---
title: HKWorkoutZoneConfiguration.Source.system
framework: healthkit
role: symbol
role_heading: Case
path: healthkit/hkworkoutzoneconfiguration/source-swift.enum/system
---

# HKWorkoutZoneConfiguration.Source.system

A case that indicates the system generated the zones automatically.

## Declaration

```swift
case system
```

## Discussion

Discussion The system calculates zones based on the person’s health metrics, including age, resting heart rate, height, and weight. The system recalculates these zones periodically as the person’s metrics change.

## See Also

### Identifying the source

- [HKWorkoutZoneConfiguration.Source.user](healthkit/hkworkoutzoneconfiguration/source-swift.enum/user.md)
- [HKWorkoutZoneConfiguration.Source.app](healthkit/hkworkoutzoneconfiguration/source-swift.enum/app.md)