diff --git a/app/build.gradle b/app/build.gradle
index 9bc36ac..b2cb337b6 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -49,11 +49,11 @@ android {
 
         debug {
             // Comment out the below lines if you do not need to test resource shrinking
-            //minifyEnabled true
-            //shrinkResources true
-            //proguardFiles getDefaultProguardFile(
-            //        'proguard-android-optimize.txt'),
-            //        'proguard-rules.pro'
+            minifyEnabled true
+            shrinkResources true
+            proguardFiles getDefaultProguardFile(
+                    'proguard-android-optimize.txt'),
+                    'proguard-rules.pro'
         }
 
     }
diff --git a/app/src/main/java/org/y20k/trackbook/TrackerService.kt b/app/src/main/java/org/y20k/trackbook/TrackerService.kt
index 924cff7..46f6148 100644
--- a/app/src/main/java/org/y20k/trackbook/TrackerService.kt
+++ b/app/src/main/java/org/y20k/trackbook/TrackerService.kt
@@ -213,6 +213,9 @@ class TrackerService(): Service(), CoroutineScope, SensorEventListener {
             val lastWayPointIndex = track.wayPoints.size - 1
             track.wayPoints.get(lastWayPointIndex).isStopOver = true
         }
+        // calculate length of recording break
+        track.recordingPaused = TrackHelper.calculateRecordingPaused(track.recordingStop)
+        LogHelper.e(TAG, "We took a break for ${DateTimeHelper.convertToReadableTime(this, track.recordingPaused)}") // todo remove
         // start tracking
         startTracking(newTrack = false)
     }
diff --git a/app/src/main/java/org/y20k/trackbook/core/Track.kt b/app/src/main/java/org/y20k/trackbook/core/Track.kt
index 7c566bd..361911b 100644
--- a/app/src/main/java/org/y20k/trackbook/core/Track.kt
+++ b/app/src/main/java/org/y20k/trackbook/core/Track.kt
@@ -36,6 +36,7 @@ data class Track (@Expose var trackFormatVersion: Int = Keys.CURRENT_TRACK_FORMA
                   @Expose val wayPoints: MutableList<WayPoint> = mutableListOf<WayPoint>(),
                   @Expose var length: Float = 0f,
                   @Expose var duration: Long = 0L,
+                  @Expose var recordingPaused: Long = 0L,
                   @Expose var stepCount: Float = 0f,
                   @Expose var recordingStart: Date = GregorianCalendar.getInstance().time,
                   @Expose var recordingStop: Date = recordingStart,
diff --git a/app/src/main/java/org/y20k/trackbook/helpers/TrackHelper.kt b/app/src/main/java/org/y20k/trackbook/helpers/TrackHelper.kt
index 00d073f..e5c14d2 100644
--- a/app/src/main/java/org/y20k/trackbook/helpers/TrackHelper.kt
+++ b/app/src/main/java/org/y20k/trackbook/helpers/TrackHelper.kt
@@ -35,15 +35,13 @@ object TrackHelper {
 
 
     /* Returns unique ID for Track - currently the start date */
-    fun getTrackId(track: Track): Long {
-        return track.recordingStart.time
-    }
+    fun getTrackId(track: Track): Long =
+        track.recordingStart.time
 
 
     /* Returns unique ID for TracklistElement - currently the start date */
-    fun getTrackId(tracklistElement: TracklistElement): Long {
-        return tracklistElement.date.time
-    }
+    fun getTrackId(tracklistElement: TracklistElement): Long =
+        tracklistElement.date.time
 
 
     /* Adds given locatiom as waypoint to track */
@@ -120,6 +118,11 @@ object TrackHelper {
     }
 
 
+    /* Calculates time passed since last stop of recording */
+    fun calculateRecordingPaused(recordingStop: Date): Long =
+        GregorianCalendar.getInstance().time.time - recordingStop.time
+
+
     /* Creates GPX string for given track */
     fun createGpxString(track: Track): String {
         var gpxString: String