Here's John Berardi's take on sugar water (Gatorade).
http://www.johnberardi.com/articles/nut ... rition.htm
He doesn't even mention teh electrolytes so the main benefit comes from the water and calories. His major beef with it is the lack of protein.
Here's his advice for Endomorphs:
Second, if you’re an athlete who naturally has more of an endomorphic body type and tends to gain weight easily or tends to gain fat during competition periods (World Cups, etc) when eating a higher carbohydrate diet, you’ll want to half the recommendation above by ingesting 30g carbohydrate and 15g protein for every 2 hours of training. Therefore you’d be averaging 15g carbohydrate and 7.5g protein for every hour of training.
In addition to this, you’d add BCAA(branched chain amino acids) into your workout drink at a rate of 5g BCAA per hour of training. Therefore you’d end up with 15g carbohydrate, 7.5g protein, and 5g BCAA for every hour of training.
Note that these recomendations are to support performance, not to encourage fat loss. At the very least, if you're going to drink Gatorade, cut it in half with water and add a scoop of protein. You'll save money that way and still get a performance boost while minimizing fat gain.
I like Peter's drink idea better.