• Eat with food safety in mind. Nothing will slow down your athlete more than food poisoning – having stomach cramps, nausea, vomiting or diarrhea after eating. Make sure you store snacks at proper temperatures to prevent spoilage. Keep cheese, yogurt, meat, eggs and salads made with mayonnaise in a refrigerator or cooler. Shelf-stable items such as nuts, granola bars and whole fruit can be tossed into a sports bag without a problem.