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Water - Why We Need To Drink 8 Glasses A Day

by: MariaEsposito
Total views: 14 | Word Count: 338

Usually about two and a half litres of water is needed each day for a reasonably sedentary adult to replace the total water loss that occurs through skin, lungs, faeces and urine, unless they are in an unusual environment.

To replace the water loss about 1 to 1.2 litres needs to be in drinks, (mainly water or cold herbal teas), 0.9 ml is taken though food and 0.3ml will be made by the body (oxidative metabolism).

What happens if you don't drink enough water?

1. Pulse rate and rectal temperature increases

2. Increase in respiration

3. Experience numbness and tingling in the fingers and toes

4. Increase in concentration of the blood

5. Diminution of blood volume and more difficult circulation

The difficulty and inadequacy of the circulation of blood under these conditions leads to:

1. difficulties in breathing

2. gastrointestinal upsets

3. nauseousness and loss of appetite

4. if it carries on for an extended period it will cause problems with muscle movement and unstable emotions

In an animal trial, restricted water intake led to irritablitiy and in some cases, bad temper.

Thirst

It has been demonstrated that under intense physical activity a male will only drink voluntarily around 50% as much water as what is required to replace losses from urine and sweat. Only after rest and food do the cravings for the required amount of water return to replace the fluid deficit.

Hot Drinks

Drinking hot liquids can cause a rise in internal body temperature. The body will sweat to bring the temperature down. In medical practice this is sometimes used as a deliberate ploy to temporarily raise body temperature or induce the body to sweat. So cool or cold liquids are preferred to hot ones to replace fluid losses. This is especially the case if hot drinks are always the preferred choice rather than cold ones.

Sugar drinks

During periods of physical activity that last under an hour and a half, water is the preferred choice. However drinks that contain a small amount of carbohydrate can sustain power better than water alone during activities that would create fatigue in an hour or longer.

About the Author

Maria has worked in alternative medicine as a nutritionalist and reflexologist. She is qualified in therapy massage and sports injury management. Her speciality is the treatment of allergies. She can be contacted at london nutritionist

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