<!--
{
  "availability" : [
    "iOS: 27.0.0 -",
    "iPadOS: 27.0.0 -",
    "macCatalyst: -",
    "macOS: 27.0.0 -",
    "visionOS: 27.0.0 -",
    "watchOS: 27.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "HealthKit",
  "identifier" : "/documentation/HealthKit/HKWorkoutZoneGroup",
  "metadataVersion" : "0.1.0",
  "role" : "Structure",
  "symbol" : {
    "kind" : "Structure",
    "modules" : [
      "HealthKit"
    ],
    "preciseIdentifier" : "s:9HealthKit18HKWorkoutZoneGroupV"
  },
  "title" : "HKWorkoutZoneGroup"
}
-->

# HKWorkoutZoneGroup

A structure that contains zone configuration and time-in-zone data for a quantity type.

```
struct HKWorkoutZoneGroup
```

## Overview

This structure combines an [`HKWorkoutZoneConfiguration`](/documentation/HealthKit/HKWorkoutZoneConfiguration) with an array of [`HKWorkoutZoneDuration`](/documentation/HealthKit/HKWorkoutZoneDuration) instances. Access zone groups from [`HKWorkout`](/documentation/HealthKit/HKWorkout) and [`HKWorkoutActivity`](/documentation/HealthKit/HKWorkoutActivity) instances to retrieve zone data for completed workouts, or from [`HKWorkoutBuilder`](/documentation/HealthKit/HKWorkoutBuilder) for real-time zone information during active workouts.

## Topics

### Accessing group properties

[`configuration`](/documentation/HealthKit/HKWorkoutZoneGroup/configuration)

A property that specifies the zone configuration that defines the zones for this group.

[`zoneDurations`](/documentation/HealthKit/HKWorkoutZoneGroup/zoneDurations)

A property that contains the time spent in each zone, ordered from lowest to highest threshold.

## Relationships

### Conforms To

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Sendable`](/documentation/Swift/Sendable)

---

Copyright &copy; 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)