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Physiological Performance Analysis Software

A complete picture of an athlete's physiology

To create physiology based training programs, understand performance and monitor adaptations. Purpose-built for lab, field, and even remote testing.

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Trusted by the best in sport, and far beyond it

From Olympic federations and WorldTour teams to remote coaches, HYROX studios, longevity clinics and human performance labs worldwide.

  • Alpecin–Premier TechAlpecin–Premier Tech
  • USA TriathlonUSA Triathlon
  • Belgian Cycling FederationBelgian Cycling Federation
  • German Swimming FederationGerman Swimming Federation
  • Swim IrelandSwim Ireland
  • CANYON//SRAMCANYON//SRAM
  • German Triathlon FederationGerman Triathlon Federation
  • University of ArizonaUniversity of Arizona
  • Team Bardiani CSFTeam Bardiani CSF
  • Swedish AquaticsSwedish Aquatics
  • German Skiing FederationGerman Skiing Federation
  • INSEP FranceINSEP France
  • Korea University College of MedicineKorea University College of Medicine
  • Roojai Insurance Cycling TeamRoojai Insurance Cycling Team
  • Belgian Royal Speed Skating FederationBelgian Royal Speed Skating Federation
  • Singapore Swimming AssociationSingapore Swimming Association
  • Luxembourg Athletics FederationLuxembourg Athletics Federation
  • Team IKOTeam IKO
  • UC Santa BarbaraUC Santa Barbara
  • Finnish Sports Lab JyväskyläFinnish Sports Lab Jyväskylä
  • Luxembourg Institute for High Performance SportsLuxembourg Institute for High Performance Sports
480+Human performance labs
2,600+Remote coaches
140+HYROX studios
90+Longevity clinics

Everything conventional testing gives you. And everything it can’t

INSCYD turns any test protocol into a complete metabolic profile, at gold-standard accuracy.

What you measureConventional Lactate ProfileConventionalINSCYD powered Lactate testComplete profile
Thresholds
Yesaccuracy test protocol dependent
Yesscientifically proven highest available accuracy, protocol independent(1)(2)
VO₂max
No
Yesproven metabolic cart level accuracy(3)(2)
VLamax
No
Yesgold-standard reliability(4)(5)
Fat & Carbohydrate Combustion rates
No
Yesno metabolic-cart required(6)(5)
Lactate clearance & accumulation rates
No
Yesfor use in interval training & pacing
Standard training zonesas % of threshold
Yes
Yes
Physiology based training zonesbased on %VO₂max, FatMax, energy distribution
No
Yes
Typical Test Duration25 min25 min
Lactate samples6 to 108 to 12

Swipe the table to see the full INSCYD column

The blind spot

Your current performance assessment doesn’t provide all the important metrics

The complete picture

With INSCYD, you see every metric that matters, in one place

Switch between the athlete Setcard and the full physiological characteristics.

Any test, any protocol

Use performance testing data from any assessment

From comprehensive lab tests, to simple field lactate to critical power test to just measuring distance and time.

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The complete athlete profile ›

One Test. One Dashboard. All metrics. All in One Place

Body composition, metabolic fingerprint, training zones and every performance metric that matters. One assessment, the full physiological picture.

Training zones ›

Physiology-based training zones

Female Testfemale
Test ID#88746
DateJul 2, 2026
TypeLACTATE
SportCycling
ZoneTargetPhysiological Conditions
FatMaxPower207[watt]Lactate con.1.4[mmol/l]Fat47[g/h]Carbohydrates82[g/h]AT63[%]
3min @ 90% VO₂maxPower500[watt]VO₂max87[%]AT153[%]aerobic76.8[%]anaerobic23.2[%]
800m - lactate 8Pace03:06[min:sec/km]VO₂max86[%]VLamax13[%]aerobic79.2[%]anaerobic20.8[%]
30" Sprint -50% anaerobicPace02:44[min:sec/km]VLamax25[%]Lactate acc. rate6.3[mmol/l/min]aerobic50[%]anaerobic50[%]

Peer-reviewed validation ›

Gold-standard accuracy – independent of your test protocol

Validity of the calculated VO₂max from cycling power and VLamax
INSCYD maximal lactate steady state validation
Load intensity determination in triathlon
Physiological predictors of triathlon performance
Simulated metabolic responses to HIT
MLSS and VO₂max determination utility

White-label PDF reports ›

Automated generation of branded reports

The INSCYD model ›

A holistic model of physiology

Performance is created by the interaction of different physiological systems. Changing one has trickle-down effects.

VO₂max
FatMax
VLamax
MLSS
INSCYD

Performance projection ›

First know what to train for – then start training

fatcarbFatMax zonelactate production
How it works

From a single test to a full metabolic profile, in 3 simple steps

INSCYD fits seamlessly into your workflow, whether you test in the lab, in the field or remotely.

1Step 1of 3

Collect your data

Use the protocol and equipment you already have, a lactate meter, power meter, treadmill, ergometer, VO₂ analyzer or a stopwatch. No new gear to buy.

2Step 2of 3

Upload to INSCYD

Securely upload your test results to INSCYD’s cloud platform. Within seconds, INSCYD analyzes the data and reconstructs the full metabolic profile.

3Step 3of 3

Get the full metabolic profile

Receive a complete physiological profile of your athlete, VO₂max, VLamax, FatMax and more, ready to share as a custom-branded report.

1. Collect2. Upload3. Profile
Pick your role

Built for everyone who needs to understand athletic performance

From small coaching businesses to human performance labs to elite sports.

Testimonials

What the best in sport say about INSCYD

From Grand Tour winners and Olympic federations to remote coaching businesses, HYROX studios and human performance labs.

“Thanks to INSCYD, my trainer and I always know where I currently stand and where I can improve my performance.”
Wout van Aert
Wout van AertTeam Jumbo-Visma
“The INSCYD test opened my mind to an entirely new world of training and racing.”
Lionel Sanders
Lionel SandersProfessional IRONMAN athlete
“While everyone is obsessed with power data, INSCYD enables me to go beyond the superficial and understand my body better.”
Eli Iserbyt
Eli IserbytCyclocross professional
“INSCYD testing helps my coaches to create the best training programs for us.”
Primož Roglič
Primož RogličTeam Jumbo-Visma
“With the INSCYD information it is much easier to target the specific training goal.”
Ragnar Gudmundsson
Ragnar GudmundssonOptimizaR Sportstestcenter
“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 and know that we’re looking at the same data 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
“Using INSCYD PPD, I could clearly see his strengths and limitations.”
Mark Turnbull
Mark TurnbullSparks Into Life
“INSCYD gives a full spectrum of metrics every coach needs to have.”
Filip François
Filip FrançoisOlympic mountainbike coach & co-founder, Built By Hard Work
“INSCYD enables us to take real-world data from testing and training. This saves us time and effort, and refines the quality of our job.”
Patxi Vila
Patxi VilaHead of Performance, Movistar Team
“I am convinced by the effectiveness of INSCYD to improve performance. It has proven to be a very powerful tool for us.”
Dr. Philippe Hellard
Dr. Philippe HellardHead of Research, French Swimming Federation
“INSCYD enables us to precisely capture key performance metrics of the energy metabolism of our swimmers.”
Dr. Alexander Törpel
Dr. Alexander TörpelHead of Diagnostics, German Swimming Federation
“After starting with INSCYD, it was like a snowball effect. We went from 20 runners winning about 30 medals to 160 medals with 23 champions in one year.”
Ben Tilus
Ben TilusXLR8 Performance Lab
“It’s one of the most innovative things in sport science that I’ve found in recent years. If you’re not on the forefront of technology and exercise science, you’re going to get left behind.”
Parker Spencer
Parker SpencerHead Coach, USA Triathlon Project Podium
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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