This is a feature that exists in elevate for Strava, and that you can ‘fake’ using training peaks.
It would be useful to have the training zones apply only to a range of dates, so that changes in threshold can be reflected in the zones over time, and things like time-in-zones can be compared between seasons or periods within a season. Presumably this can be accomplished only for new, incoming workouts by changing the zones the current values, but having this more structured would allow for analysis of past activity in the system.
Thanks for the reply. I am conceptually comparing it to something in the “elevate” app, which has you set threshold and such at given dates. I believe it then processes based on that. I change zones a lot, and it would be interesting to be able to back-calculate relatively easily. Definitely a “nice to have”, and I’m thinking there are much bigger priorities.
You can set Thresholds for given dates on Intervals.icu and it processes based on those new thresholds. All old data is reprocessed.
On the Activities tab you can select dates + edit data.
In the Totals page, I want to compare time in zones Sep 2023 to Sep 2022. Are the time in zones Sep 2022 based on the zone-settings I had Sep 2022 or are they based on the present settings Sep 2023?
The displayed zones are your current settings. The time data is taken for the “time in zones” stored on each activity. So it is not recalculated to reflect your current zone power, HR or pace ranges. So if you used to have 5 zones and now have 7 your old activities will have zero time in Z6 and Z7. The zones are copied onto each activity when it is first analysed and the times calculated.
Hi @david . Quick question here. What do you think is the most sensible way to deal with zone changes over time? If my LTHR or FTP (running) changes, should I back-calculate all my old activities until today to reflect that I am maybe more physically capable? Or should you keep everything as of the date that I have done the activity?
I think you should keep the history as it is. I just bumped up my FTP so now if I do the same power the intensity, load etc. is all less. But that makes sense because I have got stronger so the rides should be easier for the same power.
