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What is lactate threshold? The science behind triathlon’s favourite training buzz phrase

You've probably seen the phrase 'lactate threshold' thrown around a lot in the world of triathlon training. But what does it mean, and how can improving your thresholds benefit your performance?

By Jenny Lucas-Hill

Content Director

Last updated -

16 Jul 2025

Lactate threshold is a phrase we seen thrown around a lot in the world of triathlon training. From behind the scenes videos of the PROs having blood samples taken from their ear lobes in the midst of ...

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Written by

Jenny Lucas-Hill

Jenny Lucas-Hill is Content Director at TRI247. A five-time Ironman finisher, she's also a qualified personal trainer and sports massage therapist.

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