I’m in sustained power build. Now that the weather is better, I am swapping out the easy ride on Wednesday (1h30 zone 2) for an outside ride, and my Sunday ride (which is sweet spot-ish) for a very long zone 2 ride (4-5 hours), to train for century.
However, what to do about Saturday? Is it really necessary to do threshold (intervals of 108% for 1h30, with a zone2/3 at the for anearobic endurance) INSIDE?
I feel that riding outside is more simple for me, so I can typically push 20-25 watts more according to my power meter compared with TSS and heart rate data inside.
Could I just do more extended threshold sessions (2-2h30) outside instead? Or would that lower the effectiveness of the sustained power build?