diff --git a/Werkout_watch Watch App/WatchMainViewModel.swift b/Werkout_watch Watch App/WatchMainViewModel.swift
index 966e594..bb85951 100644
--- a/Werkout_watch Watch App/WatchMainViewModel.swift	
+++ b/Werkout_watch Watch App/WatchMainViewModel.swift	
@@ -177,11 +177,13 @@ extension WatchMainViewModel: HKWorkoutSessionDelegate, HKLiveWorkoutBuilderDele
             }
             switch quantityType {
             case HKQuantityType.quantityType(forIdentifier: .heartRate):
-                let statistics = workoutBuilder.statistics(for: quantityType)
-                let heartRateUnit = HKUnit.count().unitDivided(by: HKUnit.minute())
-                let value = statistics!.mostRecentQuantity()?.doubleValue(for: heartRateUnit)
-                heartValue = Int(Double(round(1 * value!) / 1))
-                print("[workoutBuilder] Heart Rate: \(String(describing: heartValue))")
+                DispatchQueue.main.async() {
+                    let statistics = workoutBuilder.statistics(for: quantityType)
+                    let heartRateUnit = HKUnit.count().unitDivided(by: HKUnit.minute())
+                    let value = statistics!.mostRecentQuantity()?.doubleValue(for: heartRateUnit)
+                    self.heartValue = Int(Double(round(1 * value!) / 1))
+                    print("[workoutBuilder] Heart Rate: \(String(describing: self.heartValue))")
+                }
             default:
                 return
             }