Feels like this belongs here more than the Road thread. I've just started a training plan on Garmin to try and give me more structure. However my issue is that Garmin seems to hugely overestimate my FTP.
When i rode indoors, Strava would estimate me around 220W. That feels like it's fairly accurate, however Garmin seems to regularly update after a normal ride and say it's 280W.
My general rides over an hour usually fall around 180W-190W and would include some hills and some easier recovery. Here's an example of the most recent ride which was a step up in distance compared to usual.
Martyn T rode 56.0 km on Dec 17, 2023.
www.strava.com
I can only assume that Garmin is assuming i'm at 190W at Zone 2 based on HR and then calculating up to maximum effort, however there's no chance my legs could manage 280W for an hour, even if my HR suggests there's space. The problem being that the Garmin training plan takes an FTP of 280w and is setting me targets based on that. I could manually drop it down, but then Garmin is going to keep wanting to increase it!
Anyone have any decent suggestions?