{
  "$schema": "https://raw.githubusercontent.com/guitaripod/wwdc-sessions/master/schema/session.schema.json",
  "schemaVersion": 1,
  "id": "wwdc2026-207",
  "event": "wwdc2026",
  "eventName": "WWDC26",
  "year": 2026,
  "eventContentId": 207,
  "title": "Deliver workout insights with HealthKit workout zones",
  "description": "HealthKit makes it easier to provide workout insights — like heart rate and cycling power zones — in your app. Learn to leverage the built-in, personalized zones or create custom ones. Discover how to use the current zone and time spent in each zone to provide meaningful guidance during and after workouts.",
  "url": "https://developer.apple.com/videos/play/wwdc2026/207",
  "sosumiURL": "https://sosumi.ai/videos/play/wwdc2026/207",
  "type": "Video",
  "publishedAt": "2026-06-08T14:00:00-07:00",
  "platforms": [
    "iOS",
    "iPadOS",
    "visionOS",
    "watchOS"
  ],
  "keywords": [],
  "topics": [
    "SwiftUI & UI Frameworks",
    "Health & Fitness"
  ],
  "primaryTopic": "Health & Fitness",
  "duration": 735,
  "hasTranscript": true,
  "transcriptWordCount": 1802,
  "availableLanguages": [
    "eng",
    "fra",
    "jpn",
    "kor",
    "por",
    "spa",
    "zho"
  ],
  "media": {
    "hls": "https://devstreaming-cdn.apple.com/videos/wwdc/2026/207/5/8627c1d4-7a34-46f2-8491-f0d1c138edd1/cmaf.m3u8",
    "downloadHLS": "https://devstreaming-cdn.apple.com/videos/wwdc/2026/207/5/8627c1d4-7a34-46f2-8491-f0d1c138edd1/cmaf-download.m3u8",
    "downloadSD": "https://devstreaming-cdn.apple.com/videos/wwdc/2026/207/5/8627c1d4-7a34-46f2-8491-f0d1c138edd1/downloads/wwdc2026-207_sd.mp4",
    "downloadHD": "https://devstreaming-cdn.apple.com/videos/wwdc/2026/207/5/8627c1d4-7a34-46f2-8491-f0d1c138edd1/downloads/wwdc2026-207_hd.mp4",
    "duration": 735
  },
  "codeSnippets": [
    {
      "title": "Reading Heart Rate Zones from a completed workout",
      "language": "swift",
      "startTimeSeconds": 234,
      "code": "// Read heart rate zones from the completed workout\n\nif let heartRateZoneGroup = workout.zoneGroupsByType?[HKQuantityType(.heartRate)] {\nlet zones = ZoneDisplayData(\n    zoneCount: heartRateZoneGroup.configuration.zones.count,\n    currentZoneIndex: nil,\n    durations: heartRateZoneGroup.zoneDurations.map(\\.duration)\n)"
    },
    {
      "title": "Handling Live Zone Updates",
      "language": "swift",
      "startTimeSeconds": 477,
      "code": "func workoutBuilder(_ workoutBuilder: HKLiveWorkoutBuilder,\n                    didUpdateWorkoutZone zoneUpdate: HKLiveWorkoutZoneUpdate) {\n    guard let zoneGroup = zoneUpdate.zoneGroup else {\n        return\n    }\n    if let currentIndex = zoneUpdate.currentZoneDuration?.zone.index {\n        let data = ZoneDisplayData(\n            zoneCount: zoneGroup.configuration.zones.count,\n            currentZoneIndex: currentIndex,\n            durations: zoneGroup.zoneDurations.map(\\.duration)\n        )\n        Task { @MainActor in\n            self.heartRateZones = data\n        }\n    }\n}"
    },
    {
      "title": "Check if Preferred Zone has been set",
      "language": "swift",
      "startTimeSeconds": 559,
      "code": "if try await builder.zoneConfiguration(for: HKQuantityType(.heartRate)) == nil {"
    },
    {
      "title": "Create Zone Boundaries",
      "language": "swift",
      "startTimeSeconds": 564,
      "code": "let defaultHeartRateZoneThresholds = [91.0, 114.0, 136.0, 158.0]\n    let bpmUnit = HKUnit.count().unitDivided(by: HKUnit.minute())\n    let boundaries = defaultHeartRateZoneThresholds.map(\n        {HKQuantity(unit: bpmUnit, doubleValue:$0)}\n    )"
    },
    {
      "title": "Create Default Workout Zone Configuration",
      "language": "swift",
      "startTimeSeconds": 573,
      "code": "let heartRate = HKQuantityType(.heartRate)\n    let defaultConfiguration = try HKWorkoutZoneConfiguration(quantityType: heartRate,\n                                                              zoneBoundaries: boundaries)"
    },
    {
      "title": "Set Custom Zone Configuration",
      "language": "swift",
      "startTimeSeconds": 598,
      "code": "try await builder.setCustomZoneConfiguration(defaultConfiguration,\n                                                 for: heartRate)\n}"
    },
    {
      "title": "Begin Data Collection",
      "language": "swift",
      "startTimeSeconds": 603,
      "code": "// Begin data collection\nlet startDate = Date()\ntry await builder.beginCollection(at: startDate)"
    }
  ],
  "resources": [
    {
      "title": "Tracking heart rate zones for workouts",
      "url": "https://developer.apple.com/documentation/HealthKit/tracking-heart-rate-zones-for-workouts",
      "type": "samplecode",
      "description": "Start a workout on iOS or watchOS and track and display heart rate zones.",
      "sosumiURL": "https://sosumi.ai/documentation/HealthKit/tracking-heart-rate-zones-for-workouts",
      "doccJSON": "https://developer.apple.com/tutorials/data/documentation/HealthKit/tracking-heart-rate-zones-for-workouts.json"
    },
    {
      "title": "Accessing workout zone data",
      "url": "https://developer.apple.com/documentation/HealthKit/accessing-workout-zone-data",
      "type": "documentation",
      "description": "Provide training insights to people on your app using workout zone data.",
      "sosumiURL": "https://sosumi.ai/documentation/HealthKit/accessing-workout-zone-data",
      "doccJSON": "https://developer.apple.com/tutorials/data/documentation/HealthKit/accessing-workout-zone-data.json"
    }
  ],
  "path": "sessions/wwdc2026/207-deliver-workout-insights-with-healthkit-workout-zones/",
  "files": {
    "metadata": "sessions/wwdc2026/207-deliver-workout-insights-with-healthkit-workout-zones/metadata.json",
    "readme": "sessions/wwdc2026/207-deliver-workout-insights-with-healthkit-workout-zones/README.md",
    "transcript": "sessions/wwdc2026/207-deliver-workout-insights-with-healthkit-workout-zones/transcript.md",
    "transcriptJSON": "sessions/wwdc2026/207-deliver-workout-insights-with-healthkit-workout-zones/transcript.json"
  }
}