|08-09-2005, 02:55 PM||#1|
More info that you probably need about sweating like a pig, but found this article in the paper and thought I'd pass it along.
SUMMER PRESENTS SWEATY SITUATION
10:19 AM PDT on Tuesday, August 9, 2005
By CYNTHIA BILLHARTZ / St. Louis Post-Dispatch
Go outside on a steamy summer day, walk a block and voila! You're dripping like a can of cola just pulled from an ice chest.
Sweat helps regulate body temperature, but few of us give sweat more than a passing thought.
Here are answers to some of the questions you may have about sweat.
Ever feel like a human salt lick after exercising? That's because sweat is composed primarily of water, potassium and salt (a mix of sodium and chloride), as well as minuscule amounts of a few other things. The ratio of those components varies from person to person, and your body adjusts that ratio depending on the fluctuation of its levels of water, potassium and salt.
The average person has 2.6 million sweat glands in his or her skin.
We have two types of sweat glands: eccrine, which produce volumes of the watery stuff, and apocrine, which produce tiny amounts of thick odorless fluid.
We have eccrine glands all over our bodies, including the palms of our hands, the soles of our feet and our foreheads.
We have apocrine glands under our arms and in the genital area. Breasts have a modified version of the apocrine gland. When the thick odorless fluid from our apocrine glands sits on our skin, bacteria act upon it, which is what makes us smell.
Apocrine glands contain proteins and fatty acids, making their secretions thicker and giving them a milky or yellowish color. That's why underarm stains in clothing appear yellowish.
Apocrine glands develop during puberty, which is why children don't need deodorant or antiperspirant.
Men tend to produce more sweat than women.
Ever wonder why you can't handle hot days in the spring as well as you can in late summer? It seems that your sweat glands need time to acclimate. A person who hasn't been in a hot climate for a while can produce about one liter of sweat an hour. After about six weeks of hot weather, however, he or she will be able to produce two to three times that amount. (Anecdotal evidence suggests that people who sweat a lot while exercising year-round are automatically acclimated in the spring and thus able to handle the heat better.)
About 3 percent of the population suffers from hyper-hidrosis (excessive sweating). It most commonly affects underarms, hands and feet and can mysteriously strike in the coldest of conditions.
We are constantly sweating, even though we may not notice it.
Losing excessive amounts of sweat can quickly dehydrate you, leading to circulatory problems, kidney failure and heat stroke.
Never wear a plastic sweatsuit or lots of warm clothing while working out on a hot day. You won't burn any more calories, but you will lose lots of water weight, which can precipitate heat stroke.
People who are more fit are better able to cope with low or even moderate degrees of dehydration than those who aren't fit. Alberto Salazar finished the 1984 Olympic Marathon in 2 hours 14 minutes despite losing 8.1 percent of his body weight in sweat.
The Gatorade Sports Science Institute has found that in conditions of 85 degrees and 40 percent humidity, the average runner will lose two to four pounds of sweat an hour.
An hour or two before exerting yourself outdoors in the heat, drink 16 ounces of water or sports drink, then take in between 5 and 12 ounces every 15 to 20 minutes while working or exercising, says Runner's World magazine.
Americans spend more than $1 billion a year on antiperspirants and deodorants. Anti-microbials in deodorant help eliminate bacteria on your skin's surface, while fragrance helps mask odor.
Sources: Howstuffworks.com; Dr. Susan Mallory, a professor of dermatology and pediatrics at Washington University; the Chicago Tribune; Runner's World magazine
Online at: http://www.pe.com/lifestyles/stories....10707bf1.html
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