How much does universe know in water

How much does universe know in water
How much does universe know in water
Staff reporter Tan Jia The Olympic match curtain is pulled open, the excellent tournament is being performed constantly. On the court, except that the trial of strength, competition of the speed, sports of skill of strength show enormous glamour, the scientific reason contained in athletics sports makes people fascinated too. Scientific combination such as movement, medical science, psychology, physics, chemistry are closer and closer, every gold medal, perhaps have a scientific reason behind every win and defeat. From today, this newspaper will choose some sports items, will ask the expert to lend a pair of insight to us, point out the right way for us, lead us to probe into the scientific way in the sports match. On August 10, in the national natatorium, the whole audience gave warmest applause and cheer to Zhang Lin. In the men's 400 meters freestyle final that are held on the same day, Chinese player Zhang Lin got the silver medal with the achievement of 3 minute and 43 seconds 32. This is the first Olympic medal that a Chinese man swims and gets too, have realized the historical break-through. When being interviewed by reporter after the match, Zhang Lin uses two pieces of " extraordinary " together Describe one's own satisfaction to the achievement. "Can make the Olympic Games achievement second, can defeat a lot of players, I think this is the best achievement. " Three major resistance are needed to overcome and " swim 100 meters in the swimming pool, run 400 meters on the land in other words. " The majestic teacher of form of experimental center of teaching of Beijing Inst. of Physical Education says, the swimmer seemingly as powerful as a flying dragon is actually not relaxed in the swimming pool, obstruction of this three major resistance that they must break through and press difference resistance, wave resistance, rub resistance, could swim to the victorious other shore. It is in the first pass that athletes face under water to press difference resistance. Density and getting viscid to well-above air, including 773 times and 55 times of air of water. So, work as athletes " crowd " water not compressible Pass through from the middle after opening, water flow into behind and the swirl emerges round the human body, pressure difference before and after forming. The longer axis of ordinates of the body is, close streamlinedly, meet the smaller water sectional area, it is the smaller to press difference resistance. That's why outstanding swimmer all have a slender size. Athletes swim in the wave, advance like water citing certain weight, this is ranking second of the wave resistance. Careful can see to look out, small runners separating the lane in the swimming pool are interfered with. It is that the third in the swimming is fettered to rub resistance. Because water is viscid, the moisture son adhering to the surface of body while swimming will drive the moisture son in the adjacent aspect to advance sequentially, this " border layer " Friction resistance that friction produces inside of the son of moisture in China. And rub the resistance, human surface area and roughness and become positive correlation, so prevail and " shave body mao " in the swimmer ,In order to reduce the coarse intensity of the body surface. " wasteful " It is cheap like Zhang Lin to gain all, American star Philps is very satisfied with one's own behavior on the same day too. In men's 400 meters mixing swimming final, he got the gold medal with the achievement of 4 minute and 03 seconds 84, and broken the world record of this event. The Bushes of the US President even come to personally to the court to cheer for American athletes. In 2004 Athens Olympics, Philps got 6 gold medals at one blow. On Beijing Olympic Games of this year, Philps' goal is to swear to take eight gold. Someone says, Philps is for swimming rawly. Born one pair wastefully, let Philps occupy the first chance in the swimming pool. Water is invisible, but strong. People have been influenced by propulsive force and double strength of the resistance at the same time while swimming in water. People produced reacting force to run while running on the land by the ground of pedal, people swim, have fixed support in water, can only by promote certain water of quality to act as the acceleration and take exercises behind, make oneself advance through reacting force. This whiff of strength is motive force of promoting people to advance in water. How to obtain greater propulsive force during swimming? Famous popular science writer Zhao Zhi really says, according to the third movement law of Newton, effort and reacting force are equal, in opposite direction. So, when people row the arm, kick one's legs in the rearward effort, need to try hard to strengthen the projection area of limb of the power thrusts, and accelerate the speed, in order to obtain great reacting force, namely forward propulsive force. So, the innately wasteful person occupies the congenital advantage in the swimming pool. Theirs is wasteful, like a pair of palms and foot webs to narrow edition, can gain all in rowing and moving cheap. Star Thorpe is born big hand and 47 yards of big feet like a pair of cattail leaf fans too to swim in five Australian carrying off the gold medals the second Olympic Games. Certainly, can break out in the swimming pool, except that the wasteful one is born the advantage, need athletes to use the correct and rational posture, hand shape, meet angle of water and strike the route even more, in order to raise using the efficiency of strength, reduce the waste of physical stamina. Displaying excellent Zhang Lin this time is at time when two degrees go to Australia to undergo training, get the concentrated guidance of famous coach Denis, has made very great progress on the ability of swimming. Recover field show body hand " most recovery of athletic injury train, be begun in swimming pool. " Beijing accumulate the intersection of puddle and hospital recover the intersection of head of the department and perilous peak Guo say, it swims to be an important weapon in the modern the intersection of dept. of orthopedics and the intersection of medical science of recovery therapy and field too. Swimming is the sports of a whole body, need overall coordination of nerve, skeleton, joint, muscle to cooperate. All general mobilization of each system of this kind of whole body are a great principle needing to adhere to while recovering to train too. "The joint pains, it is not merely own question of the joint definitely, with the muscle, tendon and skeleton attached to outside of joint too, and even the close relation that there are nervous systems. " Perilous peak Guo point out through swim the the intersection of whole body and sport of, can strengthen comprehensive harmony of human body, make every systematic function resumed comparatively fast. Perilous peak Guo say, the special buoyancy environment in water can lighten gravity load, let the articular cartilage damaged have a rest. 70% composition of human body is water, the average density is among between 0.96 kilograms and 1.05 kilograms / cubic meter. The adult of a standard stature is applied by the buoyancy, the weight when the head surfaces is probably 3 kilograms. With the help of buoyancy, bone arthritis patient can light and many while practising the walking in water. There is another magical effect in the swimming pool with rippling surface. Perilous peak Guo tell reporter whether each joint of human body have a extremely complicated biomethanics characteristic and coordinate each other, influence each other. So, while the joint which resumes the patient is moved degree and muscle strength, also need to help the patient to resume their sports to feel. For this reason, have designed a large number of movements to feel the technology of training in medical science of recovery therapy of modern dept. of orthopedics, among them including instructing the patient to be unstable and propping up Prop up and do exercises on the surface, reach it to the best kindling result feeling the sport organ. People, while swimming in water, because of the flowability of water, the human body is just on an unstable level. The flow of water causes the constant change of the base of support, the human nervous system needs to react to this change at once, thus make the movement mode damaged be strengthened or rebuilt.


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