# heartRate(_:unit:) Creates a new heart rate alert for the target range. ``` static func heartRate(_ range: ClosedRange, unit: UnitFrequency = WorkoutAlertMetric.countPerMinute) -> Self ``` ## Parameters `range` A closed range of heart rate values. `unit` The frequency units used by the range values. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)