diff --git a/PAWS/ECGRecordings/ECGModule.swift b/PAWS/ECGRecordings/ECGModule.swift
index 5f925dca..49b5e144 100644
--- a/PAWS/ECGRecordings/ECGModule.swift
+++ b/PAWS/ECGRecordings/ECGModule.swift
@@ -13,7 +13,6 @@ import Spezi
 @Observable
 class ECGModule: Module, DefaultInitializable, EnvironmentAccessible {
     var hkElectrocardiograms: [HKElectrocardiogram] = []
-    var vo2Samples: [HKQuantitySample] = []
     
     
     /// Creates an instance of a ``MockWebService``.
diff --git a/PAWS/ECGRecordings/ECGRecording.swift b/PAWS/ECGRecordings/ECGRecording.swift
index 015dcfd4..432b12d9 100644
--- a/PAWS/ECGRecordings/ECGRecording.swift
+++ b/PAWS/ECGRecordings/ECGRecording.swift
@@ -37,7 +37,6 @@ struct ECGRecording: View {
             }
             
             self.symptoms = symptoms
-            // manually query for active calories
         }
     }
 }
diff --git a/PAWS/PAWSStandard.swift b/PAWS/PAWSStandard.swift
index f7920bf9..51a5c347 100644
--- a/PAWS/PAWSStandard.swift
+++ b/PAWS/PAWSStandard.swift
@@ -70,9 +70,6 @@ actor PAWSStandard: Standard, EnvironmentAccessible, HealthKitConstraint, Onboar
     func add(sample: HKSample) async {
         if let hkElectrocardiogram = sample as? HKElectrocardiogram {
             ecgStorage.hkElectrocardiograms.append(hkElectrocardiogram)
-        } else if let vo2Sample = sample as? HKQuantitySample,
-                  vo2Sample.quantityType.identifier == HKQuantityTypeIdentifier.vo2Max.rawValue {
-            ecgStorage.vo2Samples.append(vo2Sample)
         }
         
         if let mockWebService {