Suunto Vertical 2 HR and Tempo zones

Milan Novák

Hello, I am trying to set HR zones and pace in watches, after I did anaerobic threshold test, my zones HR zones are
Z1: 100–130
Z2: 131–140
Z3: 141–148
Z4: 149–158
Z5: 159–182

and pace is

Z1: 7:45/km
Z2: 7:00/km
Z3: 6:35/km
Z4: 6:10/km

when I set it in watches under Settings -> Training -> Intensity zones -> Advanced zones -> Running -> Special Hr Zones for running turned on and I set hr zones there, that is ok
but when I am trying to set Pace zones in same menu, it is saved for about week, but then it will rst to times, you can see on screenshot. Why is it doing that? There is problem, when I generate training plan from suunto coach, first week is generated correct but when I started second week, paces where changed and whole training for second week was generated with new wrong zones, that is absolutely unrealistic for me in my actual sport condition :)… Any advice, how to make it permanent?

THX!

isazi

@Milan-Novák interesting, mine did never reset, but you are the second person I hear having this issue. Can you send logs after this happens again?

Squirrel

This is an old issue that’s been mentioned several times on the forum.
Still present on Race S, don’t know about other watches, but it is super easy to test.
Set custom pace zones, hold upper button for 12+ seconds to reboot the watch and now pace zones are reset to default 6’00, 5’30, 5’00, 4’30/km.

First time appeared perhaps in Nov 2025 firmware update
https://forum.suunto.com/post/179150

Seems like one of those things that will never get fixed.