I think the sucrose in the better drinks isn't the same as refined sugar. It has a lower glycemic index and is processed by the body differently. Also, you don't need anything unless yo are doing cardio for more than an hour. At that point, water isn't enough. Ride a bike for 50-plus miles and you'll see. Not needed, of course, with lifting.
Also, pretty much any excercise requires some sort of recovery meal within 45 minutes of excercise, best in a 4:1 carb/protein ratio. A lot of that stuff has some sucrose - like Endurox:
Extends endurance by 55%
Decreases post-exercise muscle damage by 36%, reduces free radical build-up by 69%
Increases insulin levels by 70% to speed the replenishment of muscle glycogen and the rebuilding of protein
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