When it comes to apparel for running — either short-distance sprints or long-distance marathons — I'd argue picking the right shorts is crucial. Think about it: they have to be both comfortable and functional around a pretty crucial area of the body for optimal movement.
I know what I need in a pair of shorts. That's to be comfortable (nobody wants chafing) as well as have pockets for my gloves, gels, or keys for the times when I don't want to pull on one of the best running belts.
