Which position do you play? Are you someone who
uses speed and quickness or someone who
uses strength, or a goalie who uses agility and girth? And how old are you? If you're young, you don't want to do anything too rash. Basically, and this is very basic, for strength, you generally need protein, for energy and endurance you need complex carbohydrates, and for antioxidant protection you need electrolytes and lots of colored vegetables.