I’m doing IM Vichy again next year which is Dammed Hilly (and very hot)
Last year the IM plans on here did not prepare me very well for the route which includes 2 hills over 10mile long (amongst others). I am a big lad, A weak cyclist, and to climb these hills I am close averaging to FTP for the duration of the climbs (leaving me well in the red)
To get me ready for the race next year I am still using TR for some workouts, but also using Rouvy for my training.
I use TR for intervals and the such
But use Rouvy for: -
Endurance - at the moment doing one on the 70.3 routes every week (including Vichy 70.3 every 2 weeks)
Strength Endurance - Doing a classic climb (1-2 hrs in duration) once per week
My race is not till late August
(this is just my approach and my be looked down upon by TR puerists)