Two sessions to improve your running - a brutally effective fartlek and a finely balanced threshold progression

A great fartlek and progressive threshold session to improve your running. Plus, the components that should be part of an effective run program, even though they’re not necessarily classified as “run sessions”. Part of this episode is original content, and part of it is a preview of the full episode "Power Rankings - Our top-5 run sessions to improve triathlon running performance" (release date 5th of February 2026). TOPICS COVERED IN THIS EPISODE: Mikael’s favourite Fartlek run Jack’s descending threshold session Why and how to do strides and hill sprints When is running off the bike a good idea? (Even though a lot of the time it isn’t a good idea, and it’s probably overused in triathlon) How hilly is a “hilly endurance run”? LEARN MORE ABOUT SCIENTIFIC TRIATHLON: The Scientific Triathlon website is the home of That Triathlon Show and everything else that we do Contact us through our contact form or email me directly (note - email/contact form messages get responded to much more quickly than Instagram DMs)

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Two sessions to improve your running - a brutally effective fartlek and a finely balanced threshold progression is an episode from That Triathlon Show by Mikael Eriksson.

This episode is 00:15:28 long.

This episode was published on Feb 3, 2026.

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