So it sounds like the sugars are the culprit? I usually use a sports drink (Cytomax) and a sugar free electrolyte (NUUN). I'm generally fine for anything thats short, but I do a 105 mile road race every year and I've found I tend to get nausea and a feeling I don't want to/can't eat at around mile 75-90. From what I'm reading here, I may need to back off on the Cytomax and hit the NUUN harder. Do you think I need to put more plain water in there too or the electrolytes without the sugar are OK?