diff --git a/lib/providers/input_provider.dart b/lib/providers/input_provider.dart
index 3bd473f..b8aed63 100644
--- a/lib/providers/input_provider.dart
+++ b/lib/providers/input_provider.dart
@@ -4,12 +4,17 @@ import 'package:smoke_cess_app/models/relapse.dart';
 import 'package:smoke_cess_app/models/sleep.dart';
 import '../globals.dart' as globals;
 
+enum SleepTimes {
+  wokeUpAt,
+  sleptAt,
+}
+
 class InputProvider extends ChangeNotifier {
   double _sliderValue = 50;
   final TextEditingController _textController = TextEditingController(text: '');
-  final Map<String, TimeOfDay> _times = {
-    'wokeUpAt': const TimeOfDay(hour: 8, minute: 0),
-    'sleptAt': const TimeOfDay(hour: 22, minute: 0),
+  final Map<SleepTimes, TimeOfDay> _times = {
+    SleepTimes.wokeUpAt: const TimeOfDay(hour: 8, minute: 0),
+    SleepTimes.sleptAt: const TimeOfDay(hour: 22, minute: 0),
   };
   String relapseCategory = '';
 
@@ -21,11 +26,11 @@ class InputProvider extends ChangeNotifier {
     notifyListeners();
   }
 
-  TimeOfDay getTimeEntry(String key) {
+  TimeOfDay getTimeEntry(SleepTimes key) {
     return _times[key] ?? const TimeOfDay(hour: 12, minute: 0);
   }
 
-  void setTime(String key, TimeOfDay time) {
+  void setTime(SleepTimes key, TimeOfDay time) {
     _times[key] = time;
     notifyListeners();
   }
@@ -33,8 +38,8 @@ class InputProvider extends ChangeNotifier {
   void _resetFields() {
     _sliderValue = 50;
     _textController.text = '';
-    setTime('wokeUpAt', const TimeOfDay(hour: 8, minute: 0));
-    setTime('sleptAt', const TimeOfDay(hour: 22, minute: 0));
+    setTime(SleepTimes.wokeUpAt, const TimeOfDay(hour: 8, minute: 0));
+    setTime(SleepTimes.sleptAt, const TimeOfDay(hour: 22, minute: 0));
     notifyListeners();
   }
 
@@ -52,7 +57,7 @@ class InputProvider extends ChangeNotifier {
     return globals.databaseService.addRelapse(relapse);
   }
 
-  Future<int> saveSleep(String wokeUpKey, String sleptKey) {
+  Future<int> saveSleep(SleepTimes wokeUpKey, SleepTimes sleptKey) {
     Sleep sleep = Sleep(_sliderValue.toInt(), _textController.text,
         DateTime.now(), getTimeEntry(sleptKey), getTimeEntry(wokeUpKey));
     _resetFields();
diff --git a/lib/providers/workout_provider.dart b/lib/providers/workout_provider.dart
index 5d85c18..ebcaf9c 100644
--- a/lib/providers/workout_provider.dart
+++ b/lib/providers/workout_provider.dart
@@ -5,6 +5,13 @@ import 'package:smoke_cess_app/providers/audio_provider.dart';
 import 'package:smoke_cess_app/providers/timer_provider.dart';
 import '../globals.dart' as globals;
 
+enum WorkoutPhases {
+  warmUp,
+  highIntensity,
+  lowIntensity,
+  coolDown,
+}
+
 class WorkoutProvider extends ChangeNotifier {
   final TimerProvider timerProvider;
   final AudioProvider audioProvider;
@@ -15,21 +22,21 @@ class WorkoutProvider extends ChangeNotifier {
   int motivationAfter = 50;
 
   int _workoutPhaseIndex = 0;
-  final List<String> _workoutPhases = [
-    'Warm-Up',
-    'High Intensity',
-    'Low Intensity',
-    'High Intensity',
-    'Low Intensity',
-    'High Intensity',
-    'Low Intensity',
-    'High Intensity',
-    'Cool-down'
+  final List<WorkoutPhases> _workoutPhases = [
+    WorkoutPhases.warmUp,
+    WorkoutPhases.highIntensity,
+    WorkoutPhases.lowIntensity,
+    WorkoutPhases.highIntensity,
+    WorkoutPhases.lowIntensity,
+    WorkoutPhases.highIntensity,
+    WorkoutPhases.lowIntensity,
+    WorkoutPhases.highIntensity,
+    WorkoutPhases.coolDown,
   ];
 
   WorkoutProvider(this.timerProvider, this.audioProvider);
 
-  String get currentPhase => _workoutPhases[_workoutPhaseIndex];
+  WorkoutPhases get currentPhase => _workoutPhases[_workoutPhaseIndex];
   Duration get currentPhaseDuration =>
       _workoutPhaseSettings[currentPhase]!['duration'];
   bool get isPhaseComplete =>
@@ -37,6 +44,7 @@ class WorkoutProvider extends ChangeNotifier {
   Color get currentPhaseColor => _workoutPhaseSettings[currentPhase]!['color'];
   AssetSource get currentPhaseSource =>
       _workoutPhaseSettings[currentPhase]!['source'];
+  String get currentPhaseTitle => _workoutPhaseSettings[currentPhase]!['title'];
 
   void nextPhase() {
     if (_workoutPhaseIndex < _workoutPhases.length - 1) {
@@ -89,23 +97,27 @@ class WorkoutProvider extends ChangeNotifier {
   }
 }
 
-Map<String, Map<String, dynamic>> _workoutPhaseSettings = {
-  'Warm-Up': {
+Map<WorkoutPhases, Map<String, dynamic>> _workoutPhaseSettings = {
+  WorkoutPhases.warmUp: {
+    'title': 'Warm Up',
     'duration': const Duration(seconds: 5),
     'source': AssetSource('warmUp.mp3'),
     'color': Colors.green
   },
-  'High Intensity': {
+  WorkoutPhases.highIntensity: {
+    'title': 'High Intensity',
     'duration': const Duration(seconds: 4),
     'source': AssetSource('workout.mp3'),
     'color': Colors.red
   },
-  'Low Intensity': {
+  WorkoutPhases.lowIntensity: {
+    'title': 'Low Intensity',
     'duration': const Duration(seconds: 3),
     'source': AssetSource('workout.mp3'),
     'color': Colors.orange
   },
-  'Cool-down': {
+  WorkoutPhases.coolDown: {
+    'title': 'Cool Down',
     'duration': const Duration(seconds: 5),
     'source': AssetSource('cool_down.mp3'),
     'color': Colors.blue
diff --git a/lib/widgets/sleep_form.dart b/lib/widgets/sleep_form.dart
index ad033ba..4996da7 100644
--- a/lib/widgets/sleep_form.dart
+++ b/lib/widgets/sleep_form.dart
@@ -17,20 +17,18 @@ class SleepForm extends StatelessWidget {
   Widget build(BuildContext context) {
     InputProvider inputModel = context.watch<InputProvider>();
     TasksProvider tasksModel = context.watch<TasksProvider>();
-    String wokeUpKey = 'wokeUpAt';
-    String sleptKey = 'sleptAt';
 
     return Column(
       mainAxisAlignment: MainAxisAlignment.center,
       children: [
-        ElevatedCard(
+        const ElevatedCard(
           title: 'Einschlafzeit',
-          child: TimePicker(sleptKey),
+          child: TimePicker(SleepTimes.sleptAt),
         ),
         const SizedBox(height: 16),
-        ElevatedCard(
+        const ElevatedCard(
           title: 'Aufwachzeit',
-          child: TimePicker(wokeUpKey),
+          child: TimePicker(SleepTimes.wokeUpAt),
         ),
         const SizedBox(height: 16),
         const ElevatedCard(
@@ -46,7 +44,8 @@ class SleepForm extends StatelessWidget {
           height: 80,
         ),
         SubmitFormButton(
-          submitCallback: () => inputModel.saveSleep(wokeUpKey, sleptKey),
+          submitCallback: () =>
+              inputModel.saveSleep(SleepTimes.wokeUpAt, SleepTimes.sleptAt),
           updateTasks: () => tasksModel.setTaskDone(Pages.mood),
         )
       ],
diff --git a/lib/widgets/timepicker.dart b/lib/widgets/timepicker.dart
index 0b0926b..d6ab447 100644
--- a/lib/widgets/timepicker.dart
+++ b/lib/widgets/timepicker.dart
@@ -3,7 +3,7 @@ import 'package:smoke_cess_app/providers/input_provider.dart';
 import 'package:provider/provider.dart';
 
 class TimePicker extends StatelessWidget {
-  final String keyMap;
+  final SleepTimes keyMap;
 
   const TimePicker(this.keyMap, {super.key});
 
diff --git a/lib/widgets/workout_timer_widget.dart b/lib/widgets/workout_timer_widget.dart
index c47bbf5..4f1b64c 100644
--- a/lib/widgets/workout_timer_widget.dart
+++ b/lib/widgets/workout_timer_widget.dart
@@ -62,7 +62,7 @@ class WorkoutTimerWidget extends StatelessWidget {
     return Column(
       mainAxisAlignment: MainAxisAlignment.center,
       children: [
-        Text(workoutProvider.currentPhase),
+        Text(workoutProvider.currentPhaseTitle),
         const SizedBox(
           height: 20,
         ),