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Workout Heart Rate Zones display 0s / 0% for Samsung Health workouts

Bug Reports

Heart Rate Zone time distribution is not calculated for workouts synced from Samsung Health.

​While the workout summary correctly shows average HR (e.g., 145 bpm / Zone 3) pulled from Samsung Health, the Heart Rate Zones breakdown below displays 0s | 0% for every single zone (Zone 0 through Zone 5).

Posted by Oleksandr Petrov ·
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  • Oleksandr Petrov

    •

    Jul 31

    Update / Additional context:

    ​I’ve isolated the conditions for this issue:

    • ​Direct Samsung Health integration: Displays 0s | 0% for all HR zones (granular time-series HR data is missing or not parsed).

    • ​Workaround via Health Connect: If I enable sync through Health Connect (routing Samsung Health data into Health Connect and letting Sonar read the data from both: S Health and Health Connect), the HR zones load and calculate as expected.

    ​This confirms the issue is specifically isolated to how Sonar handles/parses workout HR time-series payloads directly from the Samsung Health SDK.

    • Conrado Franceschi

      •

      Aug 27

      Apologies for the trouble here, and thanks for the detailed report.

      The bug is real and we have confirmed the cause. It sits in our Android app, not in your setup or your watch: Samsung Health gives us heart rate as summary records, and our app has been reading the summary value while skipping the individual measurements recorded inside each one. That leaves a workout with a single heart rate reading, and zone time cannot be calculated from one reading, so every zone comes out at 0s. The average and the badge still look right because Samsung sends those separately.

      This affects every workout arriving through Samsung Health, so it is not specific to your account. The fix is with our Android team, and it lands alongside a broader round of improvements and rewrites the app is going through. We would rather not put a date on it until the change is in testing.


      To be upfront: the fix will not repair your existing workouts. Those measurements never left your phone, so there is nothing on our end to recalculate.

      In the meantime, the routing you worked out is the right one. Workouts coming through Health Connect carry the full heart rate series and their zones calculate correctly.


      Please keep us posted if anything else looks off.