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Popular Science Knowledge —— The Origin and Development of Modern Biomechanics

Modern biomechanics originated in the late 1960s, and the development of biomechanics and sports biomechanics entered a period of formation and development. During this period, experts actively studied the biomechanical characteristics of human and animal movements. The scientific research of the following scholars is widely known: Alexander1970, author of biomechanics; 1974, Wu Ke Brodovich made a mathematical simulation of animal movement, which promoted the development of robot manufacturing technology. 1968, hillier Bohlander founded the theory that animals move with uniform gait. 1968 sukhonov established the general system of terrestrial vertebrate movement; Hatton's research on the regulation mechanism of human support exercise system: Miller's research on human exercise biomechanics. 1967 the first international symposium on biomechanics was held. 1973, the International Biomechanics Society (ISB) was formally established, marking the formal establishment of biomechanics. During this period, sports training was formed as an independent discipline in the Soviet Union, but before that, it only developed within the scope of sports. The following textbooks became the first works to elaborate the knowledge system of sports training: Modern Sports Training System by Ozolin of the Soviet Union (1970), Training Science edited by harriet of Germany (197 1) and Sports Training Theory and Method by Lidovski of Poland. This has promoted the development of sports biomechanics in the new scientific direction of sports training.

With the continuous expansion of the research scope of sports training, biomechanical research from different angles in athletes' technical analysis of competition has been actively developed. At present, the main institutions that study sports biomechanics are mostly in eastern European countries, such as Poland, Russia (mainly in Moscow, St. Petersburg, Volgograd, Krasnodar, Novosibirsk and other cities) and Ukraine (Kiev National Sports University and Kharkov National Academy of Sports Sciences). The practical significance of modern sports biomechanics research is determined by the following two reasons: on the one hand, the social significance of sports is constantly improving and the number of sports events is increasing, which determines the necessity and prospect of sports biomechanics research; On the other hand, with the rapid development of science and technology, many new scientific research methods are constantly emerging, which makes it possible to comprehensively study athletes' skills in completing competitions, thus improving athletes' training and competition results.

Popular science knowledge, we have:

1 During the day, birds are twittering in the branches and flying freely under the blue sky. At night, they should rest, sleep and recover their strength like us, but they sleep in different postures.

The reason why sorbet bubbles is because there is a lot of invisible water vapor in the outside air. When it meets a very cold sorbet, it will liquefy into droplets and surround it when it is cold. It seems that the sorbet is bubbling.

Sunflower stems contain a wonderful auxin. This auxin is very afraid of light. When receiving light, it will go to the backlight side, and at the same time, it will stimulate the cells on the wide side of the back to multiply rapidly. Therefore, the backlight surface will grow faster than the smooth surface, causing the sunflower to bend to the optical rotation.

Cicada's shell (exoskeleton) is hard and can't expand with the growth of cicada. When the cicada grows to a certain stage, the cicada's exoskeleton restricts its growth, and the cicada loses its original exoskeleton, which is cicada slough.

First, the bees spit the sweet juice of the flowers they picked into an empty hive. At night, they suck sweet juice into their honey stomachs to make it, and then spit it out and swallow it. It takes 100 ~ 240 times to make sweet honey.

Popular science riddle:

Get to the bottom of the casserole (tattoo) (name a popular science work in China)-100,000 Why?

Midnight (cite a modern literary work of China)

New Year's greetings (with a short story by Lu Xun as the title)

They are tall again in the weeds of the spring breeze (the name of Lu Xun's works).