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Training science

Heart rate at lactate threshold: what is normal?

KH
Kristian Hoffmann
Founder, LactateThreshold
5 min read

Heart rate can help control training, but lactate threshold should not be reduced to a fixed percentage of max HR.

Why this matters

Two athletes can reach LT2 at very different heart rates. Use measured thresholds to calibrate, not guess.

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

Calibrate zones

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.

  • Record HR at every stage
  • Use HR as a secondary control metric
  • Expect drift in heat and fatigue
  • Do not use one fixed percentage for everyone

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.

Analyze your values 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.

Calibrate zones

Start directly with the demo, no account required.

Calibrate zones

Read next

The 5 training zones based on lactate threshold

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

8 min

How to run your own lactate test: the complete guide

With a portable lactate meter, a consistent protocol and a clean analysis workflow, you can run a useful step test without a lab.

8 min

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