If you need potassium and carbohydrates -- and we all do, especially people exercising in extreme conditions -- then bananas can meet that need. The nutrition provided by bananas makes them one of the very best options for exercisers, whether it's a before or after workout food [source: Snyder]. Its handiness is often overlooked. What food, in its original form, comes with a covering that allows you to eat a little at a time without even getting your hands messy? Just be careful not to throw the peel in the path of a trailing cyclist or runner.
Our next food is also quite handy, but it doesn't grow in the wild.