---
url: /docs/api/core/variables/heartRateSeriesSchema.md
---
[**@kaiord/core**](../README.md)

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[@kaiord/core](../README.md) / heartRateSeriesSchema

# Variable: heartRateSeriesSchema

> `const` **heartRateSeriesSchema**: `ZodObject`<{ `externalId`: `ZodOptional`<`ZodString`>; `intervalSeconds`: `ZodNumber`; `kaiordRecordId`: `ZodOptional`<`ZodString`>; `kind`: `ZodLiteral`<`"heart-rate-series"`>; `samples`: `ZodArray`<`ZodNullable`<`ZodNumber`>>; `sourceBridgeId`: `ZodOptional`<`ZodString`>; `startTime`: `ZodISODateTime`; `version`: `ZodString`; }, `$strip`>

Defined in: [packages/core/src/domain/schemas/health/heart-rate-series.ts:16](https://github.com/pablo-albaladejo/kaiord/blob/3eacbe62ef72342d970523967cc5155b5935bb85/packages/core/src/domain/schemas/health/heart-rate-series.ts#L16)

Zod schema for `extensions.health.heart-rate-series` — a read-only,
source-agnostic, compact uniform-interval daily heart-rate trace. Unlike
the six FIT-core health types it is not mandated to round-trip through
FIT, and unlike a recorded activity it is not tied to a workout session.

`samples` is a fixed-cadence array of per-slot heart-rate readings
starting at `startTime`, spaced `intervalSeconds` apart; `null` marks a
missing slot (a sensor gap). A refinement requires at least one non-null
sample — an all-gap series carries no information and is rejected.