Lower end of Z1 and upper end of Z7

[Nikolaj_fra_LoberLab]

Hi
I am curious as to how the lower end of Z1 is defined if i plan a structured wokout.
If i write Z1 pace for different runners i get from 32% til 49% as the “start” of the interval.
Same thing for top Z7

[LauraL]

@Nikolaj_fra_LoberLab

curious as to how the lower end of Z1 is defined if i plan a structured woko

There are issues reported with the lower end of Z1 and upper end of Z7, after some recent changes. We’re still waiting on an update, as far as I know.

[mvnchi]

I was about to open a thread on this.

As of right now we can only set the upper percentage values of each zone.

For example if you set Zone 1 to 75% it will use it as 0 - 75%.
The problem here is that for the load calculation the averages of intensity are used.
And because of this Intervals will only calculate with 37.5% in that case for Zone 1.
This leads to under calculation of load when you plan your workouts ahead.
Especially swim workouts using Pace as the portions in Zone 1 are now almost twice as long.

As a workaround i currently use the initial Zone 1 as a dummy.

But a neat fix would be if we were able to set a lower/upper end of Zone 1 and Zone 7 instead ourselves.

[R2Tom]

With custom zones you can create a Z1 with any range, like 50-70%

Custom zones work started

Workout prescription using custom zones is live now. The “Add Step” dialog has been upgraded to show custom zones and zone names. [Screenshot 2025-10-17 at 10.44.23] This only works for zones using the Power, Heartrate and Speed streams. [Screenshot 2025-10-17 at 10.49.14] If you have several sets of zones active for a sport and they have overlapping zone ID’s then the zone from the first zone found is used, in the same order as on the /settings page. There is a new checkbox in the dialo…

[mvnchi]

Oh that’s neat! Thanks for the heads up. I’ve been missing that one.

I’ve been searching but couldn’t find this. Where exactly are the Custom Zones located?

[MedTechCD]

Enable Beta features on the Settings page and you will find them on the sports tabs below the default zones.

[Nikolaj_fra_LoberLab]

Thanks - can you perhaps send me the thread with info on this?

[Nikolaj_fra_LoberLab]

I also thought about getting by with 6 zones and letting the Z1 be a “rest” one.
But this doesnt solve our “upper z7” issue

[Nikolaj_fra_LoberLab]

Thank you for this - however. It would be awesome to just see the “standard” zones have an upper and a lower end as well.
As @mvnchi explains load-calculation is soooo bad when using “Z1 Pace”

@david being able to set an upper boundary for Z7 and a lower for Z1 would be much appreciated.

[LauraL]

Sure, this comment summarises other posts on this topic/issue:

In Z1 or Z5 doesn´t work ok

There are similar posts on the same issue: Keep an eye on these for updates.

[Nikolaj_fra_LoberLab]

Thanks Laura!
Hopefully a solution i on the way