Hi Piotr @piomic …
You can’t go wrong here with either way you play this … as all plans are ‘distinct’ separate plans there will sometimes be times you want to tweak things and you’ve found tone right here - as coach says … this is often used as a starter plan assuming people don’t want/won’t fleet as much benefit from 4DP
(And sorry I don’t have any knowledge of your cycling background here so pls take in spirit intended … )
If you’re confident with going for a 4DP week … for various reasons … you might have background in indoor training and be pretty aware of your power numbers and therefore be able to pace the 5 and 20 minute sections well … then go for it but just don’t do Half Monty at the start of your second plan.
If indoor training or training with power is brand new to you then you might choose to do a week of training (like the 4DP plan but not do the test as it will be harder to pace it after just a week) then you could just do some workouts … get used to the platform and then hit that plan that has half Monty at the start (if half Monty had existed when I started on indoor training I’d be doing this)
You could just launch straight in to that plan straight off.
With no experience of indoor numbers then Half Monty will set you up with sensible numbers to work with for your first plan.
With loads of experience and you just want to check your numbers are right before doing your first plan … do the FF/4DP week