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Training science

Running step-test protocol: determine lactate threshold in pace

KH
Kristian Hoffmann
Founder, LactateThreshold
6 min read

Running protocols are more sensitive than cycling protocols because pace, surface and sampling must be controlled carefully.

Why this matters

A treadmill is easiest for repeatability, while an outdoor course can be closer to racing conditions.

What to record

For every useful lactate analysis, intensity and lactate must be linked clearly. Record pace or watts, mmol/L value, heart rate if available and the stage duration.

  • Pace or watts for each stage
  • Lactate in mmol/L
  • Optional heart rate and RPE
  • Test conditions such as heat, altitude, sleep and nutrition

Analyze running test

Analyze your step test for free: LT1, LT2, VLamax and 5 training zones are calculated immediately.

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How to interpret it

Look at the curve, not only at one value. LT1, LT2, VLamax and zones become more reliable when the protocol is repeatable and the curve shape is plausible.

  • Use a treadmill or flat course
  • Increase pace gradually
  • Avoid long pauses for sampling
  • Repeat future tests in the same setting

Practical next step

Use the same protocol for future tests and compare trends instead of overinterpreting one isolated result.

Start lactate test analysis directly

If you already have values, go to the central analysis page or start the demo with example data.

Start demo PDF protocol

Why you can trust the analysis

LactateThreshold does not turn measurements into false precision. The app shows the curve, method comparison, plausible thresholds and the limits of your test protocol transparently.

Read methodologyDisclaimer
Method comparison instead of a single black-box value
Clear separation of LT1, LT2, VLamax and training zones
Limits of self-testing are stated openly
Training guidance, not a medical diagnosis

Frequently asked questions

Can I use my own lactate values?+
Yes. Enter pace or watts and lactate values from each stage. The app calculates the curve, thresholds and zones.
Do I need a lab?+
No lab is required for the software analysis if your measurements are clean. Medical diagnostics are a separate use case.
Which meters work?+
Any portable meter that reports mmol/L values can be used, including Lactate Pro 2, Lactate Plus, Lactate Scout and Lactate Express.

Analyze running test

Start directly with the demo, no account required.

Analyze running test

Read next

Lactate test on treadmill vs. outdoors

Both setups can work. The treadmill is easier to standardize, outdoors can be more race-specific.

6 min

The 5 training zones based on lactate threshold

Lactate-based zones anchor training intensity to measured metabolism instead of generic percentage formulas.

8 min

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