The highest-standard human performance lab just without the cost of one

Turn simple lactate testing into a complete physiological assessment

Generate VO₂max, VLamax, substrate utilization, thresholds and training zones from the same conventional lactate step test you already perform. No additional testing time, sprint tests or extra equipment required. Deliver substantially more physiological insight without increasing time, effort or cost.

Sports scientist taking a blood lactate sample from a cyclist's earlobe in a performance lab
VO₂max
60ml/min/kg
VLamax
0.5mmol/l/s
FatMax
355kcal/h
Fat & carb combustion

Trusted by the performance labs behind the best in sport

From university human-performance labs and national federations to private testing studios and WorldTour team physiologists worldwide.

A lactate profile isn’t providing all relevant performance metrics

A hand-drawn lactate curve on old creased graph paper Threshold concepts · decades old
Lactate profile
4 0 8 watt LT1 LT2 ±0 W at 4 mmol/l
Lactate production
Lactate clearance
Body composition
Economy

Same shift. Four different causes.

INSCYDAnalysing…

A proven metric, but an outdated concept

Traditional lactate profile testing was developed decades ago to find thresholds and create training zones. Today athletes can get their thresholds and standard training zones with sufficient accuracy from DIY solutions like FTP testing. On the other hand: the science about lactate has developed substantially, identifying it as a center molecule of metabolism. Used in the right way, lactate testing unlocks a whole new world of performance assessment.

A shift of the lactate curve might not be improved performance

Lactate concentration is not only influenced by speed or power, but also by lactate production, lactate clearance, body composition, and economy. This means that a simple left/right shift of a lactate curve cannot be clearly attributed to one single cause, like increased aerobic or endurance capacity. The reasons could be manyfold, the effects of different influencers can cancel each other out.

Decipher an athlete’s physiology, from a simple lactate curve

Because the lactate profile is the result of several different physiological systems interacting, INSCYD can use advanced physiological analysis to reverse engineer the complete physiological profile of an athlete.

See the whole physiology of every athlete

One simple lactate test returns VO₂max, VLamax, FatMax, thresholds, fat and carbohydrate combustion rates, lactate clearance and recovery rates and much more. WITHOUT a metabolic cart! In lab or field based testing.

Marco Rossimale Test ID#88214 DateMar 12, 2026 TypeLactate SportTriathlon · Cycling ⇆ Change Test
VO₂max
60.2ml/min/kg
Max. aerobic power
454W
MLSS
281W
LT1
196W
VLamax
0.52mmol/l/s
W′
20.9kJ
FatMax
410kcal/h
MFO
455kcal/h
CarbMax
187g/h
Glycogen
486g
Max. lactate clearance rate
0.68mmol/l/min
Economy
12.8ml/min/W
Fat & carbohydrate combustionfatFatMax zonecarbohydrate
watt
Metabolic fingerprint
VO₂max Threshold FatMax Economy Body comp VLamax
Limiter · VLamax
Lactate: clearance & accumulation ratelactate clearancela-accumulation
watt
Physiology-based training zones
Zone Target Physiological Conditions
FatMax Power207[watt] Lactate con.1.4[mmol/l] Fat47[g/h] Carbohydrates82[g/h] AT63[%]
3min @ 90% VO₂max Power500[watt] VO₂max87[%] AT153[%] aerobic76.8[%] anaerobic23.2[%]
800m - lactate 8 Pace03:06[min:sec/km] VO₂max86[%] VLamax13[%] aerobic79.2[%] anaerobic20.8[%]
30" Sprint -50% anaerobic Pace02:44[min:sec/km] VLamax25[%] Lactate acc. rate6.3[mmol/l/min] aerobic50[%] anaerobic50[%]

Proven gold-standard accuracy

All metrics provided by INSCYD are generated based on the knowledge of peer-reviewed literature. No statistical models, no black-box AI. INSCYD is known as the gold standard for capturing VLamax, even without a sprint test, and independent scientific validation has repeatedly demonstrated its gold-standard accuracy. Its lactate-based VO₂max assessment has been shown to be indistinguishable from spirometry-derived VO₂max in validated protocols.

Hover a study, click to open the paper

Customized reporting that scales

Generate fully automated, branded and customizable reports within seconds. Using the very same lactate profile test you already run, you can now create different report levels, and therefore service tiers, without any additional test time or cost. Higher-value testing tiers become possible with no added cost, driving up your profit margin.

Show athletes what to improve, and why they should come back

Want to find out whether it is more beneficial to raise VO₂max, lower VLamax or drop body fat to break the next PR? INSCYD does this for you and your customer. Based on real physiological test data and athlete goals, it projects how specific physiological improvements will change performance. That creates stronger athlete motivation and a compelling reason to return for retesting, turning your physiological testing into a customer-retention system.

Performance projectionTry the sliders
current testprojection

Move a slider. The lactate profile answers.

More revenue, from the tests you already run

A complete physiological assessment instead of a lactate profile empowers you to charge more for your services. Without increasing labour time, consumables or other cost. Scale without additional investment! See exactly what physiological testing adds to your lab’s revenue.

Scale without additional investment Multiple athletes at the same time Save time on every test
EUR

01 · Higher revenue per test

The same lactate step test you run today, delivered as a full metabolic profile. Same test time, a report worth more.

€

What a conventional lactate step test bills at today, before the profile.

€

Recommended: €250, the price labs charge for a full metabolic profile. That is €130 more per test, on tests you already perform.

02 · Increased repeat testing

A profile gives every athlete a measurable reason to come back. Retesting becomes part of the service, not a favour you ask for.

Recommended: about one retest per athlete a year. Athletes come back for a second or third profile.

€

Recommended: the same as the full profile. A retest is the same depth of report.

What 12 weeks of training changed, measured

VO₂max+4.2ml/min/kgFatMax+38kcal/hVLamax−0.06mmol/l/sPower at 4 mmol/l+17W

03 · Upsell to full profile and follow-up

Clients who arrive for a basic test, see what they are missing, and upgrade. A share of them also want the training that follows.

People who book a single test, with no coaching relationship yet.

%

Recommended: 50%. Once they see what a basic test leaves out, half upgrade, at €130 more each.

%
€

Recommended: at or above your consultation rate. This is the training that follows the report.

Revenue increase with INSCYD
+€33,000net additional revenue a year
165 INSCYD tests a year · licence at €42/test

Why they come back

Test 1 · MarchRetest · June
VO₂max+4.2 ml/min/kg
FatMax+38 kcal/h
VLamax−0.06 mmol/l/s
Power at 4 mmol/l+17 W
Test 1 12 weeks of training Retest
Next retest booked · 8 weeks
Current testing revenue€7,200 Higher revenue per test+€7,740 Repeat testing+€18,675 Upgrades to the full profile+€3,870 Follow-up training plans+€3,600 Additional revenue with INSCYD€33,885 INSCYD licence at €42/test−€6,930 Net additional revenue€26,955 Total testing revenue€34,155

INSCYD licence: €42 per test at your 165 tests a year, from the volume plans for your region.

Take this calculation with you — we will send the full report to your inbox.

For a precise evaluation tailored to your lab, run the numbers with us on a call.

Book a demo

You are never left alone with your data

Learn the science, practise it on real athletes, and get a hand the moment you need one.

01 · Learn it

Build in online education

INSCYD College gives you interactive, on-demand courses and recognized certifications that turn complex sports science into practical knowledge you can apply directly to training.

Learn from scientific advisors to Olympic federations, Olympic coaches, leading scientists, and some of the most successful experts in endurance sports.

Interactive coursesCertificationOn demand
Explore INSCYD College
02 · Do it live

Coaching & Testing Camp

Cause and effect, not opinions. Four days on the physiological mechanisms behind performance, so by day 4 you can profile an athlete and make training and nutrition decisions straight from the data.

WorkshopsMasterclassesMentorship
See the 4-day program
03 · Never get stuck

Support at every step

Guided onboarding tours, video explanations and tooltips inside the app. Expert consultation calls, a help center and an AI chat that finds answers in seconds.

Guided onboardingHelp centerAI chat

Connect with new clients

Unlock opportunities to grow your lab with INSCYD's marketing network, reaching over 100,000 athletes every month.

Gain visibility. Get featured as an INSCYD lab to connect with a global network of athletes seeking top-tier performance insights.

Professional marketing support. Use ready-made materials like videos, images and testimonials to attract clients to your testing services.

Explore the INSCYD Finder

The people already charging for physiology

"The more we can understand how an athlete does what they are capable of doing, the better we can focus on what they need to do to get better. This is why I am happy to partner with INSCYD."

David Tilbury-Davis
David Tilbury-DavisWorld-renowned triathlon coach

"INSCYD improves my ability to provide coaching guidance to athletes all over the world, from a validated protocol."

Ryan Kohler
Ryan KohlerHead Coach & Physiologist, Fast Talk Labs

"With the INSCYD metabolic breakdown data, it is easy to calculate what's possible."

Markus Kinzlbauer
Markus KinzlbauerCoach of the 6-time Race Across America winner
Every metric that matters

One assessment. The complete picture of your athlete’s physiology.

VO₂max, VLamax, FatMax, thresholds, fuel use and training zones, from a single test in the lab, in the field or fully remote.