| TRIVIA | PADDLERS' PICS | SHOP | ABOUT | LINKS
You're out there on the water and you're working hard! Please read the following info
that Kayak Jam compiled to help you stay strong, healthy and at your peak
Dehydration is the loss of water from the body that occurs during respiration (breathing) or the body's attempts to cool itself by perspiration (sweating).
Perspiration is the most frequent cause of dehydration but respiration can be a
significant factor in cold dry climates. In warm humid conditions, the loss is most obvious as the sweat is visible
and voluminous. But in dry conditions, the loss of water can be as much even though the skin stays
completely dry as the sweat evaporates in the dry air.
With exercise, the muscles create many times more heat than when resting.
This heat must be dissipated in order to keep the body chemistry working properly.
Sweating moistens the skin and allows evaporation to cool the blood
in the capillaries just under the sub-dermal fat layer. (The same ones affected by cold shock)
The capillaries expand and more blood is sent to the capillaries in order to assist
in the heat transfer and cooling process.
Water is removed from the blood and the blood actually becomes thicker
if this water is not replaced. This makes your heart pump harder to move
the sludge around in your arteries and veins. A loss of 2% of your body weight
will cause this loss of performance. At higher levels of water loss,
you can experience additional problems as described below.
Some people think that most water is lost through the urinary system,
but in fact the kidneys can make adjustments
to greatly reduce the amount of water loss. The kidney's function is to remove
the by products of combustion in your muscles.
These waste products are carried by the blood to the kidneys where they are filtered out.
If the blood is low on water, the kidneys do not remove much water from the
blood and the concentration of waste products to water goes up. Thus the frequency,
amount and color of urination is a great indicator of the hydration of your blood.
If the amount of urine as near normal and the color is clear or slightly yellow,
then all is well. The darker the yellow and the smaller the amount the more dehydrated
you are. If you can only squeeze out a few ounces of brown urine,
you are severely and dangerously dehydrated.
Water loss during exercise can range from 1 to 3 liters per hour.
One liter of water weighs 1 Kilogram (2.2 pounds). A 200 pound man loses 1% to 3% of
his weight per hour. That means that a during heavy exercise or
extremely hot conditions, dehydration can be causing performance problems in
just 30 minutes and a serious situation can develop in less than two hours.
Treatment for minor dehydration is to drink water!
And we're not talking about water bottles.
CHOOSE YOUR WATER BOTTLES CAREFULLY.
Bottled water is a drain on the environment:
The U.S. public goes through about 50 billion water bottles a year,
and most of those plastic containers are not recycled, (Check out the great Pacific Garbage Patch)
Not only does bottled water contribute to excessive waste, but it costs us a thousand times
more than water from our faucet at home, and it's likely no safer or cleaner,
experts say. A 2008 investigation by the nonprofit Environmental Working Group
found some bottled water is sullied with untested industrial chemicals and may not
necessarily be cleaner than tap water.
Water aside, the plastic used in single-use bottles can pose more of a contamination threat
than the water. A safe plastic if used only once, #1 polyethylene terephthalate
(PET or PETE) is the most common resin used in disposable bottles.
However, as #1 bottles are reused, as they commonly are, they can leach chemicals such as
DEHA, a possible human carcinogen, and benzyl butyl phthalate (BBP),
a potential hormone disruptor. And because the plastic is porous, you'll likely get a swill
of harmful bacteria with each gulp if you reuse the bottles.
Another major problem with bottled water, according to Columbia, is that a traditionally
public good has been privatized. Bottled water companies gain high profits by drawing
water from public water sources, putting it in plastic containers, and reselling it at
2,900 times the price of regular tap. Some experts contend that the profits from bottled water
companies could go toward improving public water supplies and infrastructure—
making better water for everyone.