I tried the recommendation https://api.fitbit.com/1/user/-/activities/heart/date/[date]/[end-date]/[detail-level].json from this page https://dev.fitbit.com/docs/heart-rate/ but it returns strange data (like Yoga activities and so on).
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@CBSA Can I see the exact call you're making? Detail-level "1sec" doesn't appear to work with that particular endpoint, so if you're using that, maybe try using "1min" instead.
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