Most of my bike rides are ‘hard’ and most of my runs are easy. This is all based on perceived effort, I don’t use any tech.
A ‘hard’ perceived effort on the bike varies greatly based on distance/duration.
A z2 bike effort for 2.5 hrs for me at 220watts the whole way feels decently ‘hard’ for me. I have to focus on keeping the speed up the whole time to maintain that sort of effort, even if I’m not redlining, and in the last 20 minutes, it can be a struggle.
A z4-5 VO2max or beyond effort, for me 320+ watts for 1-3 minutes feels hard as well, in a slightly different way.
But are your zones correctly set? I can definitely see 220 being hard if 320 is vo2 max, but that’d make the 220 more like z3.
220 is my typical Z2 ride as well, but it’s a really boring, can do this all day without even thinking about it type of outdoor ride while.vo2 is more 390+ (for 3-5 minute repeats in season).
I’m using the 80-20 zone calculator
https://www.8020endurance.com/8020-zone-calculator/
Honestly, I haven’t tested my FTP for quite awhile, but I done know that I can ride 2.5 hrs at a hard, but sustainable level at 220 watts without burying myself, and the I can do VO2max short intervals at over 300 watts. Per that calculator, that probably pegs me at around 260-270 FTP, which is probably about right for me.
For you, I’d estimate that being able to do 220w all day and 390+ for 3-5 min repeats is def FFFOP cycling for triathlon!