In recent years, competitive aerobics has developed rapidly in my country, and the corresponding sports injury risks have gradually increased. A number of studies have shown that due to the characteristics of aerobics itself, difficult movement requirements, fast-paced music accompaniment and coherent coordinated movements, athletes will suffer sports injuries if they are not paying attention. Therefore, discovering the causes of athletes’ injuries in time and preventing them in time is crucial for improving athletes’ skill level and prolonging sports life. Through the functional movement screening (FMS) test, understanding young aerobics athletes’ insufficiency in trunk stability, joint flexibility, muscle extension, and core strength can further help athletes reduce the risk of sports injuries. Therefore, this article proposes a novel sports injury risk model based on big data technology and deep learning, which can effectively predict the risk of sports injury and can play a positive role in improving the quality of athletes’ movements and prolonging their sports life.

Teenagers are the future of our country, and their physical health has a great impact on the economic and social development of our country. In view of this, this study applied questionnaire survey, analytic hierarchy and situation analysis to construct the evaluation index system and hierarchical structure model of youth physical health promotion path, and used empirical analysis to analyze and deal with the key factors in the index system. The results show that the coordinates are (0.648, 0.648, 0.648, 654) located in the first quadrant, which indicates that the external opportunities and internal advantages have a high degree of matching; the effect of youth physical health management under the government mechanism is poor, but youth physical health management under the market mechanism needs to be established. The internal advantages of youth physical health management are relatively large, and the public management service market has great potential, and the market-oriented health construction. It is hoped that this study can provide certain reference for the improvement of Chinese teenagers' physical health.