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A272: IMU-Based Multimodal Framework: Effects of Mental Fatigue on Technical Movement Stability in Youth Football Players
No full textMental fatigue has a potential negative impact on athletes\u27 technical skill stability, yet quantitative assessment and mechanism analysis in youth football contexts remain insufficient. This study aims to establish a multimodal monitoring framework based on inertial measurement units (IMUs) to uncover dynamic variation patterns in sport-specific technical skill stability among youth football players under mental fatigue. Twenty-eight elite male youth players from professional academies (aged 15.8±1.3 years) underwent standardized cognitive loading tasks to induce mental fatigue. A distributed IMU sensing system (7-node configuration, 200Hz sampling rate) synchronously captured 17 kinematic parameters across three core technical skills (dribbling, passing, shooting), integrated with heart rate variability (HRV) and environmental perception data to construct a multimodal dataset. Nonlinear time-series analysis and multiscale feature extraction methods were employed to examine motion stability degeneration patterns under fatigue conditions. The findings revealed significant differential degradation in ankle joint stability (p\u3c0.01) and trunk rotation control (p\u3c0.05) during dribbling and shooting execution under induced mental fatigue. Biomechanical energy transfer efficiency decreased by 18.7-22.3% across technical skills, while environmental awareness response latency increased 23.5% (p=0.012). This study proposes a technical stability fluctuation index (TSFI) integrating key temporal-spatial parameters, demonstrating a strong negative correlation (r=-0.82) with mental fatigue levels. The IMU-based framework achieves 91.4% accuracy in real-time fatigue monitoring through machine learning validation, providing novel quantitative methods for assessing and intervening in cognitive-sportmotor integration in youth football training
A052: 3D Suspension Printing-Based Personalized and Customized Swimming Earplugs in Physical Education
No full textSwimming has been evident to enhance teenagers’ health and enjoyment; meanwhile, swimming class plays an important role in physical education. 3d printing technology in customized equipment, accurate rehabilitation, and other sports fields is gradually realizing a wide range of applications. Thus, this project focuses on the problem of water entering the ear canal during swimming. By producing personalized and customized swimming earplugs, we further verify their psychological and physical impacts on swimmers, as well as their effects on the safety of swimming classes. Method: Firstly, we explored the material properties of antibacterial earplugs and the 3D-printing parameters. The ear canal models of subjects are obtained via 3D scanning technology, and personalized earplugs are fabricated through 3D printing suspension technology. Secondly, thirty young teenagers (15 females, 15 males) were recruited from a swimming class in a Chinese university and arranged for them to complete 6 swimming lessons while wearing the earplugs. The participants\u27 experiences with the earplugs, physiological and physical impacts, changes in swimming performance, swimming willingness, and the effectiveness of safety education were measured by a battery of validated questionnaires. We have realized the personalized customization of swimming earplugs with PDMS and nanosilver (Ag) based on 3D printing technology, which exhibit excellent physical and chemical properties, and applied for a national patent. Significant differences were identified before and after training with earplugs, Cronbach\u27s α=0.8, p \u3c 0.05. The Likert scale showed that users achieved a mean score of 85±6.8 post-test, a significant improvement compared to the pretest of 76±8.3. In addition to this, other measures show a positive impact on swimming safety. Conclusion: Personalized earplugs are not easy to fall off during the wearing process, isolate external water into the ear completely, block external sound, and improve the safety of swimming. Swimming beginners wear earplugs in the ear canal, reducing the water pressure caused by the posture change on the ear canal sting, reducing psychological pressure, and enjoying the process of learning to swim. Future research may optimize the performance of the product, apply it in more scenarios, and test this conclusion
A284: Machine Learning-Based Prediction of Adolescents\u27 Quality of Life
No full textThe impact of school, family, and healthy lifestyle behaviors on adolescents\u27 quality of life (QoL) has received increasing scholarly attention. This study aims to develop an interpretable machine learning model for predicting adolescents\u27 QoL based on three key dimensions: school, family, and health-related lifestyle factors. Random Forest, Decision Tree, Gradient Boosted Decision Tree, Ridge Regression, Support Vector Machine, Multilayer Perceptron, AdaBoost, Voting Classifier, and K-Nearest Neighbors were employed to identify the optimal predictive model for QoL outcomes. To elucidate the nonlinear contributions of variables across dimensions, permutation feature importance, partial dependence plots (PDPs), and Shapley Additive Explanations (SHAP) were utilized. A total of 20,237 eligible adolescents (aged 10–25 years) were randomly assigned to training and validation sets for model development and evaluation. The Random Forest model achieved the highest overall performance, with an accuracy of 79.55% on the validation dataset. Within the comprehensive model, the key predictors of QoL included self-regulation (SR), interpersonal relations (IR), aggressive-nervous tendencies (AN), parental co-exercise (PE), sleep duration, and academic skills (AS), with respective contribution weights of 0.0157±0.0039, 0.0142±0.0038, 0.0071±0.0032, 0.0064±0.0031, 0.0050±0.0016, and 0.0043±0.0033. Specifically, improvements in SR, IR, PE, sleep duration, and AS—or reductions in AN—were associated with enhanced QoL among adolescents. Dimension-specific modeling revealed that within the healthy lifestyle dimension, screen time, physical activity, and sleep emerged as the key determinants of QoL. In the family dimension, parental co-exercise, parental relationship quality, and parental education level were identified as the most significant predictors. In the school adaptation dimension, interpersonal relations and self-regulation were found to be the primary influencing factors. This study underscores the effectiveness of machine learning approaches in identifying the multifactorial determinants of adolescents\u27 QoL. The findings highlight that regular participation in physical activity—alongside sufficient sleep, supportive family dynamics, and positive school adaptation—plays a pivotal role in promoting improved QoL outcomes. These results offer empirical evidence to inform educators, policymakers, and public health professionals in the development of targeted interventions aimed at enhancing adolescent QoL
A068: Research Progress on the Mechanisms of Exercise Preconditioning in Promoting Neurological Repair After Stroke
No full textStroke is a neurological disorder characterized by acute focal damage to the central nervous system due to vascular causes stands as a leading cause of disability and mortality worldwide. Two pivotal strategies to mitigate the global burden of stroke include the prevention of both initial and recurrent strokes, as well as the effective treatment of acute stroke patients to minimize fatalities and disabilities. Exercise, often regarded for its safety, cost-effectiveness, ease of implementation, and efficacy as a non-pharmacological intervention, has garnered widespread attention and is considered a crucial component in reducing stroke risk and aiding in stroke recovery. However, pre-stroke exercise preconditioning (EP) interventions have demonstrated superior preventive and mitigating effects. Consequently, understanding the neuroprotective mechanisms of exercise preconditioning in stroke is of paramount importance for the clinical translation of non-pharmacological treatments. Method: Using keywords such as “Stroke”, “exercise preconditioning” and “exercise pretraining”, we searched multiple databases such as PubMed and CNKI using the retrieval timeframe spans from the inception of the database up to the year 2024 included literature was systematically collated and analy. The predominant modality of EP employed in the reviewed studies was treadmill running, with less frequent utilization of swimming, voluntary wheel running, or a combination of various exercise types. Aerobic exercise constituted the primary form of EP, with a smaller proportion of studies utilizing high-intensity interval training. The exercise interventions were typically administered 5-7 times per week, with each session lasting no more than 30 minutes, and the total intervention period generally spanning 3-4 weeks. EP ameliorated brain injury and neurological deficits in stroke animals by restoring the structure and function of the cerebrovascular system and the blood-brain barrier, reducing neuronal cell death, inhibiting oxidative stress, and attenuating neuroinflammation. These beneficial effects were partially attributed to alterations in gut microbiota, modulation of the MAPK signaling pathway, and mitigation of excitotoxicity. EP exerts a positive impact on outcomes in animal models of stroke. However, the underlying mechanisms are complex, and the employed exercise protocols are relatively homogeneous. Future research should focus on translating these findings into clinical settings and evaluating the efficacy of diverse exercise intervention strategies to optimize therapeutic benefits
A227: Eliminate or Evolve: Digital Transformation of Paris 2024 Olympics Under Olympic AI Agenda
No full textThe International Olympic Committee (IOC) has been promoting sports digitalization since the early 2000s, with the Olympic Agenda 2020 and the Olympic AI Agenda in 2024 providing strategic frameworks for this transformation. This paper examines how digital and AI technologies were applied at the 2024 Paris Olympics, the first Games guided by the exploration of impact on the Olympic movement and global sports landscape. Method: Using literature reviews and case studies from academic platforms like CNKI, WanFang, and Web of Science, this study analyzes digital transformation examples at the Paris 2024 Olympic Games. AI empowering the Olympics under the Agenda has been showcased to varying degrees at the Paris 2024 Olympic Games: 1) Precision—Modernizing Athlete Selection: AI aids talent identification, boosting accuracy and reducing resource waste, crucial for less developed countries. Intel, the 2024 Paris Olympics\u27 AI partner, piloted its 3DAT (3D Athlete Tracking) app in Senegal, assessing 1,000+ teenagers and selecting 48 for the National Olympic Committee\u27s program. 2) Innovation—Digitalizing Sports Training: Athletes are central to the Olympics. AI drives training digitization, improving on-site and off-site preparations. The US and Australian swim teams use AI motion capture to analyze movements and suggest improvements. China\u27s diving team employs an AI-assisted training system that interprets complex instructions, scores in real enhances technique mastery. 3) Efficiency—Standardizing Event Organization: Sports events are dynamic, requiring efficient coordination and precise judgments. This Olympics features AI-assisted officiating like the Judging Support System (JSS), computer vision, and VAR for fairer decisions in gymnastics, beach volleyball, and soccer. WADA\u27s AI-driven Athlete Biological Passport (ABP) improves doping detection, ensuring fairness. 4) Immersion—Personalizing the Viewing Experience: Digital tech enhances broadcasting, bringing the Olympics closer to viewers. Alibaba Cloud\u27s multi-angle replay, AI data analysis, and multilingual translation break language barriers, revealing deeper tactical insights. Google AI enriches user interaction with customized content, summaries, and augmented broadcasts. The Paris Olympics demonstrated digital technology\u27s significant impact on sports evolution. However, ethical and legal concerns arise due to the sports industry\u27s autonomy. To promote sustainable digital sports development, it is crucial for the IOC to maintain leadership in digital transformation, prioritize human-centered technology, and implement legislative regulations to balance progress with well-being
A025: Analysis of the Promotional Effects of Ethnic Traditional Sports Five Animal Exercise on Adolescents
No full textIt is the closing year of the National Fitness Plan (2021-2025) issued by the State Council. Schools are placing more emphasis on ethnic traditional sports, and the benefits of Five-Animal exercise on adolescents\u27 health are gradually being recognized. The aim of this study was to investigate the facilitating effects of Five Animal exercise on body composition, cardiorespiratory function, physical fitness, and the psychology of adolescents. This study was conducted on a sample of 50 healthy adolescents aged between 12 and 17 years old and them into an experimental group (N = 25) and a control group (N =25). The Five Animal Training Program was conducted twice a week for 12 weeks. The control group maintained their daily activities. Body composition (weight, BMI, and body fat percentage), cardiorespiratory fitness (SBP, DBP), RHR, RC, physical fitness (VO2max, sit-ups, vertical jumps, reaction time, and balance), depression, and self-esteem were measured before and after training. All results are expressed as mean and standard deviation and were verified using SPSS 12.0 for between-group comparisons in this study, followed by an analysis of variance (ANOVA) test by repeated measurements for the measurements of the dependent variable between groups. Before and after the 12-week Five Animal training, there was a significant difference in body fat percentage (F=3.586, p=0.067), body weight (F=4.438, p=0.042), and BMI (F=4.608, p=0.039). Cardiorespiratory fitness, SBP (F=1.046, p=0.313), DBP (F=0.067, p=0.788), and RHR (F=0.604, p=0.442) were not significantly different, but RC was significantly different (F=8.640, p=0.006). There were significant differences in all fitness variables; maximal oxygen uptake (F=4.921, p=0.033), sit-ups (F=22.822, p\u3c0.001), vertical jumps (F=18.381, p \u3c 0.001), reaction time (F=5.405, p=0.026) and balance (F=6.439, p=0.016). There was no significant difference in depression (F=0.037, p=0.848), but there was a significant difference in self-esteem (F=4.26, p=0.047). For adolescents between the ages of 12-17, Five Animal Training has little to no effect on psychological improvement, but has a significant positive impact on body composition, cardiorespiratory fitness, and physical performance. These results are an excellent physical workout presented by the Five Animal exercise. Through the results of this study, young children and adolescents can enhance their physical fitness. In addition, it is recognized as an excellent training method that applies the principle of comprehensiveness and can positively impact all areas of health-related and sport-related fitness
A091: Digital Era: Ideological Elements in \u27Intro to Sports\u27
No full textThe 20th National Congress of the Communist Party of China emphasized the importance of advancing educational digitization. In this context, ideological and political education in university sports courses faces both new opportunities and challenges. Introduction to Sports, a foundational course for sports majors, plays a critical role in helping students systematically understand the knowledge system of sports science. Integrating ideological and political elements into this course not only enriches its content but also aligns with the broader goal of fostering moral education. However, research in this area remains exploratory, with insufficient evaluation systems and a need for deeper theoretical and practical exploration. This study focuses on 172 students enrolled in the Introduction to Sports course at East China Normal University from September 2023 to January 2024. By identifying ideological and political elements within the course and evaluating their teaching effectiveness, the research aims to propose effective strategies for enhancing ideological education in sports courses, offering theoretical and practical insights for universities. Method: The study combines literature review, questionnaire surveys, and statistical analysis. A self-designed questionnaire was used to assess students\u27 perceptions of the ideological and political elements in the course. The analysis identified seven key dimensions of ideological and political elements in the course: system identity, patriotic sentiment, rule awareness, professional ideals, comprehensive abilities, sports spirit, and healthy living. Students showed a preference for innovative and dynamic teaching methods that incorporate current affairs. The evaluation revealed significant improvements in students\u27 understanding of sports spirit, patriotic sentiment, comprehensive abilities, and healthy living. However, their awareness of system identity, rule awareness, and professional ideals requires further development to achieve a well-rounded ideological and political education. The findings highlight the role of digital technology in diversifying the application of ideological and political education. Students generally support integrating ideological elements into course content and demonstrate a reasonable level of understanding. Moving forward, university instructors should adopt innovative teaching methods and diverse activities to enhance student engagement. This study provides valuable theoretical and practical insights for improving the Introduction to Sports course and optimizing teaching effectiveness
A027: Research on the Mechanism and Preventive Measures of Hamstring Muscle Injury in Football Players
No full textHamstring strain (HSI) is the most common non-contact injury in professional men\u27s football. Understanding the mechanism of hamstring injury in football players and taking effective preventive measures to reduce the probability of hamstring injury and protect their physical health is crucial. This article summarizes the injury mechanism of the hamstring muscle in football, discusses its risk factors, and summarizes preventive measures for hamstring muscle injuries, providing reference and guidance for future research on hamstring muscle injury prevention. Method: databases CNKI and Web of Science using keywords such as hamstring, football, and sports injuries. Summarize relevant literature to understand its research progress and provide development recommendations. Result: Research has found that the main cause of hamstring muscle injury may be muscle strain caused by centrifugal contraction. The main sites of injury are the semimembranosus, semitendinosus, long head of biceps femoris, and short head of biceps femoris. Possible risk factors that may cause injury include: 1. Primary risk factors: age, race, other body injuries, level of competition, and progress of a single game; 2. Recurrent risk factors: history of hamstring injury, degree of injury, and unreasonable rehabilitation methods; 3. Other risk factors: insufficient muscle strength, poor flexibility, insufficient pelvic muscle strength, improper training, insufficient warm-up, and fatigue. MRI can accurately evaluate the diagnosis and treatment of hamstring injuries, which is of great clinical significance. The prevention plan for hamstring injuries includes a primary and secondary prevention plan, involving the main training methods of stretching exercises, Nordic hamstring eccentric exercises, isokinetic training, isokinetic training, and endurance training. There is too little research on race, single game progression, and pelvic muscle strength among risk factors, and the results are uncertain. The research results on hamstring muscle strength are inconsistent and need further verification. The research conclusions on the effectiveness of NHE and isokinetic muscle training in preventing hamstring injuries in the prevention plan are relatively consistent, but there is a lack of strong data support for the intervention effect of NHE in multiple seasons. The research results of FWT in this study indicate that it may be an effective measure to prevent hamstring injury in football, but research in China is relatively shallow, and the research results may be influenced by race and literature sources
A064: Research on the Present Situation of Primary School Students\u27 Outdoor Sports Participation in Hebei Province
No full textIn recent years, the Chinese government has introduced a series of policy documents to encourage students to participate in sports activities. As an emerging form of sports, outdoor activities are particularly effective in promoting students\u27 healthy development and overall well-being. Against the backdrop of the Compulsory Education Curriculum Plan and Standards (2022 Edition), which includes outdoor activities such as wilderness survival and orienteering in the specialized sports skills curriculum, outdoor sports in primary and secondary schools are poised for accelerated development. In this context, investigating the participation of primary school students in outdoor activities, analyzing the specific factors influencing their involvement, and providing valuable support to advance the development of outdoor sports for primary school students have become critical issues that demand immediate attention and resolution. The study employed both literature review and questionnaire survey methods. The survey targeted 465 primary school students from 9 schools across 6 districts in Shijiazhuang, as well as primary school teachers. 1) Participation Rate in Outdoor Activities: 71% of primary school students have never participated in outdoor activities. Among those who have participated, the proportions of boys and girls are 35.2% and 26.6%, respectively. Parental participation in outdoor activities significantly influences their children\u27s participation. 2) Forms and Types of Outdoor Activities:62.1% of primary school students primarily participate in outdoor activities through family-organized events, 36.2% of students participate through outdoor clubs and travel agencies. The main activities include hiking (65%), mountain climbing (43%), and camping (39%). 3)Time and Frequency of Participation: Most students choose to participate in outdoor activities during holidays. Overall participation frequency is low, with 23% of students participating only once a month. 4) Satisfaction Levels: Most participants expressed satisfaction with feedback, hardware facilities, and soft services. Lower ratings were given to outdoor activity programs, logistical support, and the attitude of coaches. 5) Influencing Factors: The main factors influencing primary school students\u27 participation in outdoor activities, in order of importance, are student-related, external environment, family, school, and coach-related factors. Conclusion: To promote primary school students\u27 participation in outdoor activities, it is recommended to focus on the following aspects: strengthening interest cultivation, optimizing the external environment, fostering a positive family atmosphere for outdoor activities, improving the service quality of outdoor activity institutions, and enhancing school-enterprise collaboration to expand participation pathways. These measures will collectively contribute to increasing students\u27 engagement in outdoor sports
A168: Impact of Sports Participation on the Urban Integration of Migrant Children Under Social Identity Theory
No full textWith the acceleration of urbanization, many rural children move to cities with their parents as migrant children, but the urban-rural difference makes them face challenges in the integration process. As a wide range of social activities, sports have unique social and identity-building functions. Therefore, based on social identity theory, this study explores how sports can help migrant children integrate into the city. The theory emphasizes that individuals construct themselves and their sense of belonging through social classification, comparison, and positive differentiation. At the same time, the study analyzes the impact of sports participation on the social cognition of migrant children, reveals its positive role in enhancing urban identity, provides theoretical and practical guidance for the formulation of policies and the design of sports intervention programs, and helps migrant children better integrate into the city, achieve social harmony, and individual development. Literature method was used to construct the theoretical basis, logical analysis method was used to summarize and establish the logical framework, semi-structured interview method was used to collect experience, and qualitative analysis revealed the mechanism of sports participation on urban integration. The study found that sports participation was positively correlated with the urban integration of migrant children and could significantly promote their integration. Specifically: (1) enhance city identity and reduce loneliness and exclusion. (2) Promote the accumulation of social capital and expand social networks. (3) Enhance social adaptability, cultivate team spirit, and awareness of rules. However, from the perspective of social identity theory, it is further analyzed that sports participation promotes urban integration by enhancing social identity, and has the following internal mechanisms: (1) social classification: diminishing urban-rural differences and enhancing urban group identity; (2) social comparison: By comparing with urban peers, migrant children adjust their self-cognition and enhance their self-confidence and sense of self-worth. (3) Positive differentiation: successful experiences in sports, such as winning competitions, improve self-esteem and self-efficacy, and encourage them to think more positively about themselves and city life. Research shows that sports participation helps migrant children integrate into the city, accumulate social and human capital, and enhance their sense of identity. Families, schools, and communities should work together, with schools providing courses and competition opportunities, communities building facilities and organizing activities, and families encouraging interest. In the future, the influence mechanism and optimization strategy of sports activities can be further explored to enhance the inclusion effect