Check the latest Progress Theory podcast as @freddiereadhead and @thepricep set out their first challenge. In this episode:

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• Freddie and Phil lay down the rules for the challenge.

• Discuss the determinants of endurance performance. What makes some endurance runners better than others?

• Introduce potential training zones based on understanding how the body utilises different energy systems.

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Follow their journey as they train for this challenge. Want to improve your 5km and 10km? Get involved and join in.