I heard drinking about 3 or 4 liters of water a day can increase energy levels and help people quit smoking. Is there any negative effects of drinking this much water? Does drinking this much water increase energy levels? I read Arnold Swarsenager (my spelling is wrong) recommends 8 12 ounce glasses of water for bodybuilders who aren't competing and more for those that are. So I am guessing that it doesn't have to negative things that come along with it if you just do it for a short period of time.