With the implementation and advancement of national strategies such as“Healthy China”and “Sports Power,” there is an increasing need to enhance the quality of scientific fitness services for the general public. Based on an analysis of the conceptual framework and data relationships of multi-source data-driven intelligent fitness services from the perspective of the integration of sports, medicine, and engineering, this study focuses on key technologies underpinning these services. These technologies include AI-based hazard detection in public sports venues to ensure fitness safety, precise monitoring and intelligent guidance for effective fitness behaviors, technologies for the exchange, integration, and sharing of multi-source heterogeneous fitness data, and privacy protection measures for fitness data.

With the rapid development of artificial intelligence (AI) in recent years, it has already or is poised to implement multiple functions in e-sports, such as assisted training, assisted refereeing, and intelligent broadcasting. However, while AI drives the advancement of e-sports, it also faces corresponding risks of data pollution. For instance, useless player data may reduce the effectiveness of Character AI, outdated match data may compromise the timeliness of intelligent broadcasting, and fabricated officiating data may undermine the fairness of AI refereeing. To address these risks, the primary response strategy is to establish data governance rules in the form of laws and policies.. This involves establishing mechanisms such as the regulation of annotation types, data screening rules, and pre-set standard controls during three stages: data structuring, data screening, and the establishment of the data governance system. These measures ensure the usability and generalizability of collected e-sports data, extract data subsets that meet specific conditions, and ultimately achieve comprehensive prevention of data pollution risks through e-sports data governance rules.

Sports consumption is an important engine for expanding domestic demand and smoothing the domestic circulation of the national economy. This paper analyzes China's sports consumption pilot policy, selects panel data from 290 prefecture-level cities in China from 2014 to 2022, and uses the difference-in-differences model to analyze the impact of Chins's sports consumption pilot policy on urban socio-economic resilience as well as the transmission mechanism. From the research results, it was found that: 1) the sports consumption pilot policy has enhanced the urban social and economic resilience, and this conclusion still holds true after parallel trend testing, placebo testing, and PSM testing; 2) The mechanism test results show that the strengthening of urban social and economic resilience through the national sports consumption pilot policy mainly relies on the optimization effect of industrial structure and employment effect; 3) The heterogeneity test results indicate that different cities exhibit diverse characteristics when implementing the sports consumption pilot policy, and the effect of pilot policys on improving urban social andeconomic resilience is more pronounced in large-scale cities and eastern regions. It is recommended to continue implementing the pilot policy for sports consumption cities, fully leveraging the mediating effects of industrial structure optimization and employment effects, and paying attention to the regional heterogeneity of the sports consumption pilot policy in enhancing urban social andeconomic resilience.

Under the background of constructing China’s independent knowledge system, it is of great significance to explore the theoretical problems of constructing China’s independent knowledge system of sports training, improve the scientific level of sports training and promote the high-quality development of competitive sports. The research holds that the independent knowledge system of Chinese sports training is formed on the basis of learning from foreign advanced training theories and taking root in Chinese sports training practice, which has the characteristics of localization, innovation, systematization and practicality. The independent knowledge system of Chinese sports training science has experienced four evolution stages: initial exploration, independent innovation, systematic improvement and digital transformation. There are practical problems such as research paradigm valuing“qualitative” over“quantitative”, knowledge generation valuing “grafting” over“endogenous”, and theoretical application valuing “abstract” over “practical”. The research puts forward: 1) Based on the development frontier of sports training science in the world and the practical needs of China’s sports training field, adhering to Marxist theory as the guidance, planning the top-level design of the construction of independent knowledge system of Chinese sports training science with systematic thinking; 2) Build an academic community of sports training research to strengthen the organizational guarantee for the construction of independent knowledge system of Chinese sports training; 3) Improve the independent innovation ability of research subjects in the field of sports training, and the methods and ways of enabling the construction of independent knowledge system of Chinese sports training science by science and technology; 4) Promote the cross-disciplinary integration of“sports training +”and consolidate the talent base for the construction of China’s independent knowledge system of sports training.

Constructing the independent knowledge system of youth sports with Chinese characteristics is the systematic integration and profound summary of the theoretical research and practical experience of youth sports. This study uses the method of literature, logic analysis to explore the process of constructing the independent knowledge system of youth sports with Chinese characteristics. It is found that the independent knowledge system of youth sports with Chinese characteristics has formed a unique concept in the historical evolution, showing multiple connotation characteristics such as the human nature of growth needs, the pluralism of all-round development, the practicality of social integration, and the intersecting of knowledge penetration. On the basis of sorting out relevant researches at home and abroad, centering on the logic main line of following national strategy, adhering to goal orientation, consolidating institutional system, promoting mechanism innovation, basing on local practice, this paper puts forward the way to promote the construction of independent knowledge system of youth sports with Chinese characteristics: highlighting the strategic priority of national development of youth sports, promote the intersections of youth sports knowledge based on disciplines, the practice of local origin of youth sports theory, the application of multi-dimensional knowledge system of youth sports, and the openness of youth sports culture and education exchange.

The construction of independent knowledge system for school P.E. is an inevitable response to accelerating the modernization for Physical Education and Sport in China. Based on the construction of three major systems of disciplines, academic, and discourse, the value and implications of building an independent knowledge system for school P.E. in China have been elucidated. A profound understanding of the independent knowledge system for school P.E. in China from value theory, ontology, epistemology, and methodology: Adhere to the people-oriented stance of focusing on the comprehensive development of students; Emphasis should be placed on strengthening the scientific interpretation of school P.E. practice; Responding to practical issues related to the development of school P.E.; The unique path of deepening the inclusive growth of the knowledge system. In the future, the construction of independent knowledge system for school P.E. in China should focus on the people-centered values and strengthen the historical inheritance of theoretical ideas in school P.E.; Promote the excellent physical education and sports ideology of China and enhance the endogenous driving force of knowledge production; Deepen the understanding of school P.E. practice and consolidate the local supply of knowledge system; Drawing on global experience and promoting open and mutual learning of school P.E. knowledge content.