Illustrative data · 01
Running
Threshold pace and heart rate in one usable result.
LT24:08 /km
For runners, cyclists, triathletes and coachesYour lactate test.
Clearly interpreted.And a real answer to whether your training is working.
LT1210 WAerobic threshold
Demo account · example dataLactateThreshold
LT1210 WLT2258 W
Your zones
Easy179–210 W
Tempo210–234 W
Threshold234–271 W
Turn measured stages into defensible thresholds, useful training zones and progress you can actually act on.
Start free · no credit card · demo without signupYour data stays on our server in Germany, is never sold and is deleted within 30 days of closing your account. PrivacyFrom stages to direction
One test. One clear training decision.
Running, cycling or triathlon: you run the test, you see every number behind the result, and you decide what changes in your training.
Illustrative data · 02
Cycling
Power, lactate and training ranges brought together clearly.
LT2254 W
Illustrative data · 03
Triathlon
A defensible foundation across multiple disciplines.
LT23.9 mmol/l
01 / 03
Photos generated with AI. App views come from the demo account with example data.
More than one formula
Multiple methods. Compared transparently.
See where models agree and where interpretation matters. Home meters scatter, so every threshold comes with a ± range instead of false precision.
Compare methods- 01Log-Poly-ModDmaxPolynomial curve fitting
- 02Mod. DmaxCurve-based inflection point
- 03DmaxGreatest distance from the curve chord
- 04DickhuthIndividual baseline
- 05DeltaRise from baseline
- 06MaderFixed 4-mmol/L threshold
Everything your measurements become
Analysis that keeps moving with your training.
01 · 6 Validated Methods
See thresholds. Understand uncertainty.
Log-Poly-ModDmax (Jamnick 2018), Modified Dmax (Bishop 1998), Dmax (Cheng 1992), Dickhuth, Delta, Mader — each with literature references.
Compare methods
Metabolic Profile
01Recovery100–148 W
02Endurance149–183 W
03Tempo184–219 W
04Threshold220–254 W
02 · LT1-Anchored Zones
Plan ranges. Dose the effort.
Z2 ends at your measured LT1 (San Millán & Brooks 2018), not at a fixed Coggan percentage.
Metabolic ProfileVO₂max × VLamax quadrant chart after Mader & Heck 1986 — VLamax from your sprint test: Sprinter, Power, Diesel or Base?
Calculate zonesMLSS Calibration+3.8%LT2 · 12 weeks
03 · Progression with Significance
Do not guess progress. Compare it.
Twelve weeks in the wrong zone feel like hard work and change nothing. A retest shows whether your LT2 really moved, or only the measurement noise did.
Error propagation checks whether your improvement exceeds measurement noise — 95 %, 68 %, or not significant.
MLSS CalibrationGold-standard validation: rank all 6 methods against your own MLSS constant test. (Lab tier)
Lactate test analysisBuilt around your work
One system. Three perspectives.
03
Lab
Link MLSS constant-load tests to step tests and compare methods for your own profile or your athletes.
Open lab demoResearch · Included with Lab
What the research says. Translated for your training.
Completed studies with posted results, translated into what they mean for your training.
Training & body fat
Randomized · both groups completed the same training
The example chart is held until its original source has been verified successfully.
Examples from the library
The summary is free. Result charts, data tables and the complete coaching interpretation come with Lab.
- Endurance training
HIIT versus circuit training: low volume, different VO2max effect
Randomized study · n = 42 · 2020Key messageWith HIIT, VO2max rose from 31.5 to 35.4 ml/kg/min, with circuit training from 31.4 to 32.4; the group difference is statistically supported (ANOVA, p < 0.01). Oxygen uptake at the ventilatory threshold also improved more with HIIT.
Full dossier with Lab - Recovery
Post-training cold water immersion: no measurable effect on HRV, sleep and jump performance
Randomized study · n = 75 · 2026Key messageWith and without cold water immersion, HRV, resting heart rate, sleep, perceived recovery and jump performance were nearly identical. The registry reports no statistical comparison; no measurable benefit of routine cold baths is apparent.
Full dossier with Lab - Sport psychology
Mindfulness training and mental fatigue: a benefit only for time to exhaustion
Randomized study · n = 53 · 2025Key messageOnly one of six primary outcomes differed between groups: time to exhaustion (ANCOVA, p = 0.001). After mindfulness training it was on average no longer shorter under mental fatigue than in the control condition, whereas it still was in the waitlist group. For VO2max, Flanker reaction time, accuracy, N2 and P3 the group comparison was not significant.
Full dossier with Lab
Choose simply
Simple Pricing
Start free, upgrade when ready
FREE
To try it out0€forever
- LT1/LT2 Calculation
- Training Zones
- Chart Visualization
- Save 2 tests
Most popular for home testers
ATHLETE
For your own tests19,99€per year
- Everything in Free
- Permanent data storage
- VLamax & metabolic profile
- Race pacing for marathon & Ironman
- See whether your training is working
- AI Interpretation
- PDF Export
COACH
For athlete groups49,99€per year
- Everything in Athlete
- Manage Athletes
- View Athlete Dashboards
- Progression & comparison per athlete
- Team Overview
- Priority Support
LAB
For diagnostics79,99€per year
- Everything in Coach
- MLSS calibration (gold standard)
- Per-athlete method ranking
- MLSS criterion check (Beneke 2003)
- Complete research library
- Interactive 6-method comparison
One lab test costs 150–300 EUR. A year of Athlete costs EUR 19.99.
Paid plans are billed once a year: one payment covers a full season of retests. There is no monthly plan.
Payment via Stripe · 14-day right of withdrawal · Withdraw from contract
| Feature | FREE | ATHLETE | COACH | LAB |
|---|---|---|---|---|
| LT1, LT2 and training zones | ||||
| Saved tests (∞ = unlimited) | 2 | ∞ | ∞ | ∞ |
| VLamax and metabolic profile | – | |||
| Race pacing (marathon, Ironman) | – | |||
| Progress with significance check | – | |||
| AI interpretation and PDF export | – | |||
| Manage athletes, team overview | – | – | ||
| MLSS calibration and method ranking | – | – | – | |
| Interactive 6-method comparison | – | – | – | |
| Complete research library | – | – | – |
Read and prepare
Go straight to the right lactate test analysis
Fast entry points for runners, cyclists, triathletes, coaches, and anyone calculating threshold values from test data.
01
Lactate test analysisThe central page for step-test values, LT1, LT2, VLamax and training zones.
Open02Analyze lactate testEnter step-test data and calculate LT1, LT2, VLamax, lactate curve and zones online.
Open03PDF protocolMeasurement sheet and step-test template for cycling and running before online analysis.
Open04Analysis methodologyUnderstand method comparison, data quality, LT1, LT2 and limits of self-testing.
Open05Calculate thresholdDetermine aerobic and anaerobic threshold from lactate values instead of percentage formulas.
Open06Calculate zonesDerive pace and power ranges from LT1 and LT2 for more precise training.
Open07Calculate VLamaxInterpret lactate production rate and metabolic profile for endurance, threshold and pacing.
Open08For runnersEstimate lactate threshold, marathon pace and training zones from pace and lactate values.
Open09For cyclistsAnalyze LT1, LT2, power zones and FTP comparison from indoor or outdoor tests.
Open10For triathletesDerive Ironman and 70.3 pacing from bike and run lactate test data.
Open11Compare methodsCompare Log-Poly-ModDmax, Modified Dmax, Dmax, Dickhuth, Delta and Mader transparently.
Open12Understand termsClear explanations of lactate threshold, LT1, LT2, MLSS, step tests and VLamax.
Open13Run your own testStep-by-step guide for test protocols, lactate meters and analysis without a lab.
OpenFree PDF template
Get PDF protocolLactate test protocol PDF
Use the template for your next at-home test: preparation, bike and run protocol, measurement sheet and analysis steps in one document.
Before your first test
Frequently asked questions about lactate test analysis
Answers to the most important search questions about lactate threshold, step tests, meters and training zones.
Can I analyze my lactate test myself?
Yes. Enter power or pace, lactate values and optional heart rate from your step test. LactateThreshold calculates LT1, LT2 and individual training zones.
Which lactate meters are supported?
The analysis works with any meter that gives lactate values in mmol/L, including Lactate Pro 2, Lactate Plus, EKF Lactate Scout, Lactate Express and similar portable devices.
What is lactate threshold?
Lactate threshold describes an intensity where lactate production and clearance become important for endurance performance. LT1 helps define easier endurance work, while LT2 is close to your highest sustainable intensity.
How do I run a step test myself?
Start at a low intensity and increase every 3 to 5 minutes, for example by 20 to 30 watts or 20 to 30 seconds per kilometer. Measure lactate at the end of each stage and enter the values.
What do LT1 and LT2 mean?
LT1 marks the transition into measurable lactate accumulation and helps guide Zone 2. LT2 is closer to threshold performance and is central for tempo, FTP and race pacing.
Which calculation methods does LactateThreshold use?
The app compares 6 scientific methods: Log-Poly-ModDmax, Modified Dmax, Dmax, Dickhuth, Delta and Mader. You see not only one value, but also the methodological spread of your result.
How accurate are home lactate meters, and what does that mean for my thresholds?
Portable meters such as Lactate Pro 2 or Lactate Scout can read systematically higher or lower than a lab analyzer, and single readings scatter. The app does not hide that: it recalculates your thresholds 500 times with device-typical noise and shows the result as a range (± watts or ± pace) instead of one falsely exact number. When you compare two tests, error propagation tells you whether the change is bigger than that noise. Use the same meter for every retest.
What makes a home step test good enough to analyze?
Stages of 3 to 5 minutes, a start intensity that is truly easy, even steps, a clean blood sample at the end of every stage, and enough stages for lactate to rise clearly. The app flags values outside the plausible range and shows curve quality (R²), so you can see when a test is too thin to trust. The guide "Lactate test mistakes" lists the most common errors in home tests.
Who is LactateThreshold not for?
It is not a medical diagnosis and does not replace a doctor. It does not estimate thresholds from heart rate or a watch alone: you need measured lactate values from a step test, and VLamax needs a separate sprint test. And it is not a lab: it analyzes the values you bring, so the result is only as good as your protocol and your meter.
Who builds this
Kristian Hoffmann
I’m Kristian Hoffmann, and I build LactateThreshold out of my own endurance training. It started with one question: why should analyzing a lactate test cost 150–300 EUR in a lab when the methods behind it are published sport science? Mader, Dickhuth, Dmax and the others are peer-reviewed and decades old. So every method in the app carries its literature reference, and you see the spread between methods instead of one black-box number. If something in your analysis looks wrong, write to me directly.
Your next analysis starts with the measurements.Start analysis