Question 1

What is a lactate threshold?

Accepted Answer

The lactate threshold is the exercise intensity at which blood lactate begins to accumulate faster than the body can clear it. There are two thresholds: LT1 (aerobic threshold) marks the first rise above baseline, and LT2 (anaerobic threshold) marks the onset of rapid accumulation. Training at or near these thresholds improves endurance performance.

Question 2

How do I use the Lactate Analyser?

Accepted Answer

Enter your graded exercise test data (power or pace, heart rate, and blood lactate for each stage), select one of 10 detection methods, and click Analyze. The app calculates your LT1 and LT2, displays an interactive lactate curve chart, and generates training zones. It supports both cycling (watts) and running (min/km pace).

Question 3

What is the Dmax method for lactate threshold?

Accepted Answer

The Dmax method fits a 3rd-degree polynomial to lactate-vs-intensity data, draws a straight line from the first to the last data point, and finds the point on the curve with the greatest perpendicular distance from that line. This point represents the intensity where lactate accumulation accelerates most sharply.

Question 4

What is OBLA (Onset of Blood Lactate Accumulation)?

Accepted Answer

OBLA stands for Onset of Blood Lactate Accumulation. It uses a fixed blood lactate concentration (typically 4.0 mmol/L) to identify the anaerobic threshold. The exercise intensity at which blood lactate reaches this fixed value is considered the OBLA threshold. A 2.0 mmol/L variant is also used for the aerobic threshold.

Question 5

Can I use this for running lactate tests?

Accepted Answer

Yes. The Lactate Analyser supports both cycling (power in watts) and running (pace in min/km). Toggle to Running mode, enter your pace values, and the app converts them internally for analysis. All results, charts, and training zones are displayed in pace format (min:sec per km).

Free Lactate Threshold Calculator

Test Data

Test History

#	Power (W)	HR (bpm)	Lactate (mmol/L)
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