Many people understand that when a person sweats those fluids need to be replaced for the body to function properly. However fluid intake should not only happen during exercise, but it should happen before and after a workout as well. 
Before a workout it is adequate to consume between 17-20 ounces of fluid around two hours in advance and then another 8 ounces 20-30 minutes before. During the workout it is optimal to consume 7-10 ounces of fluid, preferably with some carbohydrate component, every 20 minutes. After a workout it is best to weigh yourself and then consume between 16 and 24 ounces of fluids per pound lost during the workout. Weight that is lost during exercise is simply fluid loss, and it needs to replaced so the body can function properly. Following these general guidelines for fluid consumption throughout exercise will allow the body to preform optimally. 
Dehydration impacts performance greatly, and increases the risk of injury especially during exercise. A mere 1% in body weight can increase cardiovascular strain and limit the body's ability to transfer heat from the working muscles to the skin. This increases the risk for a heat related injury and hinders performance. Drinking fluids with low sugar content will be easily and quickly absorbed in the body, keeping it hydrated. 

Making sure that you are getting proper fluids throughout the day is extremely important, and when exercise comes into play, this further increases the need to hydrate adequately. So grab the nearest water fountain and fill up a bottle for that killer workout! Besides, you don't want to put in all that work in the gym just to feel tired and lethargic. Drink proper fluids so that your body can preform optimally and you do not end up with an injury! 

            People often turn to water during the point of their night when they start to feel they or their friend has had a little too much to drink. Ordering a tall glass of ice water to help sober up, however this idea that water will help the sobering process is merely a myth. The only thing that aid this sobering process is time for the kidneys to filter out the alcohol. Hydration does play an important role when a person is consuming alcohol. When alcohol is consumed, it enters the bloodstream and causes the pituitary gland in the brain to block the creation of vasopressin. When vasopressin is blocked, the kidneys send water straight to the bladder rather than reabsorbing it into the body.  Due to this a person who consumes about 250 milliliters of alcohol for example would excrete between 800 and 1000 milliters of urine. As the blood alcohol concentration decreases, this diuretic effect decreases as well. However it leaves the body very dehydrated and the aftereffects help create hangovers.
            When a person is frequently urinating such as when they are consuming alcohol, their body excretes potassium and salts. When these levels get too low a person will experience headaches, fatigue and nausea. Alcohol also breaks down the body's glycogen stores in the liver, converting it into glucose and excrete it out in the urine. Since glucose is a major energy source for the body, low levels result in weakness, fatigue and decreased coordination. 
            So how does hydration fit into play? Properly hydrating throughout a night of drinking will prevent the body from becoming severely dehydrated the next morning. Although your body will excrete a lot of the water in the urine, continuing to drink non alcoholic fluids throughout and after you are finishing drinking will help lessen these symptoms in the morning. Drinking one beverage per hour is recommended by many for safe and smart alcohol consumption, as well as mixing in water during the night. 

Each and everyday we are bombarded with advertisements for colas, sports drinks, coffees and energy drinks. But what happened to just plain water? The push for consumption of these beverages has increased total calorie and sugar intake. Research shows that people will consume the same amount of food whether they are drinking water or a 150 cal soda, so why add on those empty calories? I am not saying you need to eliminate all beverages that are not water, however these drinks should be consumed in moderation. 

Think before you drink; is this beverage benefitting my body in any way? For example when asking this question before drinking a tall glass of skim milk, your mind will be able to answer this question 'yes' because of its calcium content. Is the beverage you are about to consume high in sugar and calories? Does it contain a significant source of vitamins/minerals? 

Beverages that are good hydration sources include water, herbal tea's and fruit/vegetable juices. Coffee, sodas and alcoholic beverages are not good hydration sources and should be limited. Coffee contain purines which are a toxin and require a large amount of water when being excreted so no irritation is caused. Most of the water found in coffee is used to dilute these toxins and therefore only a small amount is left over for hydration. Soft drinks often have a high caffeine base, which makes a body lose water before it has time to make its way into the intracellular environment. The high sugar content of most sodas gives the body a hard time properly metabolizing it, causing the body to surrender water from the extracellular fluid.This makes a person thirsty and a vicious circle is created.

See yourself, here is some facts about popular beverages:

Pepsi
13 teaspoons of added sugars (208 calories from added sugars)

Canada Dry Ginger Ale
11 teaspoons of added sugars (176 calories from added sugars)

Hi-C Orange Lavaburst
10 teaspoons of added sugars (160 calories from added sugars)

McDonald’s Sweet Tea
9 teaspoons of added sugars (144 calories from added sugars)

Fruit-Flavored Gatorade
6 teaspoons of added sugars (96 calories from added sugars)