When it comes to drinking water, you’ve probably heard the 8×8 rule or eight 8-ounce glasses (about half a gallon) each day. Unfortunately, there is no science behind this rule. Although it’s fine as a general guide, ultimately, the right amount depends on you.  Factors Impacting How Much Water You Need   Your Gender – Men need more water than women due to their higher water weight percentage.  The Weather – Hot, humid weather makes you sweat and therefore…