IMPACTS OF WEIGHT TRAINING ON PHYSICAL FITNESS IN TABLE TENNIS

ABSTRACT Introduction: Sportive physical fitness is the capacity to accomplish of physical or muscular activity in a satisfactory way and its variables for excellence include corporal composition, flexibility, force, and muscular resistance. Weight training generates benefits in the musculoskeletal system and is believed that with its practice there is some impact on the athletes’ physical fitness. Objective: Study the impacts of weight training on the physical fitness of table tennis athletes. Methods: Sixteen professional table tennis players were selected for this study and randomly divided into a control and an experimental group. The control group maintained the existing table tennis training program, and the experimental group received additional weightlifting training using 30% maximal strength based on the existing training. Relevant fitness data were collected before and after the intervention, analyzed, and discussed statistically. Results: The time of the Illinois sensitivity test in the experimental group was reduced to 17.20±0.23 s, a reduction of approximately 0.43 s, while in the control group, it was approximately 0.08 s. As for the hexagonal ball sensitivity test, in the experimental group it was reduced to 0.52 s, while in the control group, the reduction was 0.175 s. Conclusion: In table tennis training, weight gain can improve training efficiency and optimize the competitive level of table tennis players. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.


INTRODUCTION
Table tennis is well known in China.It is a well-deserved "national ball" in China.It is in a very high position in China.It is also a popular ball sport in the world.China's outstanding athletes have made outstanding achievements in the major international table tennis competitions and created brilliant historical achievements. 1Table tennis can be seen in every community in Chinese cities, so it can be seen that table tennis is very popular in China.As we all know, the five competitive elements of table tennis are speed, strength, rotation, landing point and arc, and the most important physical quality index for athletes to practice these five elements is agility. 2 Sensitive quality refers to the ability of people to coordinate, flexibly, quickly and accurately complete actions under various sudden changes in the outside world.It is the comprehensive performance of people's physical quality and various sports skills. 3The important physiological basis of the sensitive quality is the comprehensive analysis ability of the human cerebral cortex when conducting neural activities.Therefore, the sensitive quality is affected by genetic factors, such as gender, age, height, fat and thin, these inherent factors of the body will affect the directional movement, and the proficiency of the movement technology, the strength and extensibility of the body muscles are also the main factors that affect its ability. 4The evaluation of the sensitive quality should be based on the judgment, reaction ability and the ability to maintain balance when completing the action, and combine various sports qualities and sports skills under different external conditions, so that the existing physical quality can be effectively applied to practice. 5In view of the above description, this paper takes 16 players of a professional table tennis club as the research object to explore the impact of weight training on the sensitivity of table tennis's directional movement. 6I hope that through the experimental results, we can optimize the existing table tennis sensitivity training methods, make the table tennis turn to a higher level of movement, improve the competitive level of table tennis players, so that the players of table tennis clubs can achieve better results. 7

METHOD
Sixteen table tennis players from a professional table tennis club were selected as the research object, and were divided into experimental group and control group according to the form of random sampling.The study and all the participants were reviewed and approved by Ethics Committee of Zhejiang A&F University (NO.ZJAFU21F05).Their height and weight data are shown in Table 1, p>0.05, indicating that there is no significant difference.It is proved that the selection of experimental objects in this paper will not interfere with the experimental results.
The experiment adopts the method of control experiment.The goal is to influence the sensitivity of table tennis's directional movement.The variable design is whether to carry out weight-bearing training.Therefore, during the whole experiment, the control group kept the existing table tennis training program unchanged, and the experimental group increased the weight of the maximum strength by 30% on the basis of the existing, and adjusted the overall weight in the form of sandbags and resistance bands, so that the weight of each athlete was 30% of its maximum strength.During the whole process of sports training, the experimental group and the control group were carried out according to the existing training program of the club, and their training time and training content.As well as the daily work and rest, diet, etc., are uniformly arranged by the club.Through closed training, the interference of unrelated human factors on the experimental results is minimized.
Before and after the experiment, the data of table tennis players were measured.The duration of 30m running, the distance of standing long jump and the distance of triple jump were selected as the indicators for judging the physical test of table tennis players; The duration of the cross-quadrant jump, the number of repeated leaps and the time of "8" word stepping were selected as the judgment indicators of table tennis players' directional movement; The Illinois sensitivity test time, the hexagonal sensitivity test time and the T-type running sensitivity test time were selected as the judgment indicators of the sensitivity movement of table tennis players.Through the summary and collation of the data before and after the experiment, Excel and SPSS software are used to summarize the data and sort out the tables for the convenience of subsequent research.

Impact of weight-bearing training on the basic situation of table tennis players
Before the experiment, there was no significant difference between the experimental group and the control group in three aspects: the duration of the 30m run, the distance of the standing long jump and the distance of the triple jump.According to the data in Table 2, P>0.05 indicates that there is no significant difference, and the physical fitness of athletes will not affect the experimental results.
Table 3 shows the data summary after the experiment.After the experiment, the 30 m running time of the experimental group was shortened to (4.15 ± 0.1367) s, and the shortened time was about 0.402 s, while that of the control group was shortened to (4.36 ± 0.2315) s, and the shortened time was about 0.222 s.The distance of standing long jump in the experimental group was increased to (2.72 ± 0.0365) m, and the distance was increased by about 0.067 m, while the distance in the control group was increased to (2.59 ± 0.0764) m, and the distance was decreased by about 0.059 m.The distance of the standing long jump in the experimental group was raised to (7.79 ± 0.1295) m, and the distance was about 0.193 m, while the distance in the control group was raised to (7.55 ± 0.1914) m, and the distance was about 0.067 m.From the intra-group comparison, it can be seen that after the experiment, the indexes of the 30-meter run, the standing long jump and the triple jump in the experimental group and the control group have improved, indicating that any training method can play a certain role in promoting the improvement of the athletes' quality level.Through the comparison between groups, it can be seen that the proportion of athletes in the experimental group is higher than that in the control group, indicating that the efficiency of weight training in improving the basic indicators of athletes is better than the existing training methods.

Effect of weight-bearing training on the sensitivity of table tennis's directional movement
The characteristics of sensitive quality are speed, accuracy, coordination and resilience.Among them, the speed and explosive force of athletes' movement, reaction and discrimination are the main factors affecting speed; Athletes' own body feeling, space geometry feeling and their own control of body muscles are the main factors that affect the accuracy rate; Athletes' reserve of motor skills and the degree of hard work in their own training are the main factors that affect their own coordination; Under the sudden influence of the outside world, athletes can quickly adjust themselves and have a high response ability, which is the standard to measure the far mobilization of strain.
Before the experiment, the experimental group and the control group had little difference in the three sensitivity indicators of cross-quadrant jump time, the number of repeated crosses and the "8" word step time, and the three sensitivity indicators of Illinois sensitivity test time, hexagonal sensitivity test time and T-type running sensitivity test time.From the data in Table 4, it can be seen that P>0.05, indicating that there is no significant difference, and the athletes' own basis of directional movement and sensitivity will not affect the experimental results.
Table 5 shows the data summary after the experiment.In the aspect of direction change movement, after the experiment, the time of cross quadrant jump in the experimental group was shortened to (6.44 ± 0.1084) s, and the shortened time was about 0.324 s, while the time of the control group was shortened to (5.73 ± 0.0663) s, and the shortened time was about 1.058 s.The optimization effect of the experimental group was not as good as that of the control group, indicating that the experimental design in this paper had certain defects in the cross quadrant jump index.The number of repeated crosses in the experimental group increased to (48.41 ± 3.2158), the number of increases was about 4.253, and the number of increases in the control group increased to (12.86 ± 0.0678) s, the number of increases was about 0.055.The optimization effect of the experimental group was much better than that of the control group.The time of "8" stamp in the experimental group was shortened to (12.80 ± 0.1132) s, and the shortened time was about 0.174 s, while that in the control group was shortened to (12.86 ± 0.0678) s, and the shortened time was about 0.055 s.The optimization effect of the experimental group was better than that of the control group.
Through the summary and comparison of the data, it can be seen that after training, the athletes' directional movement indicators and sensitivity indicators have improved in the experimental group and the control group.From the perspective of the extent of improvement, the improvement effect of the experimental group is better than that of the control group, which shows that adding a certain amount of weight-bearing training to the existing table tennis training mode can better stimulate the physical quality level of athletes and improve the training efficiency of sports training.

DISCUSSION
Table tennis, as a major antagonistic event, is smaller than football and basketball, so its movement speed is faster, its skill is stronger, and its playing method is also changeable.The technical actions of playing table tennis mainly include forehand, backhand, pull and push, and other skills, combined with the athlete's pace skills, to give play to the strength of the ball.In table tennis, we mainly pay attention to the quality of agility and speed.In the match, we mainly pay attention to the use of fast, accurate and firm strokes and feet.There are scientific data that show that athletes have developed a very effective training method to improve the strength, sensitivity and speed of the body: weight-bearing resistance training.This kind of training can enhance the physical movement of athletes, and then improve the performance of athletes, and enhance the sensitivity of athletes to a certain extent can reduce the probability of injury in sports competition.With the change and improvement of table tennis rules, the pace of table tennis competition is relatively much faster and the competition is also much more intense.Under such external conditions, athletes must have excellent physical fitness, so that they can stand out in this fierce competition.
When athletes show their agility, most of them change their movements or positions through the performance of their own strength.Therefore, their muscles perform better than the strength assembly.Some of the senses in the human body are related to sports.Therefore, in the process of sports, athletes must have good sensory state, so that athletes can make quick and accurate judgments in a very short time under the sudden influence of the outside world, so as to solve the impact of the outside world.Therefore, athletes with good sensors will also have a good impact on their sensitive quality.Only athletes have a good sense of body muscle and body control, so that they can feel the changes in space when exercising, and can cope with a variety of external influences through the adjustment of their own muscles.Through unremitting training, the more skilled the athletes master the technical movements, the more stable and coherent the movements will be in our movement process.

Table 1 .
Basic information of the research object.

Table 2 .
Basic information of the two groups of athletes before the experiment.

Table 3 .
Training of the two groups of athletes after the experiment.

Table 4 .
Basic information of the two groups of athletes before the experiment.

Table 5 .
Training of the two groups of athletes after the experiment.