/**
  * Responds to GET::/workouts requests
  *
  * @return workouts.create view with exercises and units data
  */
 public function create()
 {
     $exercises = Exercise::orderBy('name')->get(['id', 'name', 'description', 'exercise_type']);
     $units = Unit::filteredUnits(['weight' => Unit::$unitMassType, 'distance' => Unit::$unitDistanceType]);
     return view('workouts.create')->with('exercises', $exercises)->with('units', $units);
 }