About this episode

Steve House and Will Zittlau discuss the Continuous Aerobic Threshold feature in Uphill Athlete's Training Groups dashboard and its implications for athlete training.

Steve House and Will Zittlau pull back the curtain on Continuous Aerobic Threshold, a new feature inside Uphill Athlete's Training Groups dashboard that automatically calculates an athlete's AeT each week using a four-week moving average of their training data — no field test required. Steve explains the core problem: athletes can do the work consistently and still be uncertain whether they trained at the right intensity, because a missed AeT quietly shifts aerobic sessions into glycolytic territory and derails the adaptation they were after. To validate the algorithm, Steve blind-scored 65 athlete files by hand and found the tool lands within an average of 0.1 beats of his coaching judgment — though that average masks a wider spread, with 62% of athletes falling within five beats and outliers as far as 17 beats off, a gap the team attributes largely to data quality. The episode is candid about where the tool still falls short and what they're doing to close it: improving filtering (wrist-based HR and mountain bike data are particularly noisy), building data-hygiene habits in the community, and targeting 99% of athletes within five beats of coach-level accuracy by year's end. And…

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