The elastic efficiency he shows should mainly be the conversion efficiency of the ball's rebound force, not the efficiency of the batting force being converted into the ball's flying speed or rotation speed through the sole plate. The base of the loop ball needs to hold the ball for a longer time at the moment of hitting the ball - a deeper impact deformation, and a faster deformation recovery speed - at least greater than the rebound speed of the incoming ball, in order to be able to integrate the moment The resultant force of friction and impact, so a thinner and softer ball plate with reasonable design is more suitable for looping the ball. Furthermore, the loop ball is basically a completely independent hitting method. When hitting the ball, you need to try to overcome the problems of too short ball control time or insufficient friction caused by the rebound force of the incoming ball. Therefore, the rebound efficiency of the loop ball is too high. A taller blade will not be as easy to hit as a blade with more power efficiency. There is no doubt that a thinner and softer bat may not bounce a few times when used to weigh the ball in a static state, but it has better power conversion efficiency under dynamic swing forces, allowing you to feel the force of your pull and the ball. It's a direct ratio, but a strong bat will feel inefficient when hitting the ball hard. In the early 1990s, most athletes were still playing with harder and thicker traditional blades. In a match between China and North Korea, Chen Zhibin could not beat North Korean player Kim Sung-hee's backhand half-lobs from far away. Chen Zhibin was a member of the national team at that time. One of the best athletes with explosive power. Watching this game was chilling. Xu Yinsheng, chairman of the Table Tennis Association at the time, asked: Why do many of our players tilt their rackets too forward when hitting the loop? However, foreign players only tilt the board slightly forward when hitting the ball, and can easily pull and buckle it together. We also tried to improve in training, but it was okay to pull one or two boards with the upper hand. When we continued to pull, we felt the ball falling downwards. In order to ensure the arc, we had to increase the upward force and sacrifice the flying speed; in order to pursue speed, we had to tilt the racket forward. Increase the depth of the sponge rubber holding the ball when the ball comes. Both cannot be achieved at the same time, not to mention that simply relying on the elasticity of sponge rubber on the CORS is far from being able to generate the energy required for greater speed. Later, after using softer and thinner ball boards, the above problems were solved. Due to the force characteristic of the arc loop and the large running range, there are more batting periods to choose from, and the range of action is obviously larger than that of the fast break near the table. In fast confrontation, If you use big movements and strong force to hit the ball, you will naturally choose a lightweight bat, which not only saves effort, but also increases the swing speed. Therefore, since the 1990s, no one in Europe likes cricket boards above 90g. Now the younger generation of Chinese fans are also beginning to like lightweight cricket boards.

In contrast, with the development of the times, the configuration of sponges has not changed as much as the bottom plate. In the past, players who played fast breaks close to the table preferred soft sponges. Double Happiness No. 12 sponge is most suitable for use on rubber rackets that play fast breaks close to the table. Japan TSP's raw rubber sponge is world-famous. Their hardness is below H40, and the index indicated by the Shaw hardness system used by Double Happiness will be even lower. Fast attackers near the table like soft sponges because of the way they choose to hit the ball - mainly impact. They need to give full play to the hard impact and precise effect of the blade at the moment of hitting the ball, so as to quickly apply the batting force to the ball through the bat and control the speed, arc and landing point of the ball. However, a sponge that is too thick and too hard will directly affect their feeling of ball control, making them feel that they have no control over their hands. This is the reason why Zhuang Zedong, who was known as the cutting-edge force-generating mechanism at that time, could not switch to hard sponges no matter what, and why Deng Yaping, who later became famous for her rapid-fire smashes, only used 1.5mm thick sponges. We also have experience in this regard. Once, a middle-aged golfer drove from Zhuozhou to our store to buy a racket. He chose a lighter weight (85g) three-layer carbon Super Speed-B pen-hold racket. Because he introduced himself It is a combination of fast break and loop ball play, and we chose a lighter blade, so we equipped him with a sponge with a hardness of 46 degrees and a thickness of 2.1mm, and attached anti-adhesive glue. But two days later, he came back and said that he couldn't hear the "pop, pop" sound when hitting the ball, so he couldn't find the feeling of hitting the ball.

At first, everyone thought that the blade was too soft, so they replaced him with a harder blade, but it still didn't work. When he tried playing, I found that his attack action was a traditional pen-hold fast-break impact attack. He still had something to do urgently and had no time to continue trying, so I suggested that he only replace a sponge with a 40-degree, 2.1mm sponge. After changing it, he left in doubt, and our staff was not sure either. It wasn't until the evening that we received a call from him. He happily told us: Now he has found the feeling. At this time, everyone's hearts dropped.

The sponge used to pull the loop ball has always been relatively hard and thick. The thicker sponge deforms deeply when pulling the ball, making it easier to control the ball. In addition, the harder and thicker sponge deforms and stores more energy. It is bound to have higher resilience and can meet the simultaneous requirements of rotation and speed when hitting the ball. Just since switching to 40mm balls, in order to adapt to the slower speed and softer ball caused by the increase of the ball, the athletes have adjusted their sponges to appropriately increase the thickness of the sponge (above 2.2mm) and reduce the thickness of the sponge. Hardness (below 46 degrees) is currently the only choice for many people. Of course, when thickening the sponge, the thickness of the reverse glue must also be considered. According to the ITTF rules, the total thickness of the sponge rubber cannot exceed 4mm.

In short, the racket is material, and material is the basis. A properly configured racket can certainly allow people to play golf with ease and express their style to the fullest. But people also need to be spiritual, learn advanced techniques, study and master various skills, techniques and tactical changes in hitting the ball, so that the racket in your hand can become your real "sharp weapon". This is also the reaction of spirit on matter in dialectics.