I am on a LV plan but on training days I often have enough time to switch out the assigned workout to a longer alternate (say 90 min instead of 60, or 120 instead of 90).
The longer workouts of the same level have a somewhat reduced intensity to make them still manageable.
Now I was wondering if I switched out every single workout to a longer one, does this even give me any training advantage? The progression through the levels would likely be the same as with shorter workouts so I would end up with the same result at the end of the plan but I would be accustomed to a little less intensity. So, no win really? Or do you reckon one would have a better progression through the levels with longer workouts?
Just having that extra time on the bike will be a huge benefit.
You’ll be burning more calories, building underlying fitness and working those cycling related muscles more.
I’m sure someone else can give a much more detailed answer but I do what you do, switch out a workout for a longer, similar PL alternate even if it less intense and think it can only be benefitting me in the long run.
Nothing is stopping you from choosing stretch workouts to at least close the gap a bit for the intensity difference of long and short workouts.