public long addWorkout(Workout workout) {
   ContentValues values = new ContentValues();
   values.put(DatabaseHelper.FIELD_NAME, workout.getName());
   values.put(DatabaseHelper.FIELD_WORKOUT_DURATION, workout.getWorkoutDuration());
   values.put(DatabaseHelper.FIELD_REST_DURATION, workout.getRestDuration());
   values.put(DatabaseHelper.FIELD_REPETITIONS, workout.getRepetitions());
   values.put(DatabaseHelper.FIELD_ENABLED, workout.isEnabled() ? 1 : 0);
   return db.insert(DatabaseHelper.TABLE_WORKOUTS, null, values);
 }
 public void updateWorkout(Workout workout) {
   if (workout == null) return;
   ContentValues values = new ContentValues();
   values.put(DatabaseHelper.FIELD_NAME, workout.getName());
   values.put(DatabaseHelper.FIELD_WORKOUT_DURATION, workout.getWorkoutDuration());
   values.put(DatabaseHelper.FIELD_REST_DURATION, workout.getRestDuration());
   values.put(DatabaseHelper.FIELD_REPETITIONS, workout.getRepetitions());
   values.put(DatabaseHelper.FIELD_ENABLED, workout.isEnabled() ? 1 : 0);
   db.update(
       DatabaseHelper.TABLE_WORKOUTS,
       values,
       DatabaseHelper.FIELD_ID + "=" + workout.getId(),
       null);
 }