I'm using Healthkit with the following H/W specs: Apple Watch, series 8, OS: 10.6.1 (21U580) iPhone 11 Pro, OS: 17.6.1 Mac Studio M1 Xcode ver: 16.0 (16A242d) I am trying to get Apple Watch to report heart rate, HRV, respiratory rate, and body temperature using Healthkit's HKLiveWorkoutBuilder implementing HKLiveWorkoutBuilderDelegate's workoutBuilder method. However, the only reported value that is found from the workoutBuilder method's collectedTypes (a Set of HKSampleType objects) is HKQuantityTypeIdentifierHeartRate. Nothing for HRV, respiratory rate, or body temperature. All entitlements are set up, the plist filled in, and capabilities in place. Not sure why only the heart rate is reported from the watch but nothing else. I've scoured StackOverflow, Apple developer forums, even ChatGPT but none of the solutions work. Any help most appreciate! The model code is: import Foundation import HealthKit class WatchModel: NSObject, HKLiveWorkoutBuilderDelegate, HKWorkoutSessionDelegate { private let healthStore = HKHealthStore() private var workoutSession: HKWorkoutSession! private var workoutBuilder: HKLiveWorkoutBuilder! override init() { super.init() requestAuthorization() startWorkoutSession() } private func requestAuthorization() { let heartRateType = HKQuantityType.quantityType(forIdentifier: .heartRate)! let respiratoryRateType = HKQuantityType.quantityType(forIdentifier: .respiratoryRate)! let HRVRateType = HKQuantityType.quantityType(forIdentifier: .heartRateVariabilitySDNN)! let temperatureRateType = HKQuantityType.quantityType(forIdentifier: .bodyTemperature)! let healthDataTypes: Set = [heartRateType, respiratoryRateType, HRVRateType, temperatureRateType] healthStore.requestAuthorization(toShare: healthDataTypes, read: healthDataTypes) { (success, error) in if !success { print("Authorization failed") } } } func workoutSession(_ workoutSession: HKWorkoutSession, didChangeTo toState: HKWorkoutSessionState, from fromState: HKWorkoutSessionState, date: Date) { } func workoutSession(_ workoutSession: HKWorkoutSession, didFailWithError error: any Error) { } func workoutBuilderDidCollectEvent(_ workoutBuilder: HKLiveWorkoutBuilder) { } func startWorkoutSession() { let configuration = HKWorkoutConfiguration() configuration.activityType = .other configuration.locationType = .indoor do { workoutSession = try HKWorkoutSession(healthStore: healthStore, configuration: configuration) workoutBuilder = workoutSession.associatedWorkoutBuilder() workoutBuilder.delegate = self workoutBuilder.dataSource = HKLiveWorkoutDataSource(healthStore: healthStore, workoutConfiguration: configuration) let dataSource = HKLiveWorkoutDataSource(healthStore: healthStore, workoutConfiguration: configuration) let respiratoryRate = HKQuantityType(.respiratoryRate) dataSource.enableCollection(for: respiratoryRate, predicate: nil) let bodyTemp = HKQuantityType(.bodyTemperature) dataSource.enableCollection(for: bodyTemp, predicate: nil) let hrv = HKQuantityType(.heartRateVariabilitySDNN) dataSource.enableCollection(for: hrv, predicate: nil) workoutSession.delegate = self workoutSession.startActivity(with: Date()) workoutBuilder.beginCollection(withStart: Date(), completion: { (success, error) in if let error = error { print("Error starting collection: \(error.localizedDescription)") } }) } catch { print("Failed to start workout session: \(error.localizedDescription)") } } func workoutBuilder(_ workoutBuilder: HKLiveWorkoutBuilder, didCollectDataOf collectedTypes: Set<HKSampleType>) { print("collected types: \(collectedTypes)") for type in collectedTypes { if let quantityType = type as? HKQuantityType { if quantityType == HKQuantityType.quantityType(forIdentifier: .heartRate) { if let heartRateQuantity = workoutBuilder.statistics(for: quantityType)?.mostRecentQuantity() { let heartRateUnit = HKUnit(from: "count/min") let heartRateValue = heartRateQuantity.doubleValue(for: heartRateUnit) print("heart rate: \(heartRateValue)") } } if quantityType == HKQuantityType.quantityType(forIdentifier: .heartRateVariabilitySDNN) { if let hrvQuantity = workoutBuilder.statistics(for: quantityType)?.mostRecentQuantity() { let hrvUnit = HKUnit.secondUnit(with: .milli) let hrvValue = hrvQuantity.doubleValue(for: hrvUnit) print("HRV: \(hrvValue)") } } if quantityType == HKQuantityType.quantityType(forIdentifier: .bodyTemperature) { if let bodyTempQuantity = workoutBuilder.statistics(for: quantityType)?.mostRecentQuantity() { let tempUnit = HKUnit.degreeCelsius() let tempValue = bodyTempQuantity.doubleValue(for: tempUnit) print("body temp: \(tempValue)") } } if quantityType == HKQuantityType.quantityType(forIdentifier: .respiratoryRate) { if let respRateQuantity = workoutBuilder.statistics(for: quantityType)?.mostRecentQuantity() { let respRateUnit = HKUnit(from: "count/min") let respRateValue = respRateQuantity.doubleValue(for: respRateUnit) print("breathing: \(respRateValue)") } } } } } }

When a workout session is being recovered, if it is paused, the elapsed time will be incorrect. It will seem like that workout never was paused. The recovery works fine if the workout was never paused. Steps to reproduce: Implement recoverActiveWorkoutSession Start workout Pause session and print the elapsed time Stop simulator / cause crash When recoverActiveWorkoutSession is called the elapsed time will not equal the elapsed time when the session was paused. Here is my implementation. I haven't seen any examples online. guard let recovered = try? await healthStore.recoverActiveWorkoutSession() else {return} self.session = recovered self.builder = recovered.associatedWorkoutBuilder() self.session?.delegate = self self.builder?.delegate = self self.builder?.dataSource = HKLiveWorkoutDataSource(healthStore: healthStore, workoutConfiguration: recovered.workoutConfiguration) self.sessionState = recovered.state