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Your Body _ Heat - Heat Index and How Heat Affects The Human Body

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Your Body _ Heat - Heat Index and How Heat Affects The Human Body Powered By Docstoc
					 Heat Index and How Heat Affects The Human Body
Heat affects everyone’s performance and overall health, whether they encounter
it at work in a factory, driving a race car, playing sports or at home working in the
yard. COOL SHIRT™ has been in the medical field for over 10 years keeping
surgeons cool in the operating room. As such, we understand the human body
from a medical standpoint and we know the proper way to keep the body cool.
Our products were designed utilizing NASA-study guidelines and, simply put, are
the best personal cooling systems available anywhere.

Each year thousands of Americans suffer from heat exhaustion and heat stroke.
Our bodies dissipate heat four different ways. Here is what they are and how
each of them work:

RADIATION (60 – 65%)

   •   Radiation is when the air temp is lower than your skin temperature

EVAPORATION (25%)

   •   Evaporation is the release of perspiration thru the sweat glands on the
       skin surface

CONVECTION (10 – 15%)

   •   Convection is heat loss to air and to water vapor around your body which
       must be lower than your skin temperature.

CONDUCTION (2%)

   •   Conduction is the transfer of heat from warmer to cooler objects by direct
       contact.

When the heat index is above 95 you can no longer loose body heat by radiation,
convection or conduction because the index is above your average skin
temperature of 91.4. The only way left to reduce body heat is with evaporation
and in a hot environment it is not enough. When you use the COOL SHIRT™
you help maintain your core body temperature by using radiation, evaporation,
convection and conduction because something is cooler on your skin (50 to 65
degree cool water). The shirt also slows down your perspiration rate thereby
slowing your dehydration rate and heart rate.
Here’s a few other interesting facts about heat and cooling the
human body:

When you start to sweat, the blood in your body rushes to your skin to make it
damp, thereby trying to cool you so your core temperature doesn’t rise. An
interesting fact here is that there is only so much blood in your body and it is
being pulled away from your vital organs and muscles (including your brain) while
this is happening. As a result, it can adversely affect your concentration and
decision-making abilities. In 1968, a NASA study concluded that when the air
temperature is over 95 degrees, you can make up to 60 mistakes per hour. Think
about that for a minute.

   •   A 2500 calorie/day diet can raise the core temperature of a 200 pound
       man 50 degrees. Your body MUST disperse heat before it causes heat
       exhaustion, heat stroke or even death.
   •   Cool water transfers body heat 28 times faster than cold air.
   •   In order to cool the human body, you must cool the blood by contacting at
       least 30% or more of the skin surface with cool water, not ice water.
   •   Using cold air on your head or an ice cold towel on the back of your neck
       is only sending perceived cooling input to your brain from your
       hypothalamus gland. This is not truly reducing your core body
       temperature.

Take a moment to study the HEAT INDEX CHARTS on the next page showing
the affects of heat and humidity together and their dangerous affect on the body.
When considering the charts, please note that if you are standing in direct
sun or wearing dark or protective clothing, add 15 degrees to the heat
index reading.

Examples:
RACE CAR DRIVER
   • Outside air temp is 90 degrees, temp inside the car is 100 degrees
   • Humidity of 50% gives a reading of 118 degrees
   • ADD 15 degrees for driver suit
   • Heat index reading is now 133 degrees

FOOTBALL PLAYER
  • Temperature on the field is 90 degrees
  • Humidity of 60% gives a chart reading of 99 degrees
  • ADD 15 degrees for protective clothing and pads
  • Heat index reading is now 114 degrees

INDUSTRIAL WORKER CLEANING OVEN ROLLERS IN A PAPER MILL
   • Area temperature 130 degrees
   • Humidity of 50% gives an off the chart reading of 150+degrees
               HEAT INDEX CHART
   ILLUSTRATING THE DANGERS OF HEAT-INDUCED
                    FATIGUE




If you are standing in direct sun or wearing dark or protective clothing, add 15
                      degrees to the heat index reading.




WHAT AFFECT DOES CORE TEMPERATURE
     HAVE ON THE HUMAN BODY?
                 CORE TEMPERATURE RANGES

     98 to 99 degrees  NORMAL
    99 to 103 degrees  HEAT EXHAUSTION
   103 to 110 degrees HEAT STROKE
   110 to 114 degrees DEATH

				
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posted:8/10/2010
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