis
Two Lenses

Clinical or performance — guided by your goal.

The same rigor, pointed in the direction your goal demands.

Clinical Lens

Return to capacity

For clients restoring health and function, nutrition is oriented toward resolving underlying constraints and rebuilding a stable metabolic foundation.

  • Address nutrient insufficiencies surfaced by bloodwork
  • Stabilize energy, digestion, and recovery
  • Rebuild metabolic flexibility
  • Foundation-first, then performance
Performance Lens

The pursuit of exceptional

For clients chasing the top of their field, nutrition is engineered around output — fueling adaptation, body composition, and competitive demands.

  • Targeted macronutrient breakdowns
  • Meal-timing strategies around training
  • Body-composition and power-to-weight goals
  • Fuel utilization matched to training zones
What You Actually Get

Targets drawn from your physiology.

Your calorie and macronutrient targets come straight from your testing and your goals, so they fit you precisely — enough to fuel real performance, structured so you can hold to it for the long run rather than just a few hard weeks. Refined as your bloodwork and progress change.

Targeted calorie & macro targetsSet from your measured physiologyMeal timing around trainingBuilt for performanceSuggested supplementationAdjusted as your bloodwork changes

Praxis provides nutrition coaching and education. Supplements are suggested, not prescribed; Praxis is not a medical provider and coordinates with your physician on anything within their scope.

How It Connects

Built from what the body reveals.

Your targets aren't generic — they come straight from the metabolic test and are refined by what the bloodwork shows. And they set the budget every training adaptation is paid from.

Metabolism sets the targets Longevity flags what to prioritize Fuels → Training

Fuel matched to the system.

Nutrition is built into every Praxis engagement.

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Pillar 03 · Training

Where capacity becomes output.

Strong, capable joints come first. Before chasing heavier lifts or faster times, we make sure your body can handle them — building strength that's powerful and durable. From there, we develop four different physical qualities together, so nothing gets left behind.

Strength training facility with loaded racks
Built on capable jointsPraxis
Foundation First

Joint capacity before load.

Before chasing output, the system has to be able to express force safely. Praxis prioritizes joint capacity, controlled range, and connective-tissue inputs — so the strength you build is usable, durable, and resilient.

Functional Range ConditioningInternal Strength ModelConnective-tissue inputsControlled articular work
How We Assess a Joint

The gap that decides what we load.

Every joint has two ranges: how far it can be moved (passive) and how much of that range you actively control. When the gap between them is large, the joint isn't ready for heavy load — we build control first. When your active range comes close to your passive range, the joint clears, and we can load it hard and safely.

HOW WE ASSESS A JOINT Active range vs passive range — cleared to load? passive range (PROM) — what the joint allows active range (AROM) — what it controls 30° 60° 90° 120° 150° 180° Hip flexion CLEARED Δ 10° AROM 115° · PROM 125° Shoulder flexion DEFICIT Δ 30° — gated AROM 140° · PROM 170° The gate: active range within ~20° of passive — a range the joint controls — clears it to load. A wider gap is a position the joint can reach but cannot yet own; loading across it waits.

It's a gradient, not a switch — the well-functioning parts of a joint can be trained even while the rest is still being built, so you keep progressing throughout.

The Trainable Qualities

We build the whole machine — not just the engine.

Most training builds the engine and ignores the frame and transmission that have to carry it. We develop every quality together, and from both directions at once: bottom-up through the biology — tissue, structure, capacity — and top-down through the neurology — drive, timing, rate of force. The result is someone who's powerful and durable, who can express their peak and do it reliably. Select a quality to see how it connects.

Bottom-Up · Biological
Top-Down · Neurological
How It Fits Together

The qualities relate as an ecology.

These capacities aren't trained in separate silos — they form a living system. Each one leaves a different "residual" — how long its effect lasts — and that's what sets how often it should be trained. The heaviest, most neural work is done in small doses; the tissue-based work tolerates far more frequency. Balancing them is how training stays productive instead of accumulating fatigue.

THE TRAINING ECOLOGY Qualities relate as a system — residual sets frequency NEURAL · top-down CNS-costly · ~20% of weekly volume BIOLOGICAL · bottom-up tissue · ~80% of volume Absolute strength Maximal force · the neural “one knock” residual ~30 d stimulate /wk Speed strength Rate of force · power at optimal velocity residual ~5 d stimulate /wk Reactive strength Fast SSC · connective-tissue mediated refractory ~6 h daily+ Connective tissue Length + load along the isometric continuum 2 : 1 static : dynamic high-frequency tolerant JOINT CAPACITY measured (FRA) · the foundational quality the others load behind the gate An ecology, not a checklist — the joint gates what loads; each quality's residual sets its frequency; all run concurrently.
How It Connects

Loaded with intent, gated by capacity.

How hard we load isn't guesswork. Metabolism's measured thresholds set your training zones, and Longevity's read of your recovery capacity sets the load you can actually sustain.

Thresholds ← Metabolism Recovery capacity ← Longevity Demands → Nutrition

Train the whole system.

Programming is built around your physiology and goals — never a template.

Apply to Work With Praxis
Pillar 04 · Longevity

Performance that lasts.

Longevity is about building a body that performs now and keeps performing for decades. To do that, we look deeper than most testing goes — at the underlying systems that quietly decide how well you feel, recover, and adapt. This whole-person view is what functional medicine brings to the table.

Beyond "Normal"

"Normal" isn't the same as optimal.

Standard lab results tell you whether you're sick. They're built to catch disease — so "normal" just means "not currently ill." We ask a more useful question: how well is each system actually working, and what's holding it back? That gap — between not being sick and truly thriving — is where the real gains live.

Active older athlete outdoors
A healthier baseline, sustainedPraxis
How We Read Your Labs

The same result, read more closely.

A standard lab flags a value only when it falls outside a wide "normal" band — a range built to catch disease, not to define thriving. We read your results against a tighter functional range: where a marker sits when the system is genuinely working well. A value can land comfortably inside "normal" and still be telling us something useful.

HOW WE READ A VALUE The functional range lives inside the reference range conventional reference range functional / optimal target Vitamin D (25-OH) 52 ng/mL reference 30–100 · functional 40–60 · in optimal band Magnesium (RBC) 4.6 mg/dL reference 4.2–6.8 · functional 5.2–6.5 · in range, below optimal Homocysteine 16 µmol/L reference <15 · functional <10 · outside reference Inside the lab's reference range is not the same as inside the range where the body runs best. WHERE WE LOOK FIRST Gut & mitochondria Calprotectin (barrier) ▲ high n-Butyrate (SCFA) ▼ low Oxidative stress burden ▲ high PATTERN Barrier stress + low SCFA; oxidative load SUPPORT Butyrate & barrier substrate; train oxidative capacity — not antioxidant flooding

Illustrative example. Functional ranges guide where we look and what we suggest; they inform coaching and education, and we coordinate with your physician on anything within their scope.

Where We Look First

Two systems that shape almost everything.

When we look beneath the surface, two areas tend to drive how you feel and perform more than any others. They're where Longevity work usually begins.

The Gut

Where it all gets processed

Your gut decides how well you absorb the fuel and nutrients you take in — and it has a surprising say in your immune system, inflammation, and even mood. When it's not working well, everything downstream suffers, no matter how clean the diet looks on paper.

  • How well you actually absorb nutrients
  • Inflammation and immune balance
  • The foundation good nutrition depends on
The Mitochondria

Your cellular engines

Inside every cell, tiny engines called mitochondria turn food and oxygen into usable energy. How well they run sets your ceiling for stamina, recovery, and how energetic you feel day to day. Supporting them is some of the highest-leverage work we do.

  • The source of your real, day-to-day energy
  • Recovery capacity and resilience
  • A key lever for healthy aging
How We Organize It

Connecting the dots — and the timeline.

Two proven functional-medicine tools help us turn scattered findings into one clear picture of you.

The Map

How your systems connect

Instead of treating symptoms one at a time, we map how your body's systems influence each other — so a problem showing up in one place can be traced back to its real source somewhere else.

  • Looks for root causes, not just symptoms
  • Sees the body as connected systems
  • Mirrors the Praxis Systems Map
The Timeline

How you got here

We walk back through your health history — the events, stressors, and turning points — to understand how you arrived at today. Knowing the story is what lets us fix causes instead of chasing effects.

  • Traces where today's issues began
  • Pairs with your performance history
  • Shapes the order we tackle things in
A Note on Scope

Praxis provides performance coaching and education informed by functional-medicine principles. It is not a substitute for medical care or diagnosis. Where clinical needs arise, we coordinate with your physician or medical team — we work alongside them, never in place of them.

How It Connects

The terrain everything else is built on.

What we find here shapes the whole plan — the nutrients Nutrition prioritizes, the load Training can sustain, and how flexibly Metabolism can burn fuel. The deepest read informs every other pillar.

Priority nutrients → Nutrition Sets sustainable load → Training Shapes flexibility → Metabolism

See the whole person.

Every Praxis strategy is built through this lens.

Apply to Work With Praxis
Pillar 05 · Fundamentals

Where the plan becomes practice.

Everything measured has to be lived. Fundamentals is the daily process at the center of Praxis — the habits, sleep, and stress you actually control, turned into a clear plan and tracked over time. It's where the science becomes an art, and where lasting change is actually made.

The Idea Beneath Praxis

Praxis Potentiae Humanae.

The name isn't decoration — it's the whole philosophy in three words: the practice of human potential. It traces an old and well-worn path, from what you could become to a life genuinely lived well.

POTENTIA latent capacity who you could become PRAXIS theory enacted the work, lived daily ARETÉ excellence character in action EUDAIMONIA flourishing a life going well Closing the gap between the actual self and the potential self. hover to trace the path

Put plainly: you hold more capacity than you're currently expressing. The way you reach it isn't willpower or wishful thinking — it's practice, the steady enactment of good habits until they become excellence, and excellence, over time, into a life that's genuinely flourishing. That's the work this pillar does.

Lead vs Lag

The part you can act on every day.

Your test results — metabolism, bloodwork, strength — are outcomes. They tell you how it's going, but you can't change them directly. What you can change is the daily inputs: how you sleep, how you manage stress, whether the habits get done. Fundamentals tracks those inputs, because they're the levers that actually move everything else.

The coach holds the theory — you live the practice

Our role is to hold the science and the strategy. Yours is to live it, day to day. Together, that's exactly what the word praxis means — and it's where real results come from. The aim over time is to hand more and more of it to you: from expert-led to self-mastery.

Person stretching by the sea at sunrise
The daily practicePraxis
What We Track

The inputs that quietly decide everything.

These aren't extras layered on top of training — they're the foundation it stands on. Sleep and stress feed into the same balance of recovery and load as every hard session.

Sleep quality & consistencyStress & recoveryDaily habits & adherenceReadiness day to dayBehavior change that sticksThe action plan, tracked
How Change Actually Happens

Built on how people really change — not willpower.

Lasting change doesn't come from trying harder. It comes from working with your character and building small, repeatable habits. Praxis draws on proven approaches to make the plan something you can actually sustain.

Your Strengths

Built around who you are

We start from your character strengths — the things you're naturally good at — and build the plan to run on them, rather than fighting against your grain.

  • Identify your signature strengths
  • Design habits that fit them
  • Excellence expressed as your own
Small Habits

Tiny, repeatable, lasting

Big resolutions fail; small habits compound. We make each step small enough to be easy, then let consistency do the heavy lifting over time.

  • Start smaller than feels necessary
  • Anchor new habits to existing ones
  • Consistency over intensity
How It Connects

The base the other four turn on.

Fundamentals isn't a separate pillar off to the side — it's the foundation beneath all of them. Change your sleep, your stress, or your habits, and Metabolism, Nutrition, Training, and Longevity all move with it.

Moves → Metabolism Moves → Training See the full model

Theory, made practice.

Fundamentals is the through-line of every Praxis engagement.

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Metabolic Testing

Stop guessing. Measure.

A single non-invasive breathing test replaces years of assumptions — showing exactly how your body produces and uses energy. It's the objective foundation every Praxis plan is built on, and it's available as a standalone assessment.

Book a Test What's measured
The Menu

Three ways to measure.

Resting Metabolic Rate$150

How many calories your body burns at complete rest — the true baseline for any nutrition target. The single most useful number for body-composition and fueling decisions.

  • Resting energy expenditure (calories/day)
  • Fuel mix at rest (fat vs. carbohydrate)
  • Metabolic efficiency baseline
  • ~30 minutes, non-invasive
Book RMR
VO2max$250

Your aerobic ceiling and the exact heart-rate zones where your body shifts gears — the data that makes conditioning precise instead of guessed. The gold standard of cardiorespiratory fitness.

  • VO2max (aerobic capacity)
  • Ventilatory thresholds (VT1 / VT2)
  • Personalized heart-rate training zones
  • Fuel utilization across intensities
Book VO2max
How It Works

Simple to do. Impossible to fake.

You breathe through a lightweight mask while the system measures the oxygen you consume and the carbon dioxide you produce. For RMR, you simply rest. For VO2max, the effort builds gradually on a bike or treadmill until we've mapped your full range. There's nothing to prepare for and nothing to study — the numbers are what they are, and that's the point.

Non-invasiveNo needlesResults same dayIndividual coaching included
Athlete performing a metabolic test wearing the SpiroFit mask
The SpiroFit assessmentPraxis
Ready when you are

Put a number on it.

Book a standalone metabolic test, or start with a full application if you're considering the complete Praxis system.

Book a Test See the Full System
Work With Praxis

A small number of clients. An exceptional depth of care.

Praxis is a high-touch, fully integrated engagement for people at the edges of the performance distribution — whether returning to capacity or pursuing the exceptional. We deliberately limit capacity so that every system receives genuine attention over time.

The Engagement

One integrated system, not a stack of services.

Most providers hand you a plan and step back. Praxis stays in the loop — diagnosing, designing, implementing, and refining alongside you. Training, nutrition, recovery, and cognition are coordinated as a single performance system and tracked against objective markers.

Photo — athlete training, calm premium environmentUnsplash: "performance training studio"
What's Included

The complete Praxis system.

Full Performance Diagnostic

Discovery call, digital intake, performance timeline interview, and systems mapping.

On-Site Metabolic Testing

VO₂ max, ventilatory threshold, RMR, and fuel utilization via the SpiroFit system.

Integrated Strategy Design

A coordinated training, nutrition, recovery, and behavioral strategy — sequenced, not stacked.

Ongoing Implementation

Direct guidance, adjustment, and accountability throughout each cycle.

Continuous Reassessment

Scheduled re-testing and systems re-mapping so the strategy refines over time.

Medical Partner Coordination

Where appropriate, coordination with your concierge or functional medical team.

We bring the science. You bring the life it has to fit into.

That partnership is the whole point — the name Praxis means turning theory into practice. We hold the expertise; you live the day-to-day. Together, that's where real, lasting results come from. Pricing and availability are discussed during your first call.

Capacity is intentionally limited.

If you're ready for a fully integrated approach to performance and longevity, begin with an application.

Apply to Work With Praxis
About

A structured operating system for human performance.

Praxis is a high-end applied human performance practice integrating metabolism, nutrition, training, and a whole-person health lens into one structured, individualized system.

Core Philosophy

Performance is not built through isolated protocols.

It emerges from the alignment and refinement of interconnected systems. Praxis exists to close the gap between insight and execution — turning what the science says into what is actually done, consistently, over time.

MinimalRefinedStructuredPerformance-forwardSystems-basedPremium but restrained
Chris King in the field
Chris King, founderPraxis
Strategic Partnerships

Built to extend concierge and functional medicine.

Praxis partners with medical practices serving discerning patient populations — adding implementation and performance optimization to their diagnostic and lab capabilities.

Praxis Provides

Implementation, performance optimization, metabolic testing, and a structured pathway from data to results.

Medical Partners Provide

Diagnostics, lab testing, and clinical oversight within their scope of care.

Patients Receive

A more complete, actionable, and coordinated care pathway across both teams.

Praxis should feel like a structured operating system for human performance — not a traditional coaching brand.

Clarity, refinement, trust, and measurable progression — in everything we build.

Apply

Begin with an application.

Because capacity is limited, every engagement begins with a short application and a discovery call. Tell us where you are and what you're working toward.

Submitting opens your email app with the details ready to send to Praxis.

FAQ

Questions, answered.

A few of the things prospective clients most often ask. Anything else can be covered on a discovery call.

What exactly is Praxis?+
Praxis is a high-end applied human performance practice. We bring together metabolic testing, nutrition, training, and a whole-person health lens into one structured system, then implement and refine it with you over time — closing the gap between insight and execution.
Who is Praxis for?+
Discerning individuals who want a fully integrated, measurement-driven approach to performance and longevity — and who value depth of care over a generic program. Many clients come through concierge or functional medical partners.
What does metabolic testing involve?+
Breath-based analysis using the SpiroFit system, measuring oxygen consumption and CO₂ production. From a single session we establish VO₂ max, ventilatory threshold, resting metabolic rate, and fuel utilization — then translate the data directly into your strategy.
How long is an engagement?+
Praxis is built around long-term, compounding progression rather than short fixes. Engagements run in reassessment cycles; specifics are discussed on the discovery call based on your goals.
Do you work alongside my doctor?+
Yes. Where appropriate, we coordinate with your concierge or functional medical team — they provide diagnostics and clinical oversight; Praxis provides implementation and performance optimization.
How do I start?+
Submit a short application. If it's a fit, we'll schedule a discovery call to discuss your goals, the process, availability, and investment.
Apply to Work With Praxis