Olympic Games behind the protagonists

In this time of the Beijing Olympic Games, it is not difficult to find, national scientific and technological breakthroughs also helps national athletes compete in the arena gold wins silver. 　 United States, popular mechanics "magazine, published in August, this time in the Olympics made of new technology. Wonderful bathing costumes can help Phelps? United States player Phelps body born is a swim in the machine, two arms expand up to two metres, height also long 7.6 cm; torso than 0.8 m legs long out of many, the test results show that his muscle movement produced by lactic acid than most athletes much less, which makes him more stamina, his elbow, knee and ankle joints are also very flexible. Every day he insisted in the Shui 4 hours or more in the training. Such talent and hard work, makes Phelps at the 2004 Athens Olympic games only have 6 medals. 　　But to break the compatriots Spitz 1972 Munich Olympic Games, winning a record of 7 gold medals, probably also need the help of new technology. A 200-metre freestyle, athlete's speed can reach 6.1 km/hour, in order to fight the resistance itself, you need to consume 290 thousand joules of energy (about 72 kcal of calories). In order to reduce the human resistance, many swimmer or even full-body body hair shaved off. But the study found that even skinny-dipping, resistance to wear swimwear greater than 9 per cent. In 1950 the nylon swimsuit, 1976 appearing polyurethane fiber swimwear, contribute to our body tensed into streamlined to reduce the water resistance. But the real breakthrough is a 1998 United Kingdom at the Commonwealth Games on first use "sharkskin" swimsuit. With Teflon fabric made from this kind of swimsuit mimics shark on the surface of the epidermis into the spinal column-shaped small Protuberance, be more effective in the body of the surrounding water, reduce resistance. 　　In October 1999, "shark skin" swimsuit approved officially Fina, 2000 was Australia swimming star Ian Thorpe to the Sydney Olympic Games, he won the gold medal in the 400 m freestyle, 200 m free style silver medal, 4 × 100 meter, 4 × 200 m freestyle relay gold medal, "shark skin" has helped. Phelps for the Beijing Olympic Games will bring new swimwear is the United Kingdom "ratio of Tao" (Speedo) companies selling LZR Racer, 290-550 USD. 　　Since February this year has been wearing a LZR Racer player has broken the world record of 37 items, this wonderful "shark skin". These latest "sharkskin" bathing costumes from the shoulder to the heel close to the skin that looks like a cloak of Superman is not covered. Its primary function is to package up the breasts and buttocks are swaying in the water increases the resistance of the parts, the people to put their own packed into this swimwear is takes time. 　　In addition to reduce resistance, they also enable the swimmer on the lower level of living in more locations. Of course, in the United States Space Agency (NASA) of wind tunnel in measuring the coefficient of friction, swimwear fabric established physical fibrillation hydrodynamic model is one thing, in the swimming pool was chopping waves to gold is another matter. Improving zero seconds to decide whether Phelps picked a few pieces of gold, but it's the number attributed to the "shark skin" swimsuit, it is difficult to accurately measure, because sport is always a degree of personal talent, training and new equipment integration. 　　Large loop action mechanical mystery gymnastics is beautiful and mechanical binding paradigm, even just a simple uneven bars big loop (gymnastics high difficulty air swivel action), players and hands flexible staves, lies between the complex power and energy conversion. Large loop, competitors from bars on inverted position. Due to the hand and the friction between the staves will enable loopback speed slightly reduced, the first half of the circle of angular velocity close to 275 degrees/second. But in the first half of the circle, players must go up half a circle accumulates enough kinetic energy, especially in the next ring will need to complete the flight or to enter a series of flip down bars. 　　Thus they must be in the down half circles, the energy transfer to the tough carbon fiber bars, up half rings and absorb energy, increase loop speed. Whereabouts for compensation of loss when loopback speed, uneven bars women athletes will use a "swing" action. In a slightly warped hip your legs to avoid low bars, but also shortens the rotation of the arm, so that their focus as close as possible to the center of rotation, increase the rotational energy. In a loop at the bottom, players body downward acceleration can reach 4 ~ 7 times that of gravity, hands up high staves can be pulled out of the centre line 27 cm. Then, they relax the hips and pelvis and abdomen, legs forward, left in the half circle loop up. Such use of Horn power, they can make their own rotation rate increases to approximately 304 degrees/second. This is why uneven bars big loop action is available only from the first half of the circle through the direction of the lower bumper, not the opposite of the truth.