Calculate LT1, LT2 and power zones in watts, more directly than a generic FTP estimate.
For cyclists, a lactate step test is one of the most precise ways to understand metabolic thresholds because watts can be controlled very reliably.
In cycling, lactate threshold is the power where lactate remains stable. Above LT2, lactate rises quickly and sustainable power drops.
LT1 is your aerobic endurance boundary and helps define long ride intensity and base training.
LT2 is close to FTP for many trained cyclists, but it is measured from lactate rather than estimated from a maximal effort.
Use lactate values to define pacing for time trials, gran fondos and stage events from your own metabolic profile.
Easy recovery riding with low lactate accumulation.
Aerobic base and long rides.
Tempo and time-trial preparation.
FTP-like work and sweet spot intensity.
Intervals and climbs at high aerobic load.
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Popular in cycling camps and coaching, with small sample volume and Bluetooth.
Compact budget entry and easy to carry.
Strong precision at low lactate values, useful for Zone 2 diagnostics.
FTP estimates functional threshold power from a maximal effort. A lactate test measures metabolic thresholds directly from blood lactate across stages.
Start at an easy wattage and increase every 3-5 minutes by about 20-30 W. Measure lactate at the end of each stage and enter the data.
They are often close in trained cyclists, but not identical. Lactate gives the more direct metabolic measurement.
A low VLamax often supports endurance cycling by reducing carbohydrate use and improving durability.
Two to three times per year is practical, plus after major training breaks or clear form changes.
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