| In December 1926, the ITTF was established, and table tennis became an independent sport. Nearly a hundred years, the International Table Tennis Federation through continuously to changes in regulations and timely modify to promote and popularize the sport, to allow more people to participate. The revision of the rules and regulations, promote the technical innovation, increasing the game to watch and help in the movement to scientific, professional and commercial trend, make the development of table tennis this project showing the balance, break the balance, rebalancing "of the harmonious situation.In May 2013. During the world championships in Paris, the International Table Tennis Federation decided since beginning July 1,2014 and put into use by a mixture of polyvinyl chloride (PVC) as the main material of the new table tennis. This also indicates that had been used for nearly one hundred years celluloid ball will become the past. This reform, in addition to material changes, the other change is the adjustment of the size of the ball. The International Table Tennis Federation of plastic ball size to make the new provisions:before 39.50-40.5 mm adjustment for 40.00-40.60 mm by the diameter of the plastic ball. Although it is only a slight increase in diameter, but it will also make the game table tennis rotation, flexibility and speed of revolutionary changes.So far, although many scholars have been exploring a variety of plastic ball impact on the game, but are mostly based on celluloid ball and new plastic ball physical differences brought about the theoretical changes or player for the subjective feelings of the new plastic ball, and coaches and experts according to experience, the influence of the new plastic ball judgment, quantitative research is still very limited. These studies are limited to the use of a new type of plastic table tennis speed slow, the volume increases, the rotation weakened and so on. New ball use caused by hitting round of changes and differences in quality and technical attack, game time variation, is locked in a stalemate segment ratio is increased, for these changes is still a lack of quantitative studies.In view of this, the of 80 games video to watch, including celluloid ball 48 games, containing man 34 games, woman,14 field; new plastic ball 32 games, man 21 games, women 11 games. Using mathematical statistics, video observation, literature and other research methods, the use of new plastic ball before and after the game data statistics, comparison, analysis. In order to ensure the accuracy of the data, all statistics are completed by myself, in order to minimize the error of judgment, to ensure the consistency of statistical results. Through the statistical analysis, explore the new plastic table tennis elite male and female athletes in game time, rally plate number, technical and tactical changes, and draws the following conclusions:(1) increased due to the change of new plastic ball material, diameter of the ball, the ball speed reduced to hit the ball strength and other physical qualities is proposed to improve the further requirements. Suggest an appropriate increase in special physical fitness training.(2) no matter male or female athletes in the new plastic ball game, the average time per plate game increased. Players need more energy reserves to cope with the game's increase in the current situation of the new ball, to enhance the ability of the development of oxygen supply, the development of endurance quality, as soon as possible to adapt to the time structure of competition growth.(3) the distribution of the number of the game board is four, three, five or six, both male and female athletes and the use of the ball in the match. The highest proportion of the number of plates are four. Serve attack, receiving, Fourth Board is a key game for the players of both sides.(4) the new plastic ball hitting time were greater than the celluloid ball. The longest period of time at start, local time becomes shorter and the tail board; the non hitting time as the game progresses gradually increased. Therefore, attention to the start of the game, the characteristics of the short game time, active, the first to get started. To enhance aerobic training in training, to provide a good physical support for the end of the game play technical warfare.(5) to deal with the new plastic ball, in the form of physical fitness training to strengthen at the same time, in the technical aspects should be before the awareness.(6) the new plastic ball game in sweat, average number of suspended above the celluloid ball. Players can make full use of the wipe, suspended on their own game adjustment and interference opponent.(7) athletes on the adaptation of the new ball in addition to strengthen their physical fitness training should also strengthen the comprehensive study on the rubber bushing, a bottom plate and other equipment to find has to deal with the new ball race training means and methods. |
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