Most athlete, players & bodybuilders have a general complaint that they get nauseated or feel like that they ran out of energy while working out in the morning.
If eating a real meal 1- 1/2 hours before your workout is not feasible than drinking a pre-workout shake. It should deliver optimum calories which will keep you going longer and energetic with your regime.
Pre workout supplements are nutritionally balanced powders that contain protein, carbs, fats and even some fiber which are an array of vitamins and minerals in a balanced ratio. In short they are a complete package.
They get digested quickly, which make them ideal drink for pre workout. In pre-workout shakes, the carb source should be dextrose, maltodextrin or waxy maize. These are fast digesting carbohydrates. Fructose is not an ideal workout nutrition.
The protein source should be a fast digesting, preferably whey protein concentrate or isolate. Pre workout shakes should be enriched with prebiotic which improves gut function along with Omega 3 fatty acid & MUFA which help in reducing inflammation due to injuries and are also ergogenic (help to boost performance).