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At Last - Hands Free Kayaking Using Foot Pedals
Hobie Cat's new Mirage kayak turns the kayaking world on its
head with a system that keeps boaters' hands free. The new
technology is sure to change how people look at kayaking.
Hobie Cat is one of the world's top kayak makers. The...
Football 101 – A Girl’s Guide To Football – Why The Game Matters
Can I tell you how tired I am of single women complaining about how hard it is to meet a decent man? The problem is not a dearth of quality men, in fact I know quite a few single gems, but rather where the ladies are looking. You aren’t going to...
Outdoor Gear For Your Favorite Activities
If you love the great outdoors, then you know that there are many activities out there for you to enjoy. Of course, you probably also know that for each outdoor adventure, you will need different kinds of gear. What gear will you need for your next...
Virtual Casino Games
Looking to find out what kind of games can be found at a virtual casino? Look no further because here we give you an overview of virtual casino games as most commonly played on the internet today.
There is an endless list of games available,...
What Can Be S.A.I.D. About The Golf Swing?
Probably the question that first comes to your mind when you read this title is: what is S.A.I.D. and how does it help my golf game? The reality is that S.A.I.D. is very connected to your golf swing and is a very important principle if you want to...
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Exercising In The Heat: 5 tips to help you keep your cool!
On a hot day we may feel like we're melting, but did you know that our internal temperature (or core temperature) only changes by a few degrees. Our normal body temperature at rest is maintained between 36 and 38 degrees Celsius. Our core temperature is extremely important as the processes that occur in our cells need it to be very constant in order to keep the body alive. In fact, you will require medical intervention if it drops below 34.4 degrees, or above 41 degrees.
Sources Of Heat
Apart from the obvious source of heat: the environment, the body also has another major contributor: metabolic processes. Anything that increases energy production, the release of hormones, or basal metabolic rate, also increases heat production.
Body Temperature Whilst Exercising
Body temperature reflects the balance between heat production and heat loss. As we exercise we increase our body temperature and for us to be able to continue we must be able to release the excess heat.
This is done using the circulatory system. The heat is carried by the blood, to the skin. It is then released into the external environment.
The release of heat is completed by any of 4 mechanisms:
* Conduction: the heat is transferred through contact with another object. This object must have a lower temperature. The body loses only small amounts of heat due to this process.
* Convection: the heat is transferred by the motion of a gas or liquid (eg, air across the skin when running, or water across the skin when swimming). As these air or water molecules come into contact with the body, heat is released to them, they move on, and are replaced by
cooler molecules.
* Radiation: the heat is transferred from one object to another without contact. This can result in heat loss or heat gain, depending on the environmental conditions
* Evaporation: heat is transferred through the evaporation of bodily fluids when brought into contact with the external environment (eg, sweat evaporating off the skin, and to a lesser extent our breathe as we exhale). This is usually the most important form of heat loss during exercise. In this process the heat is transferred from the body, to water on the surface of the skin (sweat). When the sweat reaches a certain temperature it is converted to a gas and the heat is released into the environment.
What does all this mean to the average exerciser?
The human body's automatic temperature controls work very well, but you'll perform much better if you follow these guidelines:
* Expose as much of the skin as possible to the open air. This will not only allow the sweat on your skin to evaporate, but it will also allow some heat loss via convection.
* If you are not able to expose much skin (eg, sports uniform), then take frequent water breaks.
* Wear cotton clothing whenever possible.
* In extremely hot weather, take frequent rest periods.
* If you do not regularly exercise in hot conditions, take time to acclimatize before participating in high intensity exercise.
About the Author
Ray Kelly has a degree in Exercise Science and 15 years experience as a Lecturer and Fitness Trainer. Sign up today for his free 7 Day Weight Loss Course at: Heart Disease, Diabetes, and Weight Loss
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