Water is not going to do the job. You need an electrolyte replacement drink, such as Smart Water, Vitamin Water, etc. - available in grocery stores. And you need to read the label to ensure that you are getting electrolytes. Sports drinks such as gatorade or powerade also contain electrolytes, but they have a despicable taste, in my opinion. Vitamin Water is available in a range of flavors, such of them quite nice, and Smart Water tastes just like plain water.