# predicateForWorkoutActivities(operatorType:duration:) Returns a predicate for matching workout activities based on their duration. ``` class func predicateForWorkoutActivities(operatorType: NSComparisonPredicate.Operator, duration: TimeInterval) -> NSPredicate ``` ## Parameters `operatorType` The operator type to use when comparing the duration. `duration` The target duration. ## Return Value A predicate for matching workout activities based on their duration. This predicate works only on workout activities. ## Discussion Use this convenience method to create a predicate that matches against an activity’s duration. To use this predicate, call [`predicateForWorkouts(activityPredicate:)`](/documentation/HealthKit/HKQuery/predicateForWorkouts(activityPredicate:)) to wrap this predicate inside a workout predicate. You can then use the workout predicate in your query. The following sample creates a predicate for matching workout activities with a duration of 30 minutes or longer. ```swift let longWorkoutActivityPredicate = HKQuery.predicateForWorkoutActivities(operatorType: .greaterThanOrEqualTo, duration: 60.0 * 30.0) // Wrap the activity predicate inside a workout predicate. let workoutPredicate = HKQuery.predicateForWorkouts(activityPredicate: longWorkoutActivityPredicate) ``` ## See Also [`let HKPredicateKeyPathWorkoutDuration: String`](/documentation/HealthKit/HKPredicateKeyPathWorkoutDuration) The key path for accessing the workout’s duration. [`var duration: TimeInterval`](/documentation/HealthKit/HKWorkout/duration) The workout’s duration. --- 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)