The Research of CAS in Athletic Training

Abstract. The literature method， logical analysis of the structure of the traditional training mode are based on the analysis of the CAS training mode processes and CAS training system， aiming at using computer-aided training system to combine all kinds of data together. By the analysis to help summarize the law， prompting it to increase to the theory by empirical scientific examination. Conclusion： Under the support of the computer-aided training， you can use the biomechanics multidisciplinary training science and information science knowledge to improve the level of training and training efficiency to overcome the defects of relying solely on the experience of training； Under athletes individuals conducted personalized training， coaches can choose the most fastest way to achieve the highest competitive level of the human body.

Key words： sports training； CAS technology； athletic training； training mode

1.Foreword

CAS （Computer Assistant Sport） is the abbreviation of the computer-aided movement and is IT integration products. The CAS technology contains computer graphics technology， optical， mechanical and electronic integration of intelligent test technology， video processing technology， the Internet technology and large-scale database management. Computer simulation technology can reproduce training process of athletes， training intent of coaches， teaching experience of PE. teachers and organization program of managers， so as to achieve an experimental technology discipline of the sports system’s analysis， explanation， prediction， evaluation， organization [1].

Information technology， especially computer technology plays an increasingly important role in today's competitive competition and training. In order to tap the potential of the human body， modern sports needs science and technology continue to intervene. This requires the integrated use of related disciplines of sports science knowledge， and the adoption of systematic and scientific methods to study the inherent law of sports. The application of CAS technology is a research work carried out for the realization of such a goal. The overall goal is： under the support of computer-aided training mode， sports training， video processing， statistical analysis， smart technology ， simulation technology and information science are organically combined to provide a powerful tool for the development of the training， and also expand the application space for information science. On the basis of the computer-aided training， we collect data in a large scale， analyze the training data and simulation results of the training to promote the training experience into theory， and to verify whether some training methods are reasonable or not.

This article is discussed this hot issue of how to combine computer with training practice， which gives us a computer-aided training mode. Finally the discussion of this training model will have some effects on the development of the training.

The drawbacks of traditional training mode

As domestic economic and technological conditions is relatively backward； athletes， coaches， and athletic personnel lack expertise， resulting in the main features of our sports training mode performance， which are paternalistic help， emphasis on experience and centralized management training [2] . Traditional training mode process （shown in Figure l）， which is a typical negative feedback system. The negative feedback system is a simple structure， and it is easy to be mastered and used by coaches， regardless of various types of interference in the training process， such as mood changes and injuries， etc.. By the negative feedback regulation， we are able to exclude these interfering factors [3]. However， this training mode is easy to overlook the personality characteristics of athletes. On the one hand， high-level athletes accepted methods of training like other athletes， but not for its own characteristics to be adjusted. It is easy to lead to its stagnating achievement. On the other hand， for the non-linear system， a simple negative feedback method can only find local maxima. The body of athletics training is a typical non-linear system. The traditional training model is very difficult to use the fastest way to achieve the highest competitive level of the human body.

Figure1 processes of the traditional training mode

2.The Research Of cas In athletic training

The computer provides the unlimited data storage capacity for us firstly.， which can record an athlete's all the trainings and competitions completely in his or her life. We adopt the XML technology and define a set of sports data and marks， which can be used to achieve the above functions. As an auxiliary training Software platform， it can put the physiological and biochemical indexes analysis method and the content of the training from books into the software to help coaches learn expertise in the management of the daily training. On the data storage platform， you can also further these data to analyze， find the characteristics of the athletes， assist to develop training programs for each athlete， summarize the law of sports training， and experience verified. Computers rely on its powerful computing capabilities， by calculating to simulate real complex events on the basis of some of the basic laws of physics. This computer simulation technology can be difficult to achieve in reality event， but in the computer simulation can have results， so it can reduce training costs greatly， shorten the training time， break the bottleneck in the training rapidly. With the support of computer simulation technology， we can let athletes jump out of the constraints of the local maxima more easily in training results aspect.

2.1 Cas training mode processes

Figure 2 shows a computer-aided training of the process by the two closed-loop； the outer ring is an intermittent type of positive feedback loop， the inner loop maintains the negative feedback loop of the traditional training mode， and the two rings are nested together.

The outer ring is a new circuit， from the intermittent role， including "regular training routine "---is a vague concept， which includes the training elements of the means of training methods， training programs and technical movements. "Virtual simulation and mechanism" of athletes competitive level module， which accesses to data， so simulation changes regular training routine changes to achieve change training elements， and jump out of the local maxima of purpose.

The inner ring in the feedback loop is added only two modules of the "computer-aided analysis” and "historical database" than the traditional process [4]."Computer-aided analysis" module in the support of historical database， which use of physiological and biochemical indexes analysis to analysis of the athlete's physical condition for the coaches； "historical database" records athletes' all previous training content and effects data for analysis.

Figure 2 processes of the CAS training mode

2.2 The Structure of CAS training system

Computer-aided training system （Figure 3） and its structure is composed of several parts of the analysis， storage， display and simulation.

The structure of the system is divided into three parts. The first part is a subsystem of training management， which treats database as the core， including data entry and training program management. what's more， information management is primarily responsible for the day-to-day training； The second part is a subsystem of decision support ，which treats the physiological and biochemical indexes analysis as the core to help coaches supervise athletes' status； The third part is the subsystem of simulation ， so which treats simulation as the core to improve training elements to help coaches. Training Management subsystem is the core of the entire system， mainly corresponding to the historical database， decision support subsystem corresponds to the inner loop feedback loop， the emulation subsystem corresponds to the outer ring.

System input data contains training results， the instrument recorded data as well as biochemical indicators. There are also multi-channel to put in data， which can be manually recorded，or automatically credited to the database through the network. Systematic output by chart is chief methods.

Figure 3 functional block diagram

2.3 the advantages of computer-aided training

As can be seen from Figure 2， the inner ring of the computer-aided training process retains the traditional training mode negative feedback loop，the advantages of the traditional training mode stability and anti-jamming. The physiological and biochemical analysis module of the new training mode can automatically introduce the Modern Training and biochemical knowledge into the training management to avoid empirical error by coaches， in case who are not very familiar with these knowledge.

The historical database module records historical data of each athlete， so at the same time， the same state of two athletes do not have the same results， which indicates that the system has the advantages of personality. That is to say， the system， which is based on historical data， is to analyze the athlete training effect and make decision for own training program. Such personalized training mode is suitable for high-level athletes. In the Optimization Theory， we often use "simulated annealing" to find the maximum value. The rough idea is that if the finding of the excellence gets into local maxima， it will change the initial value of a certain probability to find new optimization [5]. Under Sports training， local maxima is the metaphor of the athletes' competitive level， which is stagnant. At this moment， coaches often change elements of conventional training methods and training technical movements to let the athletes step out the platform. At this time， the coaches have been passively adopted this way of thinking to solve the problem. However， this way is a big risk. The reason is that a sudden change in the technical action may hurt the athletes， and also need a relatively long time to adjust. If we give these works to the computer， and use simulation technology to help athletes to simulate the motion results in a new training elements， which will be a small cost to solve the problem of local maxima.

3.Summary

Computer science disciplines as a tool and does not have a direct result of the development of the training. However， through the collection， storage and analysis of training data， it can provide auxiliary guidance in athletes training， which has set up a connected bridge of training practice， training theory and many other basic disciplines. Under this bridge， all kinds of disciplines can have mutual promotion and common development.

We usually have to pay more consideration than others to train elite athletes. To reduce this cost needs to avoid over-reliance on the traditional training experienced guidance， and use many results of the modern sports research to improve and develop the potential of athletes and avoid to make in vain efforts in the training. Computer-aided training system is well adapted to the trends of today's sports. It can put training theory into training practice to promote the improvement of the level of training， and contribute to the Training of their own development.

References

[1]WANG Yugui. On the Application of CAS in Physical Training [J] . Journal of Hubei Sports Science， 2006， 25 （ 2）： 193-195.

[2]TIAN Maijiu. Sports Training Theory [M]. Beijing： People's education press， 2000.

[3]Wu Qi. Automatic Control Theory [M] . Beijing： Tsinghua University press， 1992.

[4] Li Tianqing， Zhang Yi， Liu Zhi， et al. Research on ComPuter Aided Sports Training [J] Sports Science， 2003， 23 （ 1）： 78-81.

[5] AN Chaochen. research on Human Sport Load [M]. Beijing： People's education press， 1983.