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INSCYD for human performance labs

Maximize the capabilities of your lab

Stop piecing together data from multiple tests. Instead, use a single test protocol to generate more, higher-quality data with less effort than today.

Generate a cohesive picture of an athlete’s physiology including VO₂max, VLamax (glycolytic capacity), economy, substrate utilization, thresholds and training zones from a single test protocol lasting less than 30min. Process the data from all your equipment in no time to automatically create reports at the click of a button.

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Sports scientist reading live gas-exchange data while a cyclist rides a ramp test wearing a VO2 mask in a human 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.

More Data = More TestsMore Data = One Test

Until now, adding more data for a more complete assessment meant spending more time in the lab. A true VO₂max ramp test required a separate test. Measuring VLamax required an additional sprint test. The cost of data generation scaled 1:1 with the quantity and quality of the results. Until now.

Now you can get all the data from a single test lasting 30 minutes or less: a valid VO₂max and VLamax, as well as all submaximal values, including thresholds, fat and carbohydrate utilization, and even running economy.

Four protocols, four sessions
  • Spirometry, gas exchangeVO₂maxMetabolic cart and mask
  • Sprint or Wingate testVLamaxAll-out effort, separate session
  • Lactate step testThresholdsLactate analyzer
  • Indirect calorimetryFat and carb ratesGas exchange again
becomes
One protocol, one session
Lactate step test

A complete picture of the athlete’s physiology

One cohesive picture of an athlete’s physiology

All physiological systems are interconnected. We know this, but traditional testing doesn’t reflect it. Now you can see one cohesive picture of an athlete’s physiology. Want to know how better running economy shifts the lactate profile? No problem. How does a higher VO₂max affect fat oxidation? Now it’s visible.

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[%]

A lactate profile doesn’t provide 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.

A proven metric, but an outdated concept

Traditional lactate profile testing was developed decades ago to identify thresholds and create training zones. Today, athletes can determine their thresholds and standard training zones with sufficient accuracy using DIY solutions such as FTP testing. At the same time, the science of lactate has advanced substantially, identifying lactate as a central molecule in metabolism. When used correctly, lactate testing unlocks a whole new world of performance assessment.

A shift in the lactate curve does not indicate improved performance

Lactate concentration is influenced not only by speed or power but also by lactate production, lactate clearance, body composition, and economy. This means that a shift of the lactate curve to the left or right cannot be clearly attributed to a single cause, such as increased aerobic or endurance capacity. There may be several underlying reasons, and the effects of different influencing factors can cancel each other out.

Give clients a reason to come back

Want to find out whether raising VO₂max, lowering VLamax, or reducing body fat would be most beneficial for achieving 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 affect performance. This strengthens athlete motivation and creates a compelling reason to return for retesting, turning physiological testing into a customer-retention system.

Performance projectionLive
current testprojectionfatcarbohydrateFatMax zonelactate recoverylactate accumulation

Solid line, the test you ran. Dashed line, the athlete you are training towards. Drag any slider.

Customized reporting that scales

Generate fully automated, branded, and customizable reports within seconds. Using the same lactate profile test you already run, you can create different report levels and service tiers without any additional testing time or cost. This enables higher-value testing tiers without added costs, increasing your profit margin.

Revenue scales, time and effort don’t

Adding metrics like running economy and VLamax to your test results enables you to charge more for your services.

You can offer different service tiers, from a basic test offering with limited data insights to a complete 360° picture of the athlete’s physiology. Because all tiers are based on the same short test, you can upsell clients to a higher tier during the post-testing consultation. More revenue, with the same labor time, hardware, and consumables.

Coach reviewing his testing revenue on a tablet
＋Metabolic test1 athlete+€149
＋Test block6 athletes+€780
＋Re-testafter 12 weeks+€129
＋Coaching + testingmonthly plan+€340
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.

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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

Connect with new clients

Grow your lab with INSCYD’s marketing network and reach more than 80,000 athletes every month who are actively looking for INSCYD-certified coaches and labs.

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

Professional marketing support. Use ready-made materials like videos and testimonials to showcase your lab and attract new clients.

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1,900+ providers · 60+ countries in 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.

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