Ideally you want to ingest about 20 grams of protein and about 40 g of slow-burning carbs. At McDonald's, that's pretty easy. The Premium Grilled Chicken Classic Sandwich is basically a grilled chicken breast on a wheat bun — about as close to the ideal bodybuilding preworkout meal as you can get. Be sure to ask for the sandwich without mayo; fat slows digestion and absorption of both protein and carbs. Drink a large Diet Coke and you'll get about 120 milligrams of caffeine to power your workout.