16 nov. 2007

What`s your favorite sport and why?




I am a passioned mtber.I like that filing of success and satisfaction when on the top of a peak climbed at great pains.
What`s your hobby?Tell me a bit about you.

15 nov. 2007

BMX



BMX (an acronym for Bicycle Motocross) is a form of cycling on specially designed bicycles which usually have 18 to 24-inch wheels (the norm being the 20-inch wheel). The sport includes racing on earthen tracks, known as BMX racing, as well as the performance of tricks on the bikes, called BMX freestyle.

Freestyle BMX has grown to include five distinct disciplines. These are Street, Park, Vert, Dirt, and Flatland. These usually involve technical movements of the bike in different ways over varied terrain. There are also three disciplines which are participated in mainly by riders who are not affiliated with the major BMX organizations or sponsored events. These are High Jump, Leap Of Faith and Drag.
Recently, BMX racing's international governing body, Union Cycliste Internationale (UCI), began sponsoring the UCI BMX World Championships. In 2008, BMX racing will enter the Olympics for the first time in Beijing, China.

As BMX matured from its early roots in the 1970s and 80s, it has become increasingly part of modern popular culture. In the same way that skateboarding entered the mainstream with Tony Hawk lending his name to the immensely popular video game franchise, BMX has produced its own household name – Mat Hoffman.

Australian band Revolver have a song titled "Dippers" on their 2006 album "In Absinthia". The song is about BMX riding.

Over the last decade, the popularity of BMX has grown immensely. It is now one of the staple events at the annual X Games competition held largely on the Western seaboard of the United States.


14 nov. 2007

Motocross



Motocross (often shortened to MX or MotoX) is a form of motorcycle sport or all-terrain vehicle, and traces its origins to British Scrambling competitions. The name "motocross" is a contraction derived from the words "Motorcycle" and "Cross Country". racing held on enclosed off-road circuits.

Freestyle motocross

Is a relatively new sport, is not racing and instead concentrates on performing acrobatic stunts while jumping motocross bikes. The winner is chosen by a group of judges. The riders are scored on style, level of trick difficulty, best use of the course, and frequently crowd reactions as well.
One stunt performed is the backflip, which was disputedly completed on a 250cc motorcycle by Carey Hart using a specially designed dirt ramp. Soon after this, Mike Metzger completed this stunt using a standard freestyle ramp and dirt landing . More recently Mike Metzger actually did a Backflip over the Caesar's Palace Fountains . Some consider the body varial 360 as the most difficult stunt being performed at this time. This stunt, also called the Carolla, was first performed by Chuck Carothers at the 2004 X Games. Prior to this, the backflip 360, or off-axis backflip, was widely considered the most challenging stunt. Another rider taking freestyle to a new level is Travis Pastrana. In 2006 he did the world's first double backflip, at the 2006 X Games Travis performed the world's first double backflip (in competition) . It earned him the gold for best trick, that is now considered the most difficult trick.

Base jumping



BASE jumping grew out of skydiving. BASE jumps are generally made from much lower altitudes than skydives, and a BASE jump takes place in close proximity to the object serving as the jump platform. Because BASE jumps generally entail slower airspeeds than typical skydives, because of the limited altitude, a BASE jumper rarely achieves terminal velocity (that speed achieved after twelve seconds of acceleration). Because higher airspeeds enable jumpers more aerodynamic control of their bodies, as well as more positive and quick parachute openings, the longer the delay, the better.
Skydivers use the air flow to stabilize their position, allowing the parachute to deploy cleanly. BASE jumpers, falling at lower speeds, have less aerodynamic control, and may tumble. The attitude of the body at the moment of jumping determines the stability of flight in the first few seconds, before sufficient airspeed has built up to enable aerodynamic stability. On low BASE jumps, parachute deployment takes place during this early phase of flight, so if a poor "exit" leads into a tumble, the jumper may not be able to correct this before the opening. If the parachute is deployed while the jumper is tumbling, there is a high risk of entanglement or malfunction. The jumper may also not be facing the right direction. Such an off-heading opening is not a problem in skydiving, but off-heading opening that results in object strike has caused serious injuries and deaths in BASE jumping.

13 nov. 2007

The famous RED BULL



Red Bull is the brand name of an energy drink that originated in Thailand and, in a version adapted to Austrian tastes, is now popular throughout the world. Sold by Red Bull GmbH as an energy drink to combat mental and physical fatigue, it contains, per 250 ml (8.3 U.S. fl. oz.) serving, about 21.5 g sucrose, 5.25g of glucose, 50g of inositol, 1000 mg of taurine, 600 mg of glucuronolactone, vitamin--20 mg of Niacin, 5 mg of Vitamin B6, 5 mg of Pantothenic Acid and .005 mg of Vitamin B12 and 80 mg of caffeine. The caffeine in one serving is less than that found in an average cup of coffee (typically 100 mg/250 ml cup) or twice as much as found in a can of Coke (40 mg/330 ml can.) A sugar-free version has been available since the beginning of 2003 . Sugar-free Red Bull is sweetened with aspartame, as opposed to sucrose and glucose.
The drink is intended to taste like mixed berries, and is commonly used as mixer in alcoholic drinks such as vodka and is the base ingredient in the now famous Jägerbomb and Remytini.This sort of mixt is causing hallucinogenic effects like cocaine and heroin(my advice is not to drink that cocktail).Almost 1 billion of the slim 250 ml cans were sold in 2000 in over 100 countries, 260 million of them in the UK. In 2006, more than 3 billion cans were sold in over 130 countries. 3,903 employees generated 2.6 billion euros in turnover.
Health concerns
The sale of Red Bull is prohibited in some countries, usually due to its taurine content or its high level of caffeine. However, many countries which formerly banned Red Bull (and similar energy drinks) have revised their legislation to allow drinks containing taurine or higher amounts of caffeine, including Switzerland (1994), Finland(2005). As of 2007, Red Bull remains prohibited in Denmark, Norway, France, Uruguay and Iceland.

About Extreme Sports


Extreme sport (also called action sport and adventure sport) is a media term for certain activities perceived as having a high level of inherent danger or difficulty and often involving speed, height, a high level of physical exertion, and highly specialized gear or spectacular stunts.
Extreme sports are often associated with various youth subcultures. Extreme sports are no more "extreme" than traditional activities played at a high level. The few generalizations that can be made about extreme sports is that they are almost always individual instead of team activities and that they often focus on performing tricks or stunts.

THE ADRENALINE RUSH
A feature of such activities in the view of some is their alleged capacity to induce an adrenaline rush in participants. However, the medical view is that the rush or high associated with the activity is not due to adrenaline being released as a response to fear, but due to increased levels of dopamine, endorphins and serotonin because of the high level of physical exertion.Furthermore, a recent study suggests that the link to adrenaline and 'true' extreme sports is tentative.The study defined 'true' extreme sports as a leisure or recreation activity where the most likely outcome of a mismanaged accident or mistake was death. This definition was designed to separate the marketing hype from the activity. Another characteristic of activities so labeled is they tend to be individual rather than team sports. Extreme sports can include both competitive and non-competitive activities.

REASONS
Some who enjoy extreme sports repudiate the stereotypical "adrenaline junkie" tag. The practitioners would claim they enjoy developing their physical and/or mental skills, seek mastery of inhospitable environments, look to escape from the mundane rigors of day-to-day existence, or simply love the wilderness environment in which many of these sports take place. Bob Drury, a paraglider pilot says, "We do these things not to escape life, but to prevent life escaping us"—even though accidents in these sports could be fatal. Many participants also don't think of their activities as either extreme or sports at all. To the most passionate purists, the sport label doesn't fit because they aren't competing to win anything. Worse, the extreme label has frequently been blamed for stereotyping participants in these activities as stupid, reckless, and even suicidal. Eric Brymer PhD (2005) also found that the potential of various extraordinary human experiences, many of which parallel those found in activities such as meditation, was an important part of the extreme sport experience.

Some of the sports have existed for decades and their proponents span generations, some going on to become well known personalities. Rock climbing and ice climbing have spawned publicly recognizable names such as Edmund Hillary, Chris Bonington, Wolfgang Gullich and more recently Joe Simpson. Another example is surfing, which was originally invented centuries ago by the native inhabitants of Hawaii.

A great extreme sport:MOUNTAINBIKING


Mountain bikers are a different breed. Not only are they going to school but they are doing it without the support of their professors unlike the varsity sports. In between midterms and papers they find time to train like professional athletes and each year the level of competition increases.
For example this year Banner Elk, North Carolina played host to the collegiate mountain bike invasion and let's just say the event was better than ever.

Discipline oriented designs

There are several different styles of mountain biking, usually defined by the terrain, and therefore bikes employed. All of the bikes in this category fall into one of the above four categories and bikes of each of the above style can be found almost any of the following categories.

  • Cross Country (XC) mountain bikes typically have only a small amount of front and/or rear suspension (usually 65-110 mm) and are relatively light, which is achieved via the use of lightweight materials and construction in both frame and components. As a consequence, XC bikes are often less durable than other types of mountain bikes when used outside of their intended purpose.Suspension, both front and rear, is typically provided by pneumatic (air) shocks and forks, which saves weight. Some XC bike models have no suspension and use a rigid front fork, saving weight but relying more on rider skill to negotiate rough terrain. XC riding is the most popular form of mountain biking, focused on efficient climbing rather than aggressive descending. XC bikes reflect this in their lighter weights and steeper geometries than downhill bikes. However, most XC bikes are poor choices for stunts like jumps.
  • Enduro/All-Mountain (AM) bikes are generally heavier than XC bikes, typically weighing between 30 and 35 pounds (14 to 16 kg). These bikes tend to feature greater suspension travel, frequently as much as 150 mm of front and rear travel, often adjustable on newer mid and high end bikes. They are designed to be able to ascend and descend mountains, integrating the climbing abilities of XC bikes with the suspension technology of freeride bikes.
Freeriding on a hardtail freeride bike

Freeriding on a hardtail freeride bike
  • Freeride (FR) mountain bikes are similar to All-Mountain bikes, but with less emphasis on weight and more on suspension. Freeride bikes tend to have up ample suspension, with 7 (178 mm) or more inches of travel fairly commonplace. The components are built from stronger, consequently heavier, materials. They can be ridden uphill, but are inefficient and their moderately slack head tube angles make them difficult to maneuver while angled up a hill or traveling at a low speed. They are effective on technical downhill trails. Frame angles are typically steeper than those found in downhill bikes. This enhances maneuverability over and around small objects. Freeride bikes typically range in weight from 30 to 45 pounds. Freeride trails usually use the natural terrain to create stunts such as dropoffs, narrow ladder bridges called "skinnies", as well as large ramps built to launch the rider into the air. The most durable freeride bikes are often too heavy and have too much suspension to be ridden uphill as comfortably as other less-sturdy models, although newer, more expensive bikes come with suspension specifically designed to make them easier to ride uphill. It is, however, quite common for freeriders to frequent lift accessed riding terrain, offered at ski resorts during the off season, or simply walk their bikes uphill, rather than riding them.
  • Downhill (DH) mountain bikes typically have 7 or more inches (178 mm) of suspension travel. They are built as strong as possible for reliability during racing and weigh around 40-45 lbs (21 kg). Due to their typically large or high gears and long, soft travel, Downhill bikes are suitable only for riding down dedicated downhill trails and race courses. The suspension is set to sag around 30% front and 50% rear of full travel, creating ample traction around bumpy corners. The head angle is often as slack as 64 degrees. Most riders who ride exclusively downhill do so in competitions or ride almost exclusively on lift accessed terrain, but tramming up to the top of runs is still by far the most popular as most trails do not have lift access. Pushing the bike to the top is also a commonly used method. Due to the high speed nature of downhill riding most bikes only have one chain ring in the front, a large bash guard and a chain guide.
  • Trials mountain bikes are set up very specifically for the purpose of bicycle trials. Two varieties of trials bike exist, those with 26" wheels (referred to as 'stock') and those with 20" wheels (referred to as 'mod' - because historically they were modified BMX bikes). They typically have no suspension at all, though some still make use of some form of it. Competition rules require stock bikes to have multiple gears for competition, but most riders never use their shifters. Competition rules do not require mod bikes to have any gears. Many non-competitive riders run single-speed, choosing a fairly low-speed, high-torque gear. Most modern trials bikes have no seat at all, as the rider spends all of his time out of the saddle. These bikes are significantly lighter than almost all other mountain bikes, ranging from 15 to 25 pounds. This makes manoeuvring the bike much easier.
  • Dirt Jumping, Urban and Street mountain bikes lie somewhere in between a trials bike, a BMX bike and a freeride bike. They are typically very strong bikes, with 0 to 4 inches of front suspension, and rarely any rear suspension (3 to 4 inches if any), with as many as nine gears or as few as one. Tires on these bikes are usually fast-rolling, slick or semi-slicks. Dirt Jumpers usually sport a geometry of 24-26" tires, as well as a "bash ring" replacing the largest ring on the crankset.
  • Single-speed mountain bikes have one set gear ratio. The gear ratio chosen depends on the terrain being ridden, the strength and skill of the rider, and the size of the bike (a bike with 29" wheels often requires a different gearing than a bike with standard 26" wheels). Often single-speeds are fully rigid, steel-framed bikes. These are typically ridden by very fit individuals on mild to moderate cross country terrain.
  • Mountain Cross or "4-cross racing" (4X) is a relatively new style of riding where four bikers race downhill on a prepared, BMX like, track, simply trying to get down first. These bikes are generally either full suspension with 3 to 4 inches of travel, or hardtails, and have, typically, quite strong frames. They run a chainguide on front and gears on the back. They have slack head angles, short chainstays and low bottom brackets for good cornering and acceleration.
  • North Shore mountain biking originated in the steep, wet, rocky, rooty terrain of Vancouver, Canada's north shore, thus it was coined "north shore" riding. Because of the almost, if not completely impassable terrain, riders began building bridges over muddy areas, rocks, stumps and deadfall. These bridges evolved into complex, often extremely challenging, man-made stunts. Because stunts are often narrow and may require the rider to move very slowly regardless of width, north shore riding requires immense balance and bike handling skills. North shore bikes are much like freeride bikes in their geometry and downhill bikes in their component makeup. Because north shore stunts have evolved to not only include simple and complex bridges but also large drops and high speed descents through a series of stunts north shore bikes commonly have as much travel as downhill and freeride bikes, however with much more nimble and maneuverable frame designs, and often lighter-weight.