Sports Drinks: Who Needs Them?

This article is about the sports drinks. We have too much choice of neon-colored sports drinks and Americans spent over $5.4 billion on last year.
In this article, there are two different opinions. One is that sports drinks have little value to the average user. And the other is that sports drinks are healthy and safe, and have fewer calories than sodas and skim milks.
Do we need sports drinks or not?

Takashi