Water is the most popular drink during exercise, but do sports drinks do a better job of hydration? Check out this article by Matt Fitzgerald for Active.com.
I found it especially interesting—and I believe accurate—that he mentions that sports drinks containing a small amount of protein may hydrate better than conventional sports drinks. During my run across America in 2008, the only drink I carried with me, at all times, was Muscle Milk, which includes protein. My crew mixed the Muscle Milk with whole milk and, often, some kind of coffee drink; yes, with caffeine… but that’s another posting. I also had to take electrolyte tablets (Sustain ordered from Zee Medical) in addition to all of the fluids I drank, but that’s another posting, too!