As @Mikewpg1ca helpfully points out and explains, they are!! 
I’ll share this post here as well: Adaptive Training and the Polarized Plans - #41 by SarahLaverty.
I encourage you to use Plan Builder while making use of the Polarised plans.
We have two types of Polarised plans - one for the Base phase and one for Build phase. You can swap these in for the normal Base & Build phases during the Plan Builder process.
When you get to the Schedule section of Plan Builder, you will see the option to “Customize training days for each block”. See the screenshot below. Toggle this on (green).
Then you will see the following option:
Use the drop down menu to switch out the Base and Build for the Polarised Plans.
This way you can use Plan Builder to get the perfect schedule heading into your events and still use Polarised plans.
