The Science Behind Getting Fitter & Faster: LT1, LT2 & Blood Lactate Explained | ft. Zander Mostert

The Science Behind Getting Fitter & Faster: LT1, LT2 & Blood Lactate Explained | ft. Zander Mostert

From Easy Double podcast by Easy Double

May 13, 2026 · 1h 4m

About this episode

This episode features coach Zander Mostert discussing the science of endurance performance and training metrics.

This week on the Easy Double Podcast we’re joined by coach and sports scientist Zander Mostert for one of our most educational episodes yet. We break down the science behind endurance performance and unpack the concepts runners hear all the time — but often don’t fully understand — including blood lactate, threshold training, LT1, LT2, Zone 2, aerobic development and how elite athletes actually use these metrics in training. Using Ryan’s recent lactate test as a real-world example, Zander explains: What lactate actually is The difference between LT1 and LT2 Why threshold training is so effective How to know if your easy runs are truly easy Common misconceptions around “zones” and heart rate training Why most runners probably train too hard too often How lactate testing can be used to individualise training The relationship between volume, thresholds and race performance Whether you’re chasing a marathon PB, trying to better understand your own training, or simply curious about the physiology behind endurance performance, this episode is packed with practical insight. We also discuss how elite runners structure threshold sessions, why building your aerobic system is so important…

People in this episode

Host: Easy Double

Guest: Zander Mostert

Topics covered

  • endurance performance
  • blood lactate
  • threshold training
  • aerobic development
  • lactate testing
  • training metrics

Keywords

  • LT1
  • LT2
  • heart rate training
  • aerobic system
  • marathon PB
  • threshold sessions
  • training individualization

Mentioned in this episode

Organizations: Front Runner

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