 Dehydration occurs when you fail to consume enough water. This can lead to fatigue, changing body temperatures, heat exhaustion or heat stroke. Physical performance in exercise is greatly diminished as water loss increases. Always hydrate before and after working out. Since thirst is a poor indicator of dehydration you may already be dehydrated by the time you feel thirsty. A good goal to keep in mind: drink between 6-8 glasses of water per day. If you are extremely physically active or exercise regularly try to drink more. To maintain hydration levels follow this guideline: for every cup of coffee or tea consumed drink one glass of water; for every glass of wine drink 2 glasses of water.
some content from: Harcourt Learning Direct
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