What is the best pre workout juice to drink? Beetroot juice Beets are frequently touted as the best whole food you can consume for a preworkout. What are the best pre-workout foods? Pre-Workout Foods 1 Bananas. 2 Chicken, Rice & Vegetables. 3 Protein Bar. 4 Porridge and Oatmeal. 5 Fruit Smoothies. 6 ……