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A082: Fatigue Effects on Lower Limb Biomechanics in Backhand Smash Landing: A Statistical Parametric Mapping Approach
No full textThis study applies one-dimensional statistical parametric mapping (SPM1d) to analyze the effects of exercise-induced fatigue on lower limb biomechanics during the landing phase of two high-risk backhand smash movements in female badminton players. It aims to reveal fatigue-induced changes in movement patterns and differences between the two actions, providing scientific insights for performance optimization, injury prevention, and training interventions. Thirteen female elite badminton players were recruited. A fatigue protocol based on a badminton-specific speed test was applied, and SPM1d was used to analyze kinematic and kinetic data before and after fatigue. After fatigue, significant increases were observed in hip coronal range of motion (ROM) (P = 0.024), knee valgus angle (P = 0.037), and trunk lateral tilt (P = 0.012), with significant decreases in hip abduction angle (P = 0.024) and trunk forward flexion (P = 0.048). When comparing the backward jump smash (BRJS) to the lateral jump smash (BLJS), significant differences were found in ankle (sagittal P = 0.006, horizontal P = 0.006) and hip (sagittal P \u3c 0.001, horizontal P \u3c 0.001) ROM, ankle external rotation angle (P = 0.047), knee flexion angle (P = 0.049), hip abduction angle (P = 0.002), trunk forward flexion angle (P = 0.042), ankle inversion torque (P = 0.048), internal rotation torque (P \u3c 0.001), knee inversion torque (P = 0.003), external rotation torque (P = 0.019), hip adduction torque (P = 0.003), and forward ground reaction force (GRF) (P = 0.05), all of which were significantly greater in BRJS. However, BRJS showed significantly smaller hip flexion angle (P = 0.014), hip extension torque (P = 0.019), hip internal rotation torque (P = 0.046), knee extension torque (P = 0.024), trunk lateral tilt (P = 0.004), lateral GRF (P \u3c 0.001), and vertical GRF (P = 0.003) compared to BLJS (1) The increase in knee valgus angle, trunk flexion angle, and lateral tilt angle, as well as the decrease in hip abduction angle caused by exercise-induced fatigue, increases the risk of ACL injuries in the lower limbs. (2) Both high-risk smash landings pose injury risks. In BRJS, increased ankle inversion/internal rotation torques heighten ankle sprain risk, while higher forward GRF and knee valgus torque raise ACL injury risk. In BLJS, greater medial GRF increases ankle sprain risk, whereas higher knee extension torque, trunk lateral tilt, and reduced knee/trunk flexion elevate ACL injury risk
A139: Evolution, Hot Spotlight, and Frontier Exploration of AI Applications in Physical Training: CiteSpace-Based Visualization Analysis
No full textThe rapid development of artificial intelligence (AI) technology has provided important support for the scientific, personalized, and intelligent physical training, and its application in the fields of sports performance optimization, injury prevention, and training program design has become the focus of sports science research. Method: In this study, we used the China Knowledge Network (CNKI) database as the data source, screened 428 core literatures in the intersection of artificial intelligence and physical training between 2000 and 2024, and analyzed the bibliometrics and knowledge mapping using CiteSpace software, to systematically reveal the knowledge structure, evolution path, and cutting-edge trends of AI-enabled physical training, with the aim of providing a new perspective for professional athletes\u27 physical training and health management. The results of the study show that the evolution path is divided into three phases, i.e., the technology germination period (2000-2010), the technology integration period (2011-2020), and the application deepening period (2021-present). Three major clusters are identified through the cluster analysis of research hotspots: 1. “Intelligent motion recognition and evaluation”, covering motion gesture capture, motion quality scoring, etc., with emergent terms such as “LSTM”, “3D motion analysis”; 2. “Data-driven training optimization”, which involves physiological indicator monitoring and load adaptive adjustment, with emergent terms such as ‘wearable devices’ and ‘reinforcement learning’; 3. “AI and Sports Injury Prevention”, focusing on injury risk prediction and rehabilitation program design, with keywords such as “biomechanical modeling”, “dynamic stability analysis”. His current research still has problems, such as insufficient technological depth and limited practical application scope. Future research should strengthen technological innovation, broaden the practical application scenarios, and promote a deeper and broader combination of physical training, in order to improve the quality and efficiency of physical training and help the development of sports
A007: A Study on the Movement Intensity Characteristics of Mobile Sports Games for Young Children
No full textThe intensity of physical activity among young children plays a critical role in determining the effectiveness of their physical exercise. This study employs the Delphi method to refine categories of sports games and developmental objectives tailored for young children. It identifies common mobile sports games that align with their developmental needs and examines the movement intensity characteristics of these games. The aim is to enhance children’s fundamental motor abilities and overall physical skill development. Method: In this study, experts in the field of early childhood were interviewed through the Delphi method to screen out mobile sports games that met the developmental needs of 5- to 6-year-old children. Sixty-six children (5.87±0.28 years old) were selected from a kindergarten class in Beijing. The screened mobile games were implemented in physical education, and 18 children were randomly selected to wear heart rate bands and 36 children to wear accelerometers in each class. Heart rate data and physical activity data were collected from the children using heart rate bands and accelerometers. A two-way ANOVA was conducted to explore the intensity characteristics of the games and potential differences based on gender and activity type. Following two rounds of Delphi screening, 6 categories of activities, 17 developmental objectives, and 52 commonly practiced movement-based physical games were identified. The average intensity of the mobility games was tested to be at the moderate to vigorous intensity level for older children. The objective indicators (mean count value and mean heart rate) were statistically different between ‘running’ and ‘walking’ and ‘balancing’ at different activity types of intensity (p \u3c 0.05), with ‘running’ being the most intense activity and ‘balancing’ the least. There was a significant difference (p \u3c 0.05) in the intensity between different genders. There was no significant difference between the different developmental goals for the same activity type (p \u3e 0.05). This study identified 6 types of activities17 [sic] developmental objectives, and 52 mobile sports games that address the developmental needs of 5- to 6-year-old children. This study provides some reference for the teaching of sports games in kindergarten. The overall level of intensity of children\u27s mobile sports games was moderate to vigorous, with ‘running’ being the most intense and ‘balancing’ the least intense. Boys’ activities were more intense than girls’, probably because boys were more motivated to participate in sports games
A153: Rehabilitation Research on Patellofemoral Pain Syndrome (PFPS) in Female Judo Athletes
No full textPatellofemoral pain syndrome (PFPS) is a prevalent knee disorder among athletes, known for its high incidence rate and propensity to progress into chronic conditions. Female athletes are more vulnerable due to inherent hip-knee muscle imbalances and aberrant movement patterns. Unfortunately, dedicated rehabilitation studies focusing on female judo athletes remain scarce. This research aims to alleviate PFPS symptoms by implementing core and functional training regimens and to analyze the significance of hip-knee muscle balance in the recovery process. Sixteen female judo athletes from the Henan Heavy Combat Sports Management Center, diagnosed with PFPS, were randomly into an experimental group (n=8) and a control group (n=8). The experimental group underwent a six-week training protocol including core stability exercises (e.g., transversus abdominis activation) and functional drills (e.g., hip bridges), with exercise intensity adjusted to individual capabilities. The control group received no intervention. Assessments included the Lysholm Knee Function Scale, IKDC subjective score, and hip-knee muscle strength measurements using Keiser equipment. Paired t-tests were used to analyze pre- and post-rehabilitation differences, with statistical significance set at P \u3c 0.05. In the experimental group, the Lysholm score increased significantly from 63.13 ± 5.14 to 83.75 ± 1.16 (P \u3c 0.01), and the IKDC score improved from 59.00 ± 8.32 to 75.13 ± 2.99 (P \u3c 0.01). Significant improvements were observed in affected-side hip abduction (73.25 → 83.87 lb), hip extension (27.00 → 37.62 lb), and knee flexion-extension strength (P \u3c 0.01). Post-rehabilitation, bilateral hip-knee muscle strength reached equilibrium (P \u3e 0.05). The control group showed only marginal improvement in the IKDC score (60.78 → 63.35, P \u3c 0.05). Core and functional training effectively improved knee function and alleviated pain in PFPS patients by correcting muscle imbalances. Strengthening hip abduction and extension muscles is critical, though insufficient focus on adductor muscles may hinder long-term recovery. Given the limited sample size and lack of long-term follow-up, future studies should expand participant numbers and observation periods. This research provides a tailored rehabilitation framework for judo athletes, emphasizing hip stability training
A160: Positive Health of Adolescents: A Digital Technology Perspective and the COM-B Model
No full textThe Outline of the Plan for the Construction of a Powerful Country in Education (2024-2035) clearly outlines the improvement of students \u27 physical health and emphasizes the innovation of the physical education mode by combining digital means. Based on the adaptability of the COM-B model (ability-opportunity-motivation dimension) and digital technology-enabled precision health management theory, the research aims to break the key bottleneck in the digital transformation of adolescent active health. Method: Using the triangle verification method: 1) collect academic resources from CNKI, WOS, and other platforms through literature and conduct a systematic review; Logical analysis method used to deconstruct the three-dimensional elements of the COM-B model: ability, opportunity, and motivation. 3) Delphi expert consultation and build a multi-party collaborative co-governance implementation path. The influencing factors of adolescent active health under the background of digital technology include: (1) Ability dimension: digital health literacy short board restricts adolescent active health management. (2) Opportunity dimension: the uneven distribution of technical resources leads to a gap in adolescents \u27 active health opportunities. (3) Motivation dimension: The lack of long-term health beliefs weakens adolescents \u27 active health drive. Based on the COM-B model, the collaborative co-governance path is proposed: (1) Ability consolidation: the government-school co-builds digital health literacy courses, and families participate in exercise feedback to improve adolescents \u27 digital health knowledge and application ability. (2) Opportunity extension dimension: government-led, regional resource adaptation, building a \u27 monitoring-feedback \u27 data interoperability closed-loop, and expanding access to digital health resources for adolescents. (3) Motivational synergy: Establish a \u27 goal-behavior-reward \u27dynamic incentive chain, reconstruct value identity, and enhance the internal motivation of adolescents \u27 active health. Active participation in sports activities is crucial to the improvement of adolescents \u27 physical health. Under the background of digital technology, based on the COM-B model, this paper explore the influencing factors and practical paths of adolescents \u27 active health, and establishe a \u27 government-enterprise-school \u27 digital health alliance through the collaborative path of ability strengthening, opportunity extension and motivation enhancement, to promote the development of adolescents \u27 active health behavior and provide support and reference for the development of adolescents \u27 physical education
A259: Kinematic Characteristics of a Novel Glide-Step and Rotational Delivery Technique in Shot Put
No full textThe shot put is a technically demanding track and field event requiring strength and coordination. This study introduces a novel technique combining the glide-step with rotational delivery, aiming to enhance throwing performance. While traditional glide and rotation techniques have been well-studied, the kinematic characteristics of this hybrid approach remain unexplored. This preliminary study analyzed the kinematic features of elite athletes using this technique via 2D video analysis. Three national-level shot put athletes were recruited. Each performed three throws using a standard shot in a regulated throwing circle, with the best attempt selected for analysis. 2D video analysis was conducted using Kinovea software, and non-parametric statistical tests were applied using SPSS Statistics 26.0. Key metrics included shot release velocity, joint angles, core of mass (COM) displacement, glide-step speed, and overall throwing performance. The analysis revealed key kinematic characteristics of the glide-step and rotational delivery technique. In the release phase, the average shot release velocity was 12.01 ± 0.38 m/s (peak: 13.25 ± 1.27 m/s), the average release height was 209.26 ± 10.83 cm, and the mean initiation-to-release time was 0.80 ± 0.04 s. Joint angles included the right knee ranging from 97.67 ± 4.51° to 146.67 ± 5.51°, right hip from 113.00 ± 19.08° to 147.00 ± 5.20°, thigh from 44.33 ± 19.66° to 104.67 ± 8.15°, and right arm from 68.33 ± 19.86° to 94.00 ± 6.00°. COM displacement ranged from 105.54 ± 22.09 cm to 152.09 ± 7.13 cm, with the support leg-trunk angle from 153.00 ± 6.08° to 172.33 ± 5.77° and right foot angle from 94.67 ± 1.15° to 134.00 ± 13.12°. Glide-step speeds ranged from 1.45 ± 0.16 m/s to 3.87 ± 0.07 m/s. This preliminary study explored the kinematic characteristics of a novel glide-step and rotational delivery technique in three elite shot putters using 2D video analysis. The findings suggest that this technique enables high release velocities and a rapid transition from glide-step to release, with glide-step speed and joint coordination potentially enhancing momentum. Variations in COM height and support leg-trunk angles indicate stability during the throw. Given the small sample size, these results are exploratory and require further validation with larger cohorts. Nonetheless, they offer initial insights into refining this technique for training purposes
A002: A Study on the Development of Beijing Winter Olympics Sport Participation Legacy in the Post-Games Era
No full textCurrently, many countries are experiencing a continuing decline in national sport participation, and national health problems are becoming increasingly serious. According to the ‘trickle-down’ effect, holding sports events can promote sports participation. The Beijing Winter Olympics have achieved the goal of driving 300 million people to participate in sports. However, after the past two years, the still 300 million people still participating in sports is unknown. Therefore, we investigated the sustainable development of the Beijing Winter Olympics sport participation legacy to examine the impact of sport events on sport participation. Method: A 15-minute semi-structured interview was conducted with staff members (n=37) from the 2022 Beijing Winter Olympic Organizing Committee (BOCOG) to explore the impact of the Games on sport participation and the post-Games development of the sport participation legacy from the event organizer’s perspective. These staff members served in different positions, including executive staff (n=26), department managers (n=6), and sport technical officials (n=5). Interviews were conducted online via Tencent Meeting, recorded, and converted to text data throughout. The analysis was conducted with a rigorous approach to ensure data validity and reflexivity, presenting participants\u27 perspectives in an objective and critical manner. It was found that: a) the Games brought awareness of sports to more people and increased people\u27s willingness to participate; bafter the Games, people\u27s enthusiasm for sports decreased, with one-time experience participation occupying the majority; c) ome policies were terminated after the Games, and there was a lack of post-Games policy support; d) post-Games utilization of Winter Olympic venues remain an issue, supporting facilities are still insufficient; e) he COVID-19 pandemic may have reduced the impact of the Games, resulting in a lack of post-Games. The Beijing Winter Olympics sport participation legacy has not been sustained in the post-Games period. Sports emerged late in China. The Games boosted people\u27s awareness, although many of the participants interviewed were positive on the development of sport participation legacy, expressing that the role model effect of sports stars can be used to help develop this legacy in the future, as well as the need for policy support, optimization of industrial services, and the establishment of an event series
A213: Somatosensory Interactive Technology on Postural Balance in Children with Developmental Coordination Disorder: A Systematic Review
No full textDevelopmental coordination disorder (DCD) is a neurodevelopmental disorder characterized by motor coordination impairments and motor learning difficulties. Compared with typically developing children, children with DCD often exhibit deficits in postural control, strength, and cardiorespiratory fitness. This study used a systematic review method to review the relevant evidence of video-game interventions in children with DCD, aiming to explore the mechanisms of somatosensory interaction technology on balance ability of children with DCD, and provide evidence-based recommendations for parents, teachers, and rehabilitation therapists. A PICO framework was constructed to systematically search Chinese and English literature on the intervention of video games on balance in children with DCD from CNKI, PubMed, Web of Science, EBSCO, Embase, and Cochrane Library. The search time was from the establishment of the database to November 14, 2024. The Physiotherapy Evidence Database (PEDro) scale was used to assess study quality, followed by data extraction and synthesis for the systematic review. Finally, 15 articles were included, with a total of 654 DCD and typically developing children, aged 5-16 years. The PEDro scale scores ranged from 3 to 8 points. Studies were from the Netherlands, Israel, South Africa, Brazil, Australia, and the United Kingdom, randomized controlled trials, 4 controlled trials, 1 quasi-experimental, and 1 single-group trial. The intervention used video games based on somatosensory interaction technology, mainly using Wii Fit, Xbox Kinect, and EyeToy devices, and the intervention contents included sports games such as archery, jumping, bowling, table tennis, football, Frisbee, skiing, and dancing. The intervention frequency was 15 times per week, 1060 minutes per session, for 14 weeks, and was conducted in school, home, and laboratory settings. The results show that video games based on somatosensory interaction technology have the characteristics of real-time interaction and timely reinforcement feedback, improve the physical function and activity participation of children with DCD, and have a significant effect on the improvement of postural balance. However, this study has limitations, including significant heterogeneity in experimental designs, sample characteristics, and intervention protocols across the included studies, as well as the omission of relevant outcome indicators such as psychological outcomes. Future research should prioritize high-quality randomized controlled trials to evaluate the effectiveness of video-game interventions on both physical and psychological health outcomes in children with DCD
A098: Artificial Intelligence Empowers Exercise and Health for the Elderly: Opportunities, Challenges, and Pathways for Implementation
No full textIn the context of accelerated global aging and rapid development of artificial intelligence (AI) technology, AI technology provides a new paradigm for improving sports and health management services in the field of elderly care and quality of life. This study aims to reveal the core value of AI technology, analyze the current practical challenges of AI empowerment, and build multidimensional pathways for implementation to promote the coordinated development of healthy aging and technological innovation. Through literature analysis, case studies, and expert interviews, this study systematically explores the application of AI technology in the field of exercise and health of the elderly. First, from a technological perspective, the study analyzes the application potential of AI in elderly exercise monitoring, health data analysis, personalized health interventions, and virtual fitness scenarios, facilitating precise health management for the elderly. Second, from the societal perspective, the study examines how policy support and the demands of the silver economy jointly drive the industrial integration of the “AI + sports and health”. Third, the study identifies challenges such as inadequate age-friendly technology adaptation, data privacy risks, the digital literacy gap, and high service costs, which limit the inclusiveness of AI applications. Fourth, to overcome these challenges, a four-dimensional approach is proposed: iteration (Developing low-threshold interactive Systems), Policy support (Improving data security regulations), Service optimization (Establishing a “community-home-institution” collaborative model), and Humanistic care (Promoting digital literacy training for the elderly. These measures aim to achieve the deep integration of AI for social good and healthy aging. The intervention of AI technology in the field of exercise and health of the elderly requires systematic analysis and overall planning. Through the balance of technology and application, the guarantee of policies and systems, the promotion of social education and cultural adaptation, the effectiveness of AI technology in the field of exercise and health of the elderly is enhanced, which helps to provide references in theory and practice and promote the realization of the goal of healthy aging
A159: Research on Quality Monitoring Strategies for Physical Education and Health Curriculum Implementation in Compulsory Education
No full textSince the promulgation of the “Compulsory Education Curriculum Experimental Program” in 2001, China’s compulsory education curriculum standards have undergone two rounds of revisions in 2011 and 2022, continuously promoting the quality of basic education. To deepen the curriculum reform, the Ministry of Education proposed to “improve the curriculum implementation monitoring system.” The purpose of this study is to explore the systematic path of quality monitoring of the implementation effect of physical education and health curriculum in the compulsory education stage and to provide a theoretical basis for the high-quality development of the curriculum. Method: The research mainly uses the literature data method, expert interview method, and logical analysis method to analyze the significance, value, principles, and strategies of the quality monitoring of the implementation effect of physical education and health courses in the compulsory education stage. (1) Clarify the main functions of monitoring. Establish a three-level coordination mechanism of “education administrative department coordination-teaching and research institution support-school main body implementation.” (2) Construct the theoretical framework of monitoring. Based on the CIPP evaluation theory, a monitoring framework of “background (curriculum plan, curriculum system, etc.)-input (teacher level, curriculum resources, etc.)-process (teacher teaching behavior, student learning style, etc.)-result (student core literacy, physical health data, etc.)” is established. (3) Innovate the monitoring implementation path. By using the methods of field observation and file analysis, combined with traditional tools (such as scales) and intelligent devices (such as heart rate bracelets), a monitoring procedure of “baseline diagnosis-dynamic tracking-value-added evaluation” was established. (4) Optimize the application of monitoring results. Provide monitoring reports to educational decision-makers, school administrators, and teachers at different levels, and strengthen the connection between monitoring results and curriculum decision-making, training, teaching, and research, and teaching improvement. (5) Improve the monitoring and security system. Improve policy support, funding, and expert team building to ensure the standardization, continuity, and effectiveness of monitoring work. Clarifying the promotion strategy of the quality monitoring of the implementation effect of physical education and health curriculum in the compulsory education stage is helpful to objectively evaluate the effectiveness of curriculum education, promote the achievement of the goal of “sports people,” and provide a reference for the monitoring of curriculum implementation