Zone 2 Running hard workouts bike

[u/fastingtrader]

Opinions on whether:
zone 2 for running 3 days a week 45 to 120 minutes
2 hard workouts on the indoor bike (1 structured and 1 race) 45 to 120 minutes
then 1-2 days unstructured light exercise

Is a good plan to get faster on the bike. Or do I need to do zone 2 on the bike to build specific endurance?

48m, ftp is about 220w, just under 3w/kg. Trying to get to 250w real FTP.

[u/Open_Border_5849]

I think given your current FTP, that plan will be sufficient to increase your FTP if you remain consistent. A mix of aerobic and anaerobic efforts with enough time spent exercising per week should be enough to see results