# Workout Metadata Keys Constants that can be used to add metadata to workouts. ## Topics ### Workout Type [`let HKMetadataKeyActivityType: String`](/documentation/HealthKit/HKMetadataKeyActivityType) [`let HKMetadataKeyAppleFitnessPlusSession: String`](/documentation/HealthKit/HKMetadataKeyAppleFitnessPlusSession) [`let HKMetadataKeyCoachedWorkout: String`](/documentation/HealthKit/HKMetadataKeyCoachedWorkout) A key that indicates whether the workout was performed with a coach or personal trainer. [`let HKMetadataKeyGroupFitness: String`](/documentation/HealthKit/HKMetadataKeyGroupFitness) A key that indicates whether the workout was performed as part of a group fitness class. [`let HKMetadataKeyIndoorWorkout: String`](/documentation/HealthKit/HKMetadataKeyIndoorWorkout) A key that indicates whether the workout was performed indoors. [`let HKMetadataKeyWorkoutBrandName: String`](/documentation/HealthKit/HKMetadataKeyWorkoutBrandName) The brand name of a particular workout. ### Cycling [`let HKMetadataKeyCyclingFunctionalThresholdPowerTestType: String`](/documentation/HealthKit/HKMetadataKeyCyclingFunctionalThresholdPowerTestType) ### GymKit Fitness Equipment [`let HKMetadataKeyFitnessMachineDuration: String`](/documentation/HealthKit/HKMetadataKeyFitnessMachineDuration) The workout duration displayed by a connected GymKit fitness machine. [`let HKMetadataKeyCrossTrainerDistance: String`](/documentation/HealthKit/HKMetadataKeyCrossTrainerDistance) The workout distance displayed by a connected GymKit cross-trainer machine. [`let HKMetadataKeyIndoorBikeDistance: String`](/documentation/HealthKit/HKMetadataKeyIndoorBikeDistance) The workout distance displayed by a connected GymKit exercise bike. ### Intensity [`let HKMetadataKeyAverageMETs: String`](/documentation/HealthKit/HKMetadataKeyAverageMETs) A key that indicates the average Metabolic Equivalent of Task (METs) during a workout. [`let HKMetadataKeyPhysicalEffortEstimationType: String`](/documentation/HealthKit/HKMetadataKeyPhysicalEffortEstimationType) ### Skiing and Snowboarding [`let HKMetadataKeyAlpineSlopeGrade: String`](/documentation/HealthKit/HKMetadataKeyAlpineSlopeGrade) A key that indicates the percent slope of a ski run. [`let HKMetadataKeyElevationAscended: String`](/documentation/HealthKit/HKMetadataKeyElevationAscended) A key that indicates the cumulative elevation ascended during a workout. [`let HKMetadataKeyElevationDescended: String`](/documentation/HealthKit/HKMetadataKeyElevationDescended) A key that indicates the cumulative elevation descended during a workout. ### Speed [`let HKMetadataKeyAverageSpeed: String`](/documentation/HealthKit/HKMetadataKeyAverageSpeed) A key that indicates the average speed during a workout. [`let HKMetadataKeyMaximumSpeed: String`](/documentation/HealthKit/HKMetadataKeyMaximumSpeed) A key that indicates the maximum speed during a workout. ### Swimming [`let HKMetadataKeySwimmingLocationType: String`](/documentation/HealthKit/HKMetadataKeySwimmingLocationType) A key that indicates the location for a swimming workout. [`let HKMetadataKeySwimmingStrokeStyle: String`](/documentation/HealthKit/HKMetadataKeySwimmingStrokeStyle) A key that indicates the predominant stroke style for a lap of swimming. [`let HKMetadataKeyLapLength: String`](/documentation/HealthKit/HKMetadataKeyLapLength) A key that indicates the length of a lap during a workout. [`let HKMetadataKeySWOLFScore: String`](/documentation/HealthKit/HKMetadataKeySWOLFScore) [`let HKMetadataKeyWaterSalinity: String`](/documentation/HealthKit/HKMetadataKeyWaterSalinity) --- 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)