> For the complete documentation index, see [llms.txt](https://docs.tryterra.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tryterra.co/faq/help-topics/data-api-sdk/provider-coverage-and-per-provider-data-availability/huawei-hr-downsampled-upstream.md).

# Why are Huawei heart rate samples once per minute?

Huawei's public Health Kit only exposes the `com.huawei.instantaneous.heart_rate` stream, stored at **roughly one sample per minute**, plus activity-level aggregate stats.

Terra passes this through unchanged. The sparse cadence is upstream, not Terra downsampling, and there is no per-second HR timeseries from Huawei to forward.

For per-second workout HR, the providers that expose it publicly are **Garmin, Polar, COROS, and WHOOP**.