• <abbr id="ck0wi"><source id="ck0wi"></source></abbr>
    <li id="ck0wi"></li>
  • <li id="ck0wi"><dl id="ck0wi"></dl></li><button id="ck0wi"><input id="ck0wi"></input></button>
  • <abbr id="ck0wi"></abbr>
  • <li id="ck0wi"><dl id="ck0wi"></dl></li>
  • Home >

    Secrets Of Technology Armed Sports Shoes

    2008/8/22 17:38:00 11

    Sneakers Technology Content Air Cushion

    Jordan's air cushion shoes, Lewis's ceramic spikes, Jones's "crystal shoes", Johnson's "golden shoes", Liu Xiang's "red magic shoes" and the history of sports shoes leave behind a footprints of the times.

    26 bones, 33 joints, 20 muscles, more than 100 ligaments, thousands of nerve endings and blood vessels.

    Human feet are the masterpieces of art and engineering.

    After walking upright from the human ancestors, we completely gave our weight to our feet, so that it could bear twice the load than the quadruped animals.

    Although sports shoes are full of beautiful things, the basic principles are basically the same.

    Its primary function is to absorb shock from the ground.

    When people run at speeds of 6 meters per second, the load on their feet is about 4 times that of their weight, and 7 times higher when they jump high. The strong oscillation will spread to the ankle, knee, hip, spine and brain.

    The human heel fat pad and the natural "spring system" arch are effective against this kind of injury.

    Modern sports shoes put a material with high "pressure and compliance" into the heel of the shoe, allowing it to absorb impact kinetic energy through its maximum deformation.

    In addition, some sports shoes have rubber columns and air cushions in the sole of shoes, playing the role of damping spring of automobile chassis.

    According to the test, when the weight of each running shoe is increased by 100 grams, the athletes' physical energy consumption will increase by 1%. When the US sprinter Lewis broke the world record of 100 meters, the running shoes were only 115 grams; the weight of "golden hamstring shoes" by Agam of the field "Michael Johnson" was only 116 grams, while Marian Joan's "crystal shoes" only had 99 grams; the Canadian "black leopard" Bailey's running shoes were described as "socks with nails".

    People are wondering why some athletes have a heavy gold necklace around their necks in the competition, but the weight of the shoes is so good.

    Looking at those fast flying feet on the 100 meter runway, it is found that each athlete's heels almost touch his hip. Folding the calf can shorten the radius of rotation of the hip joint, thus reducing the moment of inertia and increasing the angular speed of rotation.

    And the feet are at the far end of the knee around the knee and the rotation radius of the hip joint, so a slight reduction in the weight of the shoes will bring a significant reduction in leg inertia.

    This is undoubtedly a great "burden reduction" for the two feet alternately marking the arc at the speed of 20 meters per second.



    • Related reading

    Haibo Laser: The Fastest Way For Mid Sized Shoe Manufacturers To Collapse

    News and information
    |
    2008/8/22 17:33:00
    17

    Shoes Trademark Is Like ADI, Wumi Shoes For Sale Infringement.

    News and information
    |
    2008/8/22 17:30:00
    9

    Fujian Quanzhou Industry Leveraging Hongkong TDC To International

    News and information
    |
    2008/8/22 17:29:00
    15

    "Cottage Shoes" Trampling On Genuine Shoes Dealers Genuine Imitation Products Mixed Sale

    News and information
    |
    2008/8/22 10:04:00
    7

    Minnan Private Shoe And Clothing Enterprises "Win" In Olympic Games

    News and information
    |
    2008/8/22 9:52:00
    10
    Read the next article

    Custom Shoes Become Fashion Liu Xiangxie Hot Sale

    To say the most fashionable thing in Beijing is to customize the shoes. Many big brand sports brands have launched the "double foot DIY" service in the Olympic Games. Customers can design their own styles and choose colors.

    主站蜘蛛池模板: 美女脱了内裤打开腿让人桶网站o| 亚欧洲精品在线视频免费观看| 一个人hd高清在线观看| 美国bbbbbbbbb免费毛片| 操美女视频免费网站| 国产91精品一区二区麻豆亚洲| 久久91综合国产91久久精品| 色综合久久精品中文字幕首页| 日本一区二区三区在线看| 国产亚洲欧美日韩精品一区二区| 久久亚洲AV成人无码国产| 色婷婷精品大在线视频| 打开腿我想亲亲你下面视频| 含羞草影院视频播放| 一区二区三区欧美视频| 狠狠精品久久久无码中文字幕| 在线小视频国产| 亚洲国产综合人成综合网站00| poren日本| 日韩一区二区三区精品| 国产一区视频在线免费观看| 东北少妇不戴套对白第一次| 男男全肉高h视频在线观看| 天堂俺去俺来也WWW色官网| 亚洲精品无码av人在线观看| 18成人片黄网站www| 最近中文字幕最新在线视频| 国产制服丝袜在线观看| 中文字幕久久久久| 男人边吃奶边做视频免费网站| 国模一区二区三区| 亚洲一区二区三区欧美| 连开二个同学嫩苞视频| 年轻帅主玩奴30min视频| 亚洲精品偷拍无码不卡av| 69式互添免费视频| 日日躁夜夜躁狠狠躁| 六月丁香婷婷天天在线| 91华人在线视频| 日韩国产中文字幕| 北条麻妃在线视频观看|