This is indeed feasible in theory. If you have experienced a pot of downspin practice, you should have this experience. We often have the following stages for the level of backspin. The goal at the beginning is to turn the ball. The evaluation index can be that the opposite person uses the ball to receive the serve, and then examine the frequency of the ball to the net. Later, the goal will be higher, that is, the ball cannot be released, and the evaluation index, that is, the second jump is still in the table. Then, you will require the ball to be served very low, at least not to allow the opponent to be able to twist and pull on the first board. The above are all servings that are practiced for actual skills and tactics. When these are played proficiently, you will want to show off your skills a little more. For example, if the pursuit of more extreme is not released, the indicator is that you practice a bowl of serve, and finally the net on the opposite side of the table is full of ping-pong balls. To be more extreme, you can control that during the training process, each serve will bounce back to your own table quickly after the first jump on the opposite table. I have also heard of the more amazing thing, which is that every serve is flared…Ok, then why no one does this in the actual game. I have seen that the main answer has already said that, in fact, it is difficult to control the height of the arc with such a serve. At a certain level, such a serve is a death-hunting. Of course, if the opponent’s level is far from yours, you can indeed serve this way during the game, but such serve is not the reason you won. Then let’s talk about a practical problem. When it comes to the game, it is very good to be able to achieve half the stability of the training level on the service level. For example, as Ma Lin, as the best pen-hold shot player who can serve the backspin in the ball without forwarding (there are a lot of video materials of Ma Lin’s serve on the Internet), when it comes to the real key game, his hands are also trembling. If you are interested, you can take a look at the second half of the final round of the 1999 World Table Tennis Championships men’s singles final. Ma Lin made almost every serve… Then Liu Guoliang played and passively defended herself. Although this may also be a tactic, the defense was broken in the end, and the last ball is typical.

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By stockin

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helpmekim
5 months ago

Don’t tell me, I have really practiced this kind of serve. It is easier for him to bounce back to the net. I estimate that professional athletes can do it 100%. Why not use it? Because this kind of ball needs a high parabola, it can change the direction of the ball by rotating and rubbing against the table, so that the ball bounces back. A low parabola is not good, because the forward momentum is too large, and the friction caused by the rotation is not enough to change the direction of the ball. The parabola height must be accompanied by a slow speed. In a game of this kind of ball, the opponent has enough time to come up from the side, pat to death, and then there is no more. As for the kind of whirling hitting the net you mentioned, it is not impossible, as long as the parabola is high enough and the landing point is close enough to the net. I have typed it out once, and the probability is estimated to be one in a thousand. Even if we deliberately practice, it will increase tenfold, which is a few percent. Even if the athletes are 100 times more intense than our training, the success rate is a fraction. Even if it is a 1/2 probability, the athlete will not use it. Although it will definitely score in the past, once it can’t pass, the high and slow ball will definitely lose the point. Then consider playing on the spot. Is the serve so hard to get the head away?

heloword
5 months ago

Thank you for your attention to table tennis. There are similar questions: why not just score the side and why not score every ball. The answers to these questions are not so precise. If you think about the net jumping back, the smaller the power is not the net, the larger the net will be longer. If you want to wipe the edges, the power angle is slightly inappropriate and out of bounds or won’t wipe the edges. So, how about the success rate in the game must be more than 50%, right? That training must not reach a 70% success rate? This is really too difficult. After all, people are not machines. Moreover, the athlete’s psychology, the slight difference in the weight of each ball is an influencing factor. Unless there is a player with non-human touch like Curry in table tennis, it will be difficult to realize your vision.

helpyme
5 months ago

This question is like asking “Why not use the edge to wipe the net to win?” This technology is very cost-effective. You think the level of the national team is superb, but their opponents, whether they are domestic or foreign, are also top-notch. In the case of several levels of the opponent, you can be 100% sure of winning and you can use some small skills. This is also a more casual attitude. But when the two sides are similar and need to do their best to fight, this kind of opportunism does not exist because When the ball crosses the net, no matter how short, low, or strong it spins, it is impossible to exceed that limit because of the existence of the net. If the ball crosses the net without wiping the net, there will be a certain distance, extreme distance. The ball will definitely be very high after the net retreat. This kind of serve can already be judged by your movements, ball speed, and the landing point of the first jump. After serving, the ball still jumps at the root of the net while it is attached to the net and then retreats. This is impossible unless the net is wiped. Regardless of the national team, professional athletes’ reactions and judgments are sufficient to receive the ball correctly and with quality. It is commonly known as sending the ball. Some people said that I didn’t make it clear, so draw a picture to make it clear; the situation you mentioned I was more impressed by the fact that when I was playing a game, the opponent had a backspin. I rubbed it and the other side rubbed it again. At this time, the spin was already very strong, and it was a wiping net. After wiping the net, the net was rooted in our table. I bounced around and retreated. My only reaction was to throw the racket to save the ball. The racket flew halfway and the ball had already withdrawn. In this case, there may be no solution to what you said, the other party has no response, and there is no chance of rescue. However, this situation is impossible for the serve, because the serve can only be re-sent at the end. In any competitive sports, it is not that the predecessors will not explore some opportunistic techniques, but the ones that have been left to the present have definitely passed through countless people. Actually, the most effective scoring technology at present will be innovated in the future. If the focus of competitive sports is on opportunism, the level of the national team will not reach the current level of amateur competition. It is quite interesting, but the success rate is at most 50 or 60%. For professional teams 1. Wiping the net and wiping the sides does not 100% win the ball, and even in some cases it will give the opponent a chance, such as slower ball speed and higher altitude, not a dead end, but there are still plenty of opportunities to save the ball. 2. The opponent is much beyond his own level, and will not give you the opportunity to wipe the net, such as always serving the ball. At this time, only consider going on stage first. The other party rushed a board, but he didn’t respond. Why did you talk about wiping the net? It can be saved or become a chance ball. Nothing is saved or the chance is very small; therefore, the cost-effectiveness of this technique is very low. It is fine to play and practice in the amateur, but if you focus on this, the serious technique is definitely Will go down

sina156
5 months ago

I realized a way of serving the ball by myself, that is, when the racket is served, the racket quickly moves forward to the right. The played ball will turn, and then the opponent will slap it stupidly, and the ball will fly out to the side. By this serve I completely abused my girlfriend at the time. Then I ran into a classmate who knew how to fight, and easily pulled it back for me. Also patiently told me that serving is not good, the speed of the ball is too slow, and the serving action is too obvious. The ball that jumps back should be the same. If you want to draw this kind of ball, the act of serving must be very obvious. It’s okay to tease a date who can’t play ball. Your opponent will thank you if you still do this on the field.

yahoo898
5 months ago

From a physics point of view, this problem can also be understood. First of all, the rotation speed of the ball should have a limit, and the rotation also has the problem of air resistance. I remember that the resistance seems to be proportional to the square of the speed, so under the existing equipment, this rotation does not It won’t be abnormal to that extent, it’s even impossible to be more abnormal than the ball machine. You can try to hit the ball machine. The ball from the machine spins very well. Secondly, there is a contradiction between impact and friction. If you want the ball to stay longer, you need to More impacts, but more impacts, less friction, and affect rotation. The two need to be balanced, and it is impossible to enlarge the rotation infinitely. (The principle of the ball machine mentioned above is actually to use rubber to clamp the ball to serve, which is better than illegal. The resultant force of the ball will turn) Again, consider the arc of the ball, whether you are serving or receiving it normally, if you want to bounce the ball, then the arc of the ball should be more vertical. The better, that is, there cannot be too much forward momentum, but how do you do this? You must know that the table tennis table has a length, and it can only be done if it is short from the table (the serve cannot be in the table, And the spin of the ball will be weakened after a jump). Of course, the arc can also be increased to make the final landing approximately vertical and jump directly back. However, a high close tennis ball itself is very dangerous, unless it is jumped up. It hits the net directly, but this is too difficult, because the higher the ball, the faster it falls and the faster it rebounds. The net is so high. If you want to hit the net directly after rebounding, it means the speed and fall. The table speed must have a certain relationship, and by the way, it is not that the higher the speed, the greater the deviation of the direction after the ball falls, because the ball that rotates too much will slip between the table and the table, and the sliding friction is much smaller than the static friction. So in summary, in order to achieve the effect you said, there are only very few cases of short swings, and it is only a theoretical possibility without considering the limits of human action; I think that it may be possible to do it in another situation. This effect is a super-rotation downward spin to the sky. People who understand the spin should know that this is possible, but first you have to do this and then you have to be so accurate…

leexin
5 months ago

The first two sentences can be achieved, but the latter two sentences show that you do not know the abilities of professional table tennis players. First of all, I can clearly tell you that sending this kind of ball is very simple for professional players, but for a rebounding serve, it needs to meet two requirements: 1. Strong spin, needless to say. 2. A relatively slow ball speed, because you are talking about rebounding at one jump. Once the ball speed is fast, it will bounce forward directly because of inertia, and then rebound when the speed slows down. This kind of tortoise speed can be a direct counterattack to the professional players’ reactions and skills, and it can also be swiped back if it doesn’t help. Anyway, it’s just a goal. And before the serve, the players are the most focused, staring at your racket and the ball, they are also very accurate in judging the rotation and speed of the ball, so it is better not to send this kind of delivery.

greatword
5 months ago

Let me talk about whether it can be done. The answer is yes, but why not do it? Because serving this kind of ball has a degree of difficulty (there is a certain turnover rate), the second is that this kind of ball is inevitably high. Third, if there is no change in the length of the serve, after the opponent eats the first one, they will stand very close. As soon as the ball rises, it will directly hit the table + twist + bounce. However, professional players often use this trick against amateurs and rookies. Suddenly hit the sky, and then the ball fell directly behind the net. But this trick doesn’t work for the profession. Others just stepped up and shot to death. The reaction speed, consciousness and footsteps of professional players are not comparable to amateurs and rookies.

loveyou
5 months ago

In theory, it is okay to make the ball jump back to the net, but it is difficult to hit the net and this kind of ball is useless for the players in the various table tennis matches you can see on TV. Serving regulations require that the ball must be served outside the baseline. In other words, the ball is almost four feet away from the net. You need to give the ball enough speed and height to jump over the net on this basis, and then give the ball enough spin. Then there is a contradiction. To give the ball enough rotation, there must be enough friction, enough friction, enough positive pressure on the ball and enough force in the tangential direction, but if the positive pressure is enough, the force in the tangential direction must be enough. If it is enough, the ball will have enough power to pass through the center of the ball, and the speed of the ball will be fast and it will not bounce back.

strongman
5 months ago

My personal experience: The text may have a literary element, but the facts are not exaggerated. When I was studying, the school team also had a certain level. The level is quite high. Of course, there is still a certain gap between the level of my departure from the school team. This gap means that I have shot more than a dozen rebounds in a row, and the female members of the school team have no pressure to pick up. The female player is practicing cuts. But she doesn’t need to step back and cut her back, just push it back. In other words, I can shoot more than a dozen shots in a row without shooting, which is also a highlight moment that I often blow in the future-although the main reason is that the ball is delivered well, But I can’t be too useless, right, as for the male players… No, in fact, the other female players, although they can beat the chipper sister, they can’t make me attack more than ten rebounds in a row. -I don’t know who has the best ability to win, but I have to say that they are not as good as their chopping sisters. Of course, these are amateur students with professional backgrounds, the ball we played. , Not a ping-pong ball: Although it is the same physically, it is definitely not a representative student in sports. He also went to a major sports school, and then was admitted to our university-in fact, the school team players mentioned earlier are basically admitted instead of relying on sports performance, because for them, table tennis is compared to the volume. With the introduction of cultural classes, the former is more difficult. They would rather fight with us in cultural classes than with Jike and the others. Well, this classmate who had gone to a major sports school became the chairman of our table tennis club. He has a serve, throws it high, the racket cuts the bottom of the ball flat, and serves a short shot. The ball will jump back on our table, we can only watch it fly back… We are at a loss… The rookie who is a bit higher than me can be prepared for it and go up quickly to pick this up. The ball, in fact, there are still opportunities. But he will watch you when you are preparing to take the stage. Suddenly there is a long run for the ball. There may be a god who may have heard my persistent thoughts and finally arranged him (the chairman of the table tennis club) and her (the chopper sister). On a table. He slapped his opponent for hundreds of boards, and when he fell behind 2:9 without any suspense, he raised his hand to indicate, he breathed a little, picked up the ball, looked up to the sky, and looked at it for a long time… He sent that The ball is lower than usual and spins more. Well, what do you say in martial arts novels? I saw clearly and distinctly that he served the ball and she walked forward gently, like a lazy girl bathing in the afternoon sun in the living room; the racket in her hand suddenly became blurred, as if it had become An idle book that is somewhat old. She just walked up like that, waved the idle book a little boredly, turned around gracefully, and walked back. Together with the onlookers, he watched the ball bounce off a parabola and flew beyond the baffle…

zhiwo
5 months ago

Because it’s useless. In actual combat, the close distance between the tennis racket and the racket is too short to create a particularly strong downward spin, unless lucky to wipe the net. Even if the chipper can create a very slow spin, the opponent can run to the table in one step because the ball flies too slowly. Moreover, from the perspective of the parabola principle, although the backspin ball can use friction to prevent the ball from jumping forward, it cannot control the ball from jumping upward. Unless your ball comes close to the net, the height of the second jump must be higher than the net. The opponent has enough time to figure out how to kill you. You put a short position in the far station, and smash at a big angle when you are near the station.

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