Hi Ben – I’m in exactly the same situation as you. I’ve been injured and got back to it with about 4weeks training before my A race. I use Stryd power and set up the Stryd power zones app on my Garmin yesterday. I was trying to figure out how best to fit the X and Y zones into Stryds 5 zones. I ended up including zone X into Zone 3 (threshold), and zone Y into Zone 4 (interval). I think this is ok, as I use the stryd workout app for my structured run sessions which ensures I’m training in the right zones.
Makes sense combining zones 1&2 and 3&y on STRYD as suggested. Not ideal if you are running power; I don’t, but the guidelines work fine for tracking power on the STRYD Power Center. Similar to winoria, I just memorize the power caps for key segments of each workout.
my understanding is there is no mapping from stryd zones to 8020 zones. IIRC an 8020 coach told me if you are following 8020, its best to ignore the Stryd zones and just use the 8020 ones via TP and the Stryd Workout App.