public ActionResult AddCardioExercise(int exerciseID, int workoutID, int duration, int intensity)
        {
            bool success = _workoutDal.AddCardioToWorkout(new CardioExercise()
            {
                Duration = duration, Intensity = intensity, ExerciseID = exerciseID, WorkoutID = workoutID
            });
            Workout wo = new Workout();

            wo.GetBig          = _workoutDal.GetStrengthExercises(workoutID);
            wo.RunningAndStuff = _workoutDal.GetCardioExercises(workoutID);
            return(Json(wo, JsonRequestBehavior.AllowGet));
        }