Replace generic percentage ranges with zones anchored to your measured thresholds.
Heart-rate or FTP percentage ranges are convenient but often imprecise. Lactate-based zones are anchored to where your metabolism actually changes: below LT1, between LT1 and LT2 and above LT2.
First LT1 and LT2 are calculated from the lactate curve.
Training zones are anchored to the thresholds and returned as pace or watts.
Separate long endurance, tempo work and intervals more precisely.
Many athletes train Zone 2 too hard because it is estimated only from FTP or max heart rate. An LT1-anchored zone prevents exactly that.
Yes. Once LT1 and LT2 are determined, individual zones for pace or watts can be derived.
They measure something different. Heart rate is useful for control, while lactate shows the metabolic load behind a pace or power value more directly.
LT1 marks the point where lactate starts to rise measurably. If Zone 2 extends above LT1, it is too intense for many athletes.
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