Vision 2024- Olympic Science and Technology School’s ＂Technical and Tactical Articles＂ See yourself clearly and recognize the competition： Scientific training will arm the ＂super brain＂ with technical

Topic of this issue:The Paris Olympic Games is coming to an end, and China athletes have a perfect ending. The Olympic Games is not only a physical limit competition and a psychological game; It is also the result of high-tech assistance and accumulated training. How can technology help athletes improve their "strength"? What effect does it have on the skills, tactics and on-the-spot command of the stadium? How to help athletes strengthen their mental attributes, recover their bodies and prevent injuries?

The Olympic Games is not only a physical contest, but also a mental and spiritual contest.

How does the data model help athletes to correct their movements in table tennis competition? How to assist the coaching team to study opponents, capture fighters and adjust tactics in a noisy and changeable arena? How to design tactics and improve movements according to the characteristics of athletes in sprint events? In swimming events, how to use the "wind tunnel system" and big data to "tailor" athletes and set their own technical movements and tactical ideas? This issue brings you "technical and tactical articles".

Table tennis: big data analysis system, helping the "big devil" to strategize.

Every Olympic Games, the table tennis team bears the important mission and many expectations of the China Legion to win gold, and also gives birth to generations of "Big Devil" and "Hexagonal Warrior".

Table tennis seems simple, but it is flexible. The most basic actions are attacking, pulling, pushing, poking, cutting, twisting and tearing, and almost every action can be decomposed into forehand and backhand techniques. There is a relationship between different technical characteristics and playing methods.

In modern table tennis training, professional athletes train to swing thousands of times every day. In order to ensure the strength and action quality, the most common tool is the "digital magic mirror". It can quickly identify the human body, capture the athletes’ movements in real time, and connect them into a digital "stick figure" through the joints of bones. This allows athletes and coaches to observe the range of action and the angle of hitting the ball more intuitively; Through the dynamic labeling of knee joint, hip joint, shoulder joint and wrist joint, the athletes’ skills are corrected. At the same time, the host computer of the "Digital Mirror" can also store the action data of world champions or major competitors for coaches and athletes to observe and compare.

A chip sensor is installed under the grip of the player’s racket, which can collect dozens of three-dimensional data, including the player’s hitting strength, angle, speed, line and so on.

These can make athletes and coaches have a better self-awareness, and improve their skills and determine their tactical styles according to their own strengths and weaknesses.

The Olympic stadium is changing rapidly, especially after the 21-ball system is changed to the 11-ball system, the pace is faster and the conversion is faster. In the past, players with superior strength can no longer play at their own pace, but strive for every ball and go all out, even the "big devil" players are no exception.

Therefore, this requires more tactics and contingency. Table tennis competitions are usually noisy, and several tables are playing at the same time. Coaches need to study their opponents thoroughly in advance, and then adjust their tactics according to the situation on the field-for example, at which stage does the opponent have high morale and good state and need stalemate and defense? At what stage are there loopholes that need to be actively attacked and fully attacked? Which technology of the opponent is in a bad state recently, and it is necessary to attack it unprepared and break the weakness?

In the past, coaches could only watch videos and mark by impression. This will inevitably sacrifice the time of guiding training and the lack of accuracy. Nowadays, the "tactical analysis system" added by AI algorithm allows coaches to quickly retrieve more comprehensive and detailed data through computers or tablets before and during the competition-what is the competitive state of opponents during this period? Different balls, what action is used to score? What is the opponent’s main attack route during this period or this game? On which balls did you make more mistakes? These data can also form tables or pictures for coaches and athletes to see at a glance.

Athletes are in the front, and coaches are behind. This is the secret of China table tennis galloping in the Olympic Games, killing the quartet.

Sprint: digital time-sharing observation system, which assists athletes to "know yourself and know yourself" in all directions.

Let’s watch the sprint again. We have introduced how to evaluate and improve the burst speed and maximum speed of athletes. In fact, athletes should also formulate tactics before the game according to their own characteristics and opponents’ situation.

Usually, the score of 0 to 30 meters represents the explosive speed of athletes; The performance of 60 meters to 100 meters represents the maximum speed and sustained endurance of athletes. Different athletes have different advantages and different running methods-some people try their best in the first half and some people explode at the last moment. For example, Su Bingtian’s first 60 meters speed is even faster than Bolt’s.

In training, the "digital segmented timing system" is commonly used. It can divide the runway into several sections, record different nodes, let athletes try different running methods, and combine with the monitoring of physical signs data to determine the most suitable technical and tactical strategy for this athlete, and improve the short board technology.

Swimming: "Simulate water flow with airflow" to create "flying fish in water" in China Olympic Games.

Finally, let’s watch swimming. In this Paris Olympic Games, the China Swimming Team sent 31 athletes, including six Olympic champions, including Zhang Yufei and Ye Shiwen. China team broke the blockade of European and American athletes in swimming events, besides hard training, there was also scientific and technological assistance.

Swimming competition is very similar to racing competition such as running. However, the mutual influence of water temperature, water resistance and water flow between different lanes in the same swimming pool makes the influencing factors of swimming competition more complicated. In terms of training methods, there are "resistance training" and "overspeed training" similar to those we mentioned in running training-using hardware equipment to provide extra traction or dragging force in the water, and recording the changes of athletes’ speed, time and action range through sensors, completing the basic evaluation of athletes’ characteristics and level, and training and improving their level in a targeted manner.

In order to simulate the influence of water flow on athletes, the swimming team will also use the "comprehensive wind tunnel laboratory of sports training level". The wind tunnel laboratory was originally a tool to simulate the airflow change in the field of aerospace research, so as to design and calibrate the parameters for spacecraft such as airplanes and rockets. For water sports such as swimming, it is only necessary to adjust the conversion parameters between "air" and "water" to simulate water training.

Wind tunnel laboratory, through several high-power fans and complex air holes, creates "simulated water flow" The athletes lie prone on the equipment and test various swimming strokes in the airflow. The test screen can display the athletes’ physical data and the resistance, direction and change of "simulated water flow" in real time, so that the athletes can get used to the situation of various water flow conditions and prepare corresponding tactics and targeted training according to the situation.

In this Olympic Games, China Swimming Team set a new record for the total number of medals of China swimming in a single Olympic Games with 2 gold, 3 silver and 7 bronze medals and a world record.

Undeniably, behind the triumph of Olympic athletes, science, technology and scientific research teams have contributed greatly. But at the same time, the spiritual attributes and subjective technical and tactical abilities of Olympic athletes and coaches are the key to winning or losing. In the modern Olympic Games, participants should not only have strong physique, but also have a "super brain". (Wang Siyuan, commentator of the Economic Voice of the Financial Program Center of Taiwan)