|（1.Sports Science Institute，Tianjin Normal University，Tianjin 300387，China；2.Sports Science Institute，Fujian Normal University，Fuzhou 350007，China；3.School of Physical Education，Central China Normal University，Wuhan 430079，China）
Abstract: Doctoral sports science theses can reflect the condition and performance of high level academic re-searches in the sports science area within a certain period. Key words are an important constituent part of academic theses and the reflection of literature research areas and contents. By applying methods such as word frequency analysis, common word analysis and social network analysis, and by means of social network analysis software and information visualization software, the authors analyzed 1,952 key words in 546 doctoral sports science theses pub-lished in China between 1991 and 2009, sorted out the courses and characteristics of development of sports science researches in China, and finally predicted the future of development of sports science researches in China in such 4 aspects as boosting sports science research performance based on sports practice, realizing the balanced develop-ment of various disciplinary researches, forming a comprehensive community to enhance the overall strength of sports science researches, and moderately opening and strengthening transdisciplinary fusion.
Key words: scientific metrology；sport science；doctoral thesis；common word analysis；social network analysis；knowledge spectrum