Monday, July 28, 2008

Our body Sweat ......

The body has a built in temperature regulator, and it function to keep our body temperature constantly on 36 to 37 degree Celsius. Our body perspiration increases in proportional to our body temperature as to keep our internal body temperature level.

Do you know that it is the vaporization of our sweat that ensures the cooling of our body and NOT the sweat secretion?Sweating cools the body - 4 ounces of sweat prevents a 1 degree rise in body temperature. Sweat consists mostly of water, but it also include other nutrients like sodium, chloride and potassium. Our sweat vaporization is influenced by external temperature (Ambient temperature), and the humidity of the air (amount of water vapor in a sample of air).

Sweat vaporization in warm and dry weather will cause cooling of our body sooner than in warm and wet weather. Our body temperature will also increases more in warm than in cool weather. An increment in body temperature will cause overheating, which can lead to heat cramps, heat exhaustion and heat stroke. Click here to find out more in heat sickness from my previous post.

Sweating is good for us as it cools our body, but it is also bad for us if we lose too much water. If our body fluid is not replaced, we will get dehydrated. Dehydration impairs our performance and increases risk of heart problems. One way to know whether we have sufficiently replaced lost fluids is to check our urine color and frequency. A good flow of clear or pale yellow urine is a good indication of sufficient fluids. Dark or reduced urine indicates the need to replace fluids.

Remember to drink plenty of fluids before, during and after a run.

Run to here to find out more in how sweats work.

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