I'm 6'6" and about 76kg. Been attempting to build muscle for over a 2 years. I think I have a high metabolism. I am not sure how good or bad sports drinks are or using simple carbs to increase my caloric intake is. I went a couple of weeks drinking only coconut water or real juice or water. I think that complex carbs are better in general. I was concerned about the simple sugars having a negative effect on my testosterone, but in fact, I don't know if white sugar is any worse for that than the sugars in fruits/real juice. Anyways, I want to know what the effect of having a sports (electrolyte) or vitamin water during or after my workouts will be like. I always have a protein shake after a workout, but I guess I mean during, and at other times of the day when I'm out and about and real juice may not be available. I feel the calories are important for me and would be better than water. Is sugar really so bad?