I attend two aerobic classes - one is body conditioning and the sweat pours off me. Both classes last for 55 mins. About 45 mins into the class I feel slightly faint (even if working on the floor). I do drink water throughout the class. However I think I need to replace the electrolytes. Any suggestions as to what is suitable for diabetics without being too expensive? I was considering trying Diorlyte rehydration sachets. Should I take two bottles on with water and the other with rehydration solution? Any suggestions please?