各学科知识的更迭创新使得学科之间的知识流动现象越发频繁，而知识计量学的快速发展则为学科之间相互交流作用的交叉研究提供了新的方法和手段。即学科间的知识流动现象可以通过学科文献及参考文献构成的引文网络体现，并以此为基础探索不同学科知识的来源和去路。因此，本研究从知识流动视角出发，运用文献资料法、比较法、历史法、文献计量法、逻辑分析法、数理统计法等研究方法，对新中国成立以来体育学科与其他外部学科知识流动的规模、演变特征以及动力机制进行研究。研究结果表明：

1.建国70年以来，我国体育学科的整体知识存量不断增加，从总体上看可以分为两部分四阶段，改革开放前我国各项科学技术事业都不发达，处于学科萌芽发展期，改革开放后我国体育学科经历了知识储备成长期、知识指数爆发期、知识逻辑稳定期三个发展阶段。

2.从知识流动的规模上看知识流入量和知识流出量与体育学科的发展呈现正相关关系。体育学科整体的知识流入量在各阶段呈现指数级增长趋势，自引率受历史时期环境的影响呈现不稳定波动状态。但总体呈现上升趋势，从发展初期的独立性较弱的包容性较强的学科，逐步发展至独立性较强包容性较弱的学科。体育学科整体的知识流出量在各阶段呈现爆发式增长，于1999-2008阶段达到顶点，下一阶段出现回落，且呈现稳定状态，标准进入逻辑增长阶段；从被自引率上看，学科知识总体呈现较为封闭状态，学科地位不高，学术影响力较差，但从整体被自引率上看，呈现逐步稳定下降趋势，学科知识开放程度扩大，学科地位以及学术影响力认同感正在缓慢提高；从知识流动类型上看，70年的体育学科知识流动呈现平衡型状态，09-18阶段知识流动类型最具代表性，最符合当前体育学科发展规律，学科类型呈现知识流入型。

3.从知识流入的视角对我国体育学科知识流动特征进行分析，体育学科知识吸收的体量由建国初期的微弱，至改革开放时期的稳固上升并呈现爆发式增长趋势达到了目前较高的水平；吸收的广度逐步扩大，知识吸收内容由建国初期较为简单不明显，至较为复杂且清晰；吸收强度由建国初期的较小经过改革开放的洗礼达到并维持在高强度阶段。

4.从知识流出的视角对我国体育学科知识流动特征进行分析，体育学科各阶段知识输出的体量呈现指数式增长趋势，以改革开放阶段为转折点，体育学科知识体量爆发，知识输出体量增加，输出广度逐步扩大，输出强度持续增强。

5.体育学科与其他学科的知识势差是体育学科知识流动产生的根本原因。体育学科的知识流动机制受到内部动力和外部动力的双重作用。

The change and innovation of knowledge in various disciplines makes the knowledge flow between disciplines more and more frequent, and the rapid development of knowledge metrology provides new methods and means for the cross-study of the interaction between disciplines. In other words, the knowledge flow between disciplines can be embodied through the citation network composed of disciplinary literature and reference literature, and on this basis, the sources and paths of knowledge of different disciplines can be explored. Therefore, from the perspective of knowledge flow, this study applies research methods such as literature method, comparative method, historical method, bibliometric method, logical analysis method and mathematical statistics method to study the scale, evolution characteristics and dynamic mechanism of knowledge flow of physical education and other external disciplines since the founding of the People's Republic of China. The results show that:

1. Since 70, the founding of our country sports discipline increased overall stock of knowledge, the four stages in general can be divided into two parts, before the reform and opening up are not developed, the science and technology enterprise in our country is in embryonic development, after the reform and opening up our country sports discipline has experienced knowledge reserves growth, index of knowledge explosion, knowledge logic plateau three stages of development.

2. From the perspective of the scale of knowledge flow, knowledge inflow and knowledge outflow are positively correlated with the development of physical education. The knowledge inflow of P.E. subjects as a whole increased exponentially in each stage and the self-citation rate fluctuated unsteadily under the influence of historical environment. However, the overall trend is on the rise, from a relatively independent and inclusive discipline in the early stage of development to a relatively independent and inclusive discipline gradually. The knowledge outflow of P.E. discipline as a whole increased explosively in each stage, reached the peak in 1999-2008 stage, and fell down in the next stage and presented a stable state, and the standard entered the logical growth stage. In terms of self-citation rate, subject knowledge is generally closed, subject status is not high and academic influence is poor. Although the self-citation rate of physical education is still at a higher level compared with other mature disciplines, it shows a gradual and stable decline trend. With the expansion of subject knowledge openness, subject status and recognition of academic influence are slowly improving. In terms of the type of knowledge flow, the knowledge flow of physical education in the past 70 years presents a balanced state, and the type of knowledge flow in the period of 2009-18 is the most representative and most in line with the current development law of physical education, and the subject type presents the type of knowledge inflow.

3. From the perspective of knowledge inflow, the characteristics of knowledge flow of physical education in China are analyzed. The volume of knowledge absorption of physical education has reached a high level from a weak level in the early days after the founding of the People's Republic of China to a steady rise and explosive growth in the reform and opening up period. The breadth of knowledge absorption gradually expanded, the content of knowledge absorption from relatively simple and not obvious in the early days of the People's Republic of China to more complex and clear; After the baptism of reform and opening up, the income intensity reached and maintained at the high intensity stage from a small level in the early days of the People's Republic of China.

4. From the perspective of knowledge flows to our country sports discipline knowledge flow characteristics were analyzed, and the sports disciplines in different stages of the knowledge of the output volume showed a trend of exponential growth, reform and opening to the stage as a turning point, the outbreak of mass sports discipline knowledge, knowledge output volume increases, the output widening breadth, continue to enhance the output strength.

5. The knowledge potential difference between PE discipline and other disciplines is the fundamental reason for knowledge flow in PE discipline. The knowledge flow mechanism of P.E. subject is influenced by both internal and external dynamics.