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# HKMetadataKeyHeartRateMotionContext

The user’s activity level when the heart rate sample was measured.

```
let HKMetadataKeyHeartRateMotionContext: String
```

## Discussion

This key takes an <doc://com.apple.documentation/documentation/Foundation/NSNumber> containing an [`HKHeartRateMotionContext`](/documentation/HealthKit/HKHeartRateMotionContext) as its value.

## Topics

### Valid Motion Contexts

[`enum HKHeartRateMotionContext`](/documentation/HealthKit/HKHeartRateMotionContext)

Values that indicate the user’s level of activity when the heart rate sample was measured.

## See Also

[`static let heartRate: HKQuantityTypeIdentifier`](/documentation/HealthKit/HKQuantityTypeIdentifier/heartRate)

A quantity sample type that measures the user’s heart rate.


---

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