Polarized uses a three zone model. Z2 on the seven-zone scale is Z1 in polarized.
So, 3h20m of 50-80% FTP.
See below:
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The following Low-Volume phases are ‘non sweet spot’, and don’t have any sweet spot workouts in them at all!
- Traditional Base
- Short Power Build
- General Build
- Sustained Power Build
- plus every Specialty Phase in Road and Enthusiast with the exception of Century.
Adding these phases to your calendar as ‘ad-hoc’ plans also function within Adaptive Training. 
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