Propagating FTP & heart thresholds

When I update my FTP in mid training plan, how does that result in Training Peaks recalculating my indoor trainer workouts? Do I need to delete & re-apply my plan?..even through I’m half way into it? I’m not sure how this works.

TP should update the workout targets following an FTP change in Settings. Where you may run into issues is if those workouts have already synced to another device then they may not update. I usually run my indoor workouts off a bike computer so that means I need to delete them all from the computer then reload them. I load the computer driven workouts from saved files versus the sync. I haven’t been using Zwift long so I don’t know how far in advance they sync, same goes for if you have your computer sync them.