Anyone have that chart of different intensity zones and their purpose?

[ArHu74]

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I *Thought* I Knew The Difference Between VO2max And Threshold

Yep - there other workouts to elicit VO2max - like Tabatas. My point above is that typical vo2max workouts are very different than a threshold workout. FWIW - a meta study from last year indicated 4+ min intervals more effective than sprint intervals at improving TT performance. That’s a little splitting hairs however. Just do Vo2max work! https://www.researchgate.net/publication/339121462_Effect_of_High-Intensity_Interval_Training_Versus_Sprint_Interval_Training_on_Time-Trial_Performance_A_Sy…