diff --git a/app/src/main/java/de/tadris/fitness/activity/ShowWorkoutActivity.java b/app/src/main/java/de/tadris/fitness/activity/ShowWorkoutActivity.java
index d336847..f23df0e 100644
--- a/app/src/main/java/de/tadris/fitness/activity/ShowWorkoutActivity.java
+++ b/app/src/main/java/de/tadris/fitness/activity/ShowWorkoutActivity.java
@@ -82,34 +82,43 @@ public class ShowWorkoutActivity extends WorkoutActivity implements DialogUtils.
 
         addKeyValue(getString(R.string.workoutDistance), UnitUtils.getDistance(workout.length), getString(R.string.workoutPace), UnitUtils.getPace(workout.avgPace));
 
-        addTitle(getString(R.string.workoutRoute));
+        if (hasSamples()) {
+            addTitle(getString(R.string.workoutRoute));
 
-        addMap();
+            addMap();
+
+            map.setClickable(false);
+            mapRoot.setOnClickListener(v -> startActivity(new Intent(ShowWorkoutActivity.this, ShowWorkoutMapActivity.class)));
+
+        }
 
-        map.setClickable(false);
-        mapRoot.setOnClickListener(v -> startActivity(new Intent(ShowWorkoutActivity.this, ShowWorkoutMapActivity.class)));
 
         addTitle(getString(R.string.workoutSpeed));
 
         addKeyValue(getString(R.string.workoutAvgSpeedShort), UnitUtils.getSpeed(workout.avgSpeed),
                 getString(R.string.workoutTopSpeed), UnitUtils.getSpeed(workout.topSpeed));
 
-        addSpeedDiagram();
+        if (hasSamples()) {
 
-        speedDiagram.setOnClickListener(v -> startDiagramActivity(ShowWorkoutMapDiagramActivity.DIAGRAM_TYPE_SPEED));
+            addSpeedDiagram();
+
+            speedDiagram.setOnClickListener(v -> startDiagramActivity(ShowWorkoutMapDiagramActivity.DIAGRAM_TYPE_SPEED));
+        }
 
         addTitle(getString(R.string.workoutBurnedEnergy));
         addKeyValue(getString(R.string.workoutTotalEnergy), workout.calorie + " kcal",
                 getString(R.string.workoutEnergyConsumption), UnitUtils.getRelativeEnergyConsumption((double)workout.calorie / ((double)workout.length / 1000)));
 
-        addTitle(getString(R.string.height));
+        if (hasSamples()) {
+            addTitle(getString(R.string.height));
 
-        addKeyValue(getString(R.string.workoutAscent), UnitUtils.getDistance((int)workout.ascent),
-                getString(R.string.workoutDescent), UnitUtils.getDistance((int)workout.descent));
+            addKeyValue(getString(R.string.workoutAscent), UnitUtils.getDistance((int) workout.ascent),
+                    getString(R.string.workoutDescent), UnitUtils.getDistance((int) workout.descent));
 
-        addHeightDiagram();
+            addHeightDiagram();
 
-        heightDiagram.setOnClickListener(v -> startDiagramActivity(ShowWorkoutMapDiagramActivity.DIAGRAM_TYPE_HEIGHT));
+            heightDiagram.setOnClickListener(v -> startDiagramActivity(ShowWorkoutMapDiagramActivity.DIAGRAM_TYPE_HEIGHT));
+        }
 
 
     }
diff --git a/app/src/main/java/de/tadris/fitness/activity/WorkoutActivity.java b/app/src/main/java/de/tadris/fitness/activity/WorkoutActivity.java
index 3bb2e2d..ba15a6b 100644
--- a/app/src/main/java/de/tadris/fitness/activity/WorkoutActivity.java
+++ b/app/src/main/java/de/tadris/fitness/activity/WorkoutActivity.java
@@ -297,9 +297,15 @@ public abstract class WorkoutActivity extends FitoTrackActivity {
         return getWindowManager().getDefaultDisplay().getWidth()*3/4;
     }
 
+    protected boolean hasSamples() {
+        return samples.size() > 1;
+    }
+
     @Override
     protected void onDestroy() {
-        map.destroyAll();
+        if (map != null) {
+            map.destroyAll();
+        }
         AndroidGraphicFactory.clearResourceMemoryCache();
         super.onDestroy();
     }
@@ -307,12 +313,16 @@ public abstract class WorkoutActivity extends FitoTrackActivity {
     @Override
     public void onPause(){
         super.onPause();
-        downloadLayer.onPause();
+        if (downloadLayer != null) {
+            downloadLayer.onPause();
+        }
     }
 
     public void onResume(){
         super.onResume();
-        downloadLayer.onResume();
+        if (downloadLayer != null) {
+            downloadLayer.onResume();
+        }
     }
 
     @Override