久久久无码人妻精品无码_6080YYY午夜理论片中无码_性无码专区_无码人妻品一区二区三区精99

  Chinadaily Homepage
  | Home | Destination Beijing | Sports | Olympics | Photo |  
  2008Olympics > In Depth

Pedal power

By Lei Lei and Matt Hodges (China Daily)
Updated: 2007-06-08 09:51


Sketch of the Laoshan BMX venue.

Imagine a pack of racers tearing down a BMX course with a UFO-shaped velodrome and Beijing in the background, as remote-control cameras catch all the action from wires overhead.

Crowds will gather at both ends of the snaking course, near the 8-m-high rolling start ramp and at the lower-elevation finish line, as helicopters capture aerial beauty shots.

"No one has ever seen a track like this before," said Mats Notlind, a technical director with the International Cycling Union (UCI), who was helping with the venue construction in Beijing last week.

"I would say it is the most perfect track ever built," said his colleague Johan Lindstrom, the UCI's BMX sports coordinator.

Forget Travis Pastrana. When BMX makes its Olympic debut in Beijing next year it will be in a space age setting that breaks the mould in terms of what the sport has seen before.

BMX Begins: How motocross 'evolved'

It started in the late 1960s in California, has since spawned a cult following at the Summer X Games and is now one of the most exciting sports at the 2008 Olympics.
Bicycle motocross - or BMX to its hordes of disciples - straddles the line between cycling and extreme sports, and has always had an edgy, subcultural feel.
It also generates captivating headlines and the allure of never-before-seen tricks.
Take Travis Pastrana, for instance. He won the Moto X Best Trick at the X Games last August with one of the scariest stunts ever pulled in professional sports: the first-ever double backflip on a BMX.
But the sport has always been about pushing the envelope.
Forty years ago in the US, it first appeared on the radar at a time when motocross (motorbike racing) was enjoying huge popularity stateside.
Children and teenagers with the desire but not the means to participate in motocross sated their appetite by racing bicycles on self-built tracks.
These young daredevils completed the imitation by dressing up in motocross gear. The sport was given the name BMX and the conception was complete.
BMX races are held on circuits of around 350m, featuring jumps, banked corners and other obstacles. Eight riders compete in each heat (qualifying rounds, quarter finals, semi-finals, finals) with the top four qualifying for the next round.
BMX racing was an instant hit, and nowhere more so than in California. During the early 1970s a sanctioning body was founded for the sport there. This is considered the official start of BMX racing, which was introduced in other continents later that decade, notably Europe in 1978.
The International BMX Federation was founded in April 1981, with the first world championships arriving in the following year. BMX rapidly developed as a unique sporting entity, and after several years clearly had more in common with cycling than motorcycling codes. As such, it was fully integrated into cycling's governing body, the Union Cycliste Internationale (UCI), in January 1993.
The US, Europe and Australia have dominated BMX in past years, but it is now growing in international appeal. Beach-loving South America has made rapid strides and the UCI now recognizes official BMX activities by 75 national federations.
Over 1,600 competitors from 32 countries participated in the 2003 World Championships in Perth, Australia.
On June 29, 2003, the International Olympic Committee decided to introduce BMX to the 2008 Beijing Games.
Source: Union Cycliste Internationale

Make no mistake, the Laoshan BMX course in western Beijing's Shijingshan District is going to be the most difficult the world's elite have ever faced.

"There are going to be some falls," said John Pauline of PTW, the Australian architects who are advising on the course. "There are going to be some spectacular falls."

Unlike other venues used for international events that have to cater to all levels of competition, this one has been tailor-made to test the limits of human endurance.

The initial start ramp will give the riders maximum acceleration, bigger air on jumps and a greater risk of personal injury. But for BMX fans, that is all part of the thrill.

"I think the designers are constantly frustrated that they're always building courses that need to be compromised, whereas at the Olympic Games for the first time they can create the most ridiculously hard BMX course to challenge the best riders in the world," said Pauline.

The course will be linked to the neighboring Olympic cycling track (Laoshan velodrome) by a vertical elevator to shrink logistical costs. Together with the nearby mountain biking course, the trio form one of several clusters of Olympic venues that organizers hope will spur development in one of Beijing's less prosperous districts.

In fact, the BMX track comprises two overlapping routes: one for the top 32 men in the world (370m) and another for the top 16 women (a slightly shorter 350m).

To make the men's competition more unpredictable, those who survive the initial rally out of the gates may have a choice of two routes. China's sports officials are mulling opening a junction one third of the way around that lets riders choose whether to stay on the outside or branch inside onto the women's track.

The downside? Those who veer onto the women's side would then have to reconnect with the men's track via an extremely gnarly jump.

Fortunately, the races are single-sex only.

"Some of the major banks that the women are turning around, the men are going to be jumping over, so they're going to have the biggest air, the biggest hang time, if you like, on these bikes, that the BMX world has ever seen," said Pauline.

Lindstrom said the 8m start ramp was a new innovation that was incorporated after it was used successfully in recent World Cups

"You don't really see it on normal BMX tracks, but we knew that we wanted a very exciting format in the Olympic Games," he said, adding that the riders will also have to take on gravity: the finish line is 4m lower than the start, creating a natural momentum for the riders that keeps on snowballing until they cross the finish line.

It took the UCI three years to design the track, a feat belied by its seemingly simple layout and lack of obstacles. Lindstrom said much thought went into taking the sport to the next level through a carefully engineered venue.

"While we were designing the track, we were also developing the sport," he said. "We don't want to just go into the Olympics with the traditional format. We want to create something spectacular."

The format of the course also developed through testing at recent World Cup series. The UCI sought feedback from riders and viewers alike to make 2008 a banner year for BMX.

"Now we finally got the right concept," said Lindstrom. "It's even more amazing in real life than in the 3D drawings we looked at."

As the biggest-ever BMX venue, the track has sucked up vast amounts of materials: 10,000 cubic meters, compared to 3,000-4,000 in regular tracks.

The rough layout of the track was finished earlier this month. It will be fully built before Beijing hosts the UCI BMX Supercross World Cup test event from August 20-21.

12  


久久久无码人妻精品无码_6080YYY午夜理论片中无码_性无码专区_无码人妻品一区二区三区精99

    欧美主播一区二区三区美女| 日韩精品专区在线影院观看| 亚洲高清视频在线| 欧美二区乱c少妇| 麻豆一区二区99久久久久| 久久精品在这里| 97久久人人超碰| 午夜欧美一区二区三区在线播放| 欧美一区二区三区免费在线看 | 欧美图区在线视频| 日本免费新一区视频| 久久亚洲综合色| 99精品1区2区| 日韩国产精品久久久| 久久精品一区二区三区四区| 91免费精品国自产拍在线不卡| 亚洲国产精品精华液网站| 日韩精品一区二区三区视频| 国产iv一区二区三区| 一区二区三区日韩| 26uuu国产日韩综合| 一本大道av伊人久久综合| 免费不卡在线观看| 国产精品乱人伦| 欧美精品日韩精品| 高潮精品一区videoshd| 午夜电影一区二区三区| 国产亚洲精品中文字幕| 在线观看91视频| 国产一区二区三区免费在线观看| 亚洲精品国产成人久久av盗摄| 91麻豆精品国产91久久久久久久久| 国产91丝袜在线观看| 手机精品视频在线观看| 国产精品人妖ts系列视频| 欧美日韩国产高清一区二区三区 | 国产精品视频一二三| 欧美日韩在线播放三区四区| 国产成人精品影视| 日韩国产欧美在线观看| 日韩理论片网站| 久久久噜噜噜久久中文字幕色伊伊| 91高清视频免费看| 国产成人在线电影| 欧美bbbbb| 洋洋av久久久久久久一区| 国产欧美在线观看一区| 欧美一区二区美女| 在线观看亚洲一区| 岛国精品在线播放| 精品一区二区三区香蕉蜜桃 | 成人av一区二区三区| 日本欧美肥老太交大片| 自拍偷自拍亚洲精品播放| 欧美mv和日韩mv的网站| 欧美日韩国产免费| 91在线视频在线| 国产成人av一区二区三区在线| 日本aⅴ精品一区二区三区 | 国产福利一区二区| 免费久久精品视频| 亚洲国产日韩a在线播放性色| 国产精品女主播av| 久久久精品一品道一区| 日韩欧美精品三级| 欧美日韩一区二区三区四区五区 | 日韩午夜在线观看视频| 欧美主播一区二区三区美女| av高清久久久| 懂色av中文字幕一区二区三区 | 日韩一区二区三区四区五区六区| 欧美影视一区在线| 91在线观看一区二区| 国产福利91精品| 国产在线精品免费| 久久精品国产久精国产| 水蜜桃久久夜色精品一区的特点 | 亚洲综合激情网| 国产精品成人一区二区三区夜夜夜| 久久综合色8888| 欧美变态口味重另类| 欧美一区二区私人影院日本| 欧美日韩成人综合天天影院 | 99精品偷自拍| 波多野洁衣一区| 成人黄页毛片网站| 福利一区福利二区| 国产aⅴ精品一区二区三区色成熟| 国产一区91精品张津瑜| 国产一区二区在线影院| 激情六月婷婷久久| 国产一区二区久久| 国产一区二区三区在线观看精品| 久久se精品一区精品二区| 另类成人小视频在线| 久久99精品久久久久久动态图 | 成人av资源在线观看| 成人黄色小视频| av中文字幕在线不卡| 成人av网在线| 一本色道久久综合亚洲aⅴ蜜桃| 91亚洲精品一区二区乱码| 99精品视频一区| 91女神在线视频| 91搞黄在线观看| 欧美日韩在线免费视频| 91精品在线麻豆| 欧美一级欧美一级在线播放| 日韩精品中文字幕一区| www久久久久| 国产欧美日韩另类一区| 国产精品每日更新在线播放网址 | 精品一区二区三区久久| 国产九色sp调教91| 国产成人激情av| 91在线porny国产在线看| 在线观看视频欧美| 4438x成人网最大色成网站| 日韩亚洲欧美成人一区| 久久久久国产精品麻豆ai换脸| 亚洲国产经典视频| 亚洲精选免费视频| 午夜精品福利一区二区蜜股av| 美女性感视频久久| 国产乱人伦精品一区二区在线观看| 大白屁股一区二区视频| 色妹子一区二区| 欧美精品一卡两卡| 久久人人爽爽爽人久久久| 中文一区二区完整视频在线观看 | 日韩和欧美一区二区三区| 美女视频一区二区三区| 国产精品88av| 色综合色狠狠综合色| 欧美疯狂做受xxxx富婆| 欧美精品一区二区三区在线| 国产精品国产精品国产专区不片| 亚洲午夜av在线| 精品一区二区三区视频 | 欧美一区二区精美| 国产亚洲精品精华液| 一区二区三区四区国产精品| 男女男精品视频| 成人手机电影网| 欧美亚洲动漫精品| 亚洲精品一区二区三区四区高清 | 国产在线不卡一卡二卡三卡四卡| 不卡的电视剧免费网站有什么| 欧美性视频一区二区三区| 精品蜜桃在线看| 亚洲日本免费电影| 麻豆精品精品国产自在97香蕉| 波多野结衣的一区二区三区| 69久久99精品久久久久婷婷| 国产欧美日韩在线观看| 午夜欧美在线一二页| 粉嫩aⅴ一区二区三区四区| 欧美精选午夜久久久乱码6080| 久久久久久久久久久黄色| 亚洲国产综合91精品麻豆| 国产高清成人在线| 欧美精品自拍偷拍| 国产精品理论在线观看| 美女诱惑一区二区| 一本久久综合亚洲鲁鲁五月天| 精品国产乱码久久久久久图片 | 亚洲免费观看高清完整版在线观看熊 | 国产精品萝li| 裸体歌舞表演一区二区| 日本精品一级二级| 久久网这里都是精品| 婷婷综合另类小说色区| 成人ar影院免费观看视频| 日韩一二三区视频| 一区二区三区精品在线| 国产精品亚洲专一区二区三区| 欧美精品在线观看一区二区| 亚洲欧洲无码一区二区三区| 韩国欧美国产一区| 欧美日韩国产在线观看| 国产精品家庭影院| 精品一区二区三区影院在线午夜| 欧美日韩视频在线第一区| 国产精品全国免费观看高清 | 视频一区中文字幕| 99久久久免费精品国产一区二区 | 国产精品第13页| 国内精品不卡在线| 欧美久久一区二区| 亚洲精选免费视频| 成人精品一区二区三区中文字幕| 欧美成人精品福利| 亚洲电影欧美电影有声小说| 91在线视频观看| 国产精品视频免费| 国精产品一区一区三区mba视频 | 亚洲日本在线天堂| 成人午夜伦理影院| 久久久www成人免费无遮挡大片| 蜜桃在线一区二区三区|