A018: Impact of Unanticipated and Backhand Area Smash Landing on Female Badminton Players’ Lower Limb Biomechanics

In badminton, lower limb injuries frequently occur during unanticipated smash landing movements. Additionally, the risk of lower limb injuries may vary depending on different landing strategies. This study aims to investigate the impact of unanticipated factors and two types of smash actions in the backhand area on lower limb biomechanics. Method: A motion capture system (Motion Analysis Raptor-4, USA) and Kistler force plates (model 9287B, 90 cm × 60 cm × 10 cm, Kistler Instruments AGCorp., Switzerland) were used to collect biomechanic data of 13 female athletes during backhand rear-court jump smash (BRJS) and backhand lateral jump smash (BLJS) in both anticipated and unanticipated conditions. Statistical analyses were performed using SPSS 17.0 (SPSS Inc., Chicago, IL, United States). A 2 × 2 repeated measures ANOVA (jump smash movement × expected condition) was used to analyze the effects of the jump smash movement and expected conditions on lower limb biomechanics. When the main effects were significant, post-hoc comparisons were conducted using paired t-tests with Bonferroni correction. Open-source software package spm1d (http://spm1d.org) in MATLAB R2019a (The MathWorks, Natick, MA, USA) was used for analysis. The results indicated that BRJS and BLJS resulted in higher vertical instantaneous load rates (p= 0.003, =0.314) and knee extension moments (p= 0.013, =0.231) at initial contact (IC) under unanticipated conditions. The main effect results indicated that BRJS had greater knee abduction angles (p= 0.03, = 0.182) and knee adduction moments (p= 0.01, =0.248) at IC than BLJS, while the interaction effects showed that BRJS had a greater frontal plane center of pressure displacement under unanticipated conditions (p= 0.041, = 0.186). BLJS showed greater knee extension moments (p= 0.013, =0.231) and smaller knee (p= 0.002, = 0.347) and hip (p \u3c 0.001, = 0.491) flexion angles at IC compared to BRJS. Additionally, BLJS demonstrated higher peak ankle internal rotation moments (p= 0.018, =0.212) than BRJS, with a greater peak ankle inversion moment under unanticipated conditions. Conclusions/Discussion: Unanticipated factors significantly impacted the biomechanics of both smash landing actions, potentially increasing the risk of ACL injuries. Moreover, nanticipated factors may increase the risk of ankle sprains during the BLJS movement

A132: Digital Health Services to Promote Healthy Aging: The Logical Way, Blocking Barriers and Breakthrough Paths

With the aging of the population in our country, healthy aging becomes an important strategic objective to improve the quality of life. Digital health services, as an emerging model, use the Internet, big data, artificial intelligence, and other technical means to provide innovative solutions for the health management of the elderly. However, older people have special characteristics in terms of digital skills and health service needs, which lead to many challenges for digital health services in promoting healthy aging. In recent years, the state has issued a series of policies to promote the development of healthy aging, such as the 14th Five-Year Plan for Healthy Aging and Opinions on Promoting the construction of Basic Elderly Care Service System , which have provided policy support for the development of digital health servicesexposed problems such as weak infrastructure, supply-demand imbalance, and digital divide. This study adopts literature, logical analysis, expert interviews, and other research methods to the logical path of digital health services to promote healthy aging, analyze the barriers it faces, and propose a corresponding breakthrough path. The study found that the logical path of digital health services to promote healthy aging includes implementing policy requirements, meeting the increasing demand for elderly health services, empowering the elderly health service system, and innovating management models. However, its development faces challenges such as weak infrastructure, insufficient matching of supply and demand, deepening digital divide, coordination of multiple entities, and lack of institutional norms. Digital health services have great potential to promote healthy aging, but they also face many challenges. Measures such as strengthening infrastructure construction, optimizing supply and demand matching, narrowing the digital divide, establishing collaborative mechanisms, and improving institutional norms can effectively improve the quality and accessibility of digital health services for the elderly and promote the development of healthy aging. From the perspective of theory and practice innovation, this study provides theoretical reference and practical reference for China\u27s digital health services to promote healthy aging

A222: Transformational Leadership and Tacit Knowledge Transfer in Sports Events

The successful staging of international sports events in China heavily relies on the contributions of numerous short-term paid professionals across various functional departments. However, research on knowledge transfer among these professionals within organizing committees remains scarce. This study aims to address this research gap. Grounded in Social Exchange Theory, it investigates how transformational leadership within organizing committees promotes team trust, thereby fully exploiting and applying the tacit knowledge of these professionals to achieve effective knowledge retention and transfer. Method: This study employs semi-structured interviews to collect data from 20 professionals who have participated in continental or global sport events. NVivo software was used for data coding and theme extraction. Result: The results reveal that leaders\u27 professional competence, benevolence, and organizational procedural justice, as well as professionals\u27 trust propensity, play a crucial role in facilitating knowledge sharing and transfer. Organizing committees should select managers with extensive event management experience, fulfill reward commitments in accordance with the contractual spirit, and provide further career development platforms and opportunities for professionals. This study offers theoretical and practical insights for the operation of international sports events

A285: Effects of Aerobic Exercise on Young Women with Binge Eating Disorder: A Randomized Controlled Trial

Binge eating disorder (BED) is one of the most common eating disorders. It is more common in young women than in other groups and can lead to adverse physical and psychological problems. Previous studies have revealed that aerobic exercise is effective in reducing overeating, but it is not clear which exercise intensity works best. This study, therefore, compared the effects of high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) on body composition and mental state of young women with BED. 30 BED young women (Mage = 20.07 years, SD = 0.20) who didn\u27t regularly participate in physical activity were selected from a Chinese university and randomly divided into 2 groups: the HIIT group (H, n=15) and the MICT group (M, n=15). Both interventions were performed twice a week for 8 weeks with the same exercise volume. During the experiment, heart rate and ratings of perceived exertion (RPE) of subjects were monitored, and the exercise volume increased gradually. Specific exercises were as follows: (1) H: treadmill exercise, 60-89% (heart rate reserve, HHR) for 4 min alternating 40-59% HHR for 3 min, and (2) M: treadmill exercise, 40-59% HHR. Binge eating scale (BES) scores, number of binges in the last week (NBLW), and the depression, anxiety, and stress scales-21 (DASS-21) scores were collected by validated questionnaires; Body mass index (BMI) and percentage of body fat (PBF) were measured by DXA before and after the experiment. Independent t-tests, Mann-Whitney U tests, two-way repeated measures ANOVA, and post-hoc tests were used in data analysis. (1) Before the intervention, there were no significant differences in age, weight, BES, NBLW, DASS-21, BMI, or PBF between the 2 groups. (2) After the experiment, all 5 clinical parameters mentioned above decreased significantly (p＜0.01) in both groups. (3) Compared to H, the BMI (1.14±0.56 vs 0.52±0.45, p＜0.05) and PBF (1.63±0.61 vs 0.96±0.58, p＜0.05) were reduced more significantly in M after the intervention. In accordance with previous findings, this study supported that aerobic exercise could treat, suggesting that both MICT and HIIT for 8 weeks could improve the body composition and mental state of BED young women, with MICT having a more significant impact on body composition. This study provided a scientific basis for making exercise prescriptions for BED patients. But more of different ages and genders, and clinical parameters should be included in future research

A217: The Empirical Study on the Influence of After-School Football Training on School Students\u27 Social Integration

This study aims to demonstrate the importance of after-school football training in the socialization and integration process of primary school students. Method: Fifty primary school students were randomly assigned to an experimental group and a control group. The experimental group underwent a systematic and planned 9-week after-school football training intervention, while the control group continued with their normal school activities and did not participate in regular physical exercise during the same period. The sociometric method was employed, with pre-test and post-test questionnaires completed to compile interpersonal relationship matrices, indices related to personal status, and interpersonal relationship analysis charts for both groups. Results: Analysis of the group relationships within the experimental and control groups revealed that the two groups had the same level of cohesion pre-test. Post-test, the cohesion index of the experimental group increased, transforming from a weakly cohesive group to a strongly cohesive group. In contrast, the cohesion index of the control group remained unchanged, staying as a weakly cohesive group. There was a significant difference in the cohesion index between pre-test and post-test within the experimental group (p \u3c 0.05), and a significant difference was also observed between the experimental and control groups post-test (p \u3c 0.05). The research findings indicate that after-school football training has a positive impact on the socialization and integration process of primary school students

A090: Development and Efficacy Evaluation of Virtual Reality (VR)-Based Personalized Exercise Prescriptions for Perimenopausal Women

Perimenopausal women (aged 45–54) frequently experience climacteric symptoms such as vasomotor disturbances, osteoporosis, and cardiovascular risks due to declining ovarian function and estrogen levels. Approximately 75% of women report varying degrees of discomfort, with 80% exhibiting at least one symptom (e.g., sleep disorders, mood fluctuations). Conventional exercise prescriptions often lack specificity to address individual health disparities and comorbidities (e.g., osteoporosis, metabolic dysfunction). This study aimed to develop a virtual reality (VR)-based personalized exercise prescription system to enhance exercise adherence through immersive experiences and evaluate its efficacy in alleviating perimenopausal physiological and psychological symptoms. A personalized exercise prescription generation system was developed by integrating health assessments (body composition, cardiopulmonary function, bone mineral density) with VR technology. The system dynamically adjusted exercise regimens (e.g., moderate-intensity aerobic and resistance training) based on biosensor data (heart rate, exercise intensity) and user preferences. A total of 120 perimenopausal women were randomly assigned to either a VR intervention group (VR-guided personalized exercise) or a control group (conventional exercise guidance) for a 12-week intervention. Outcome measures included physiological indices (estradiol levels, bone mineral density, heart rate variability [HRV]), psychological scales (anxiety/depression scores), and exercise adherence, quantified via accelerometry and clinical tests. The VR group demonstrated significantly greater improvements in vasomotor symptom frequency (42% reduction vs. 28%, p \u3c 0.05), sleep quality (35% decrease in Pittsburgh Sleep Quality Index scores), and balance capacity (22% increase in Berg Balance Scale scores) compared to the control group. Superior outcomes were also observed in bone mineral density (femoral neck T-score: +0.8% vs. +0.3%) and HRV parameters (18% increase in RMSSD). Psychologically, anxiety scores decreased by 40% in the VR group, with adherence rates reaching 85% (vs. 62% in controls). Biomechanical analysis revealed that VR-enhanced real-time feedback improved movement precision and reduced joint stress during exercise. VR technology effectively improves exercise engagement and mitigates perimenopausal symptoms through personalized, gamified interventions. Its strengths lie in dynamic adaptation to individual health profiles (e.g., osteoporosis risk) and multimodal feedback to ensure exercise safety. Future studies should expand sample sizes to validate long-term efficacy and explore deeper integration of VR with wearable devices for real-time health monitoring and prescription optimization. This study provides an innovative approach to perimenopausal health management, highlighting the potential of immersive technologies in addressing sex-specific health challenges

A300: The Relationship Between Sports Morality and Executive Function in Secondary School Students: An Intervention Study

In the context of globalization, there is an increasing emphasis on the development of core competencies. Many countries have adopted core competencies as key curriculum goals and evaluation criteria. In China, the Physical Education and Health curriculum follows this trend, incorporating core competencies such as motor skills, healthy behaviors, and sports morality. Among them, sports morality is a crucial component, playing an essential role in fostering students’ moral development through physical activity. Research in psychology and education suggests a potential link between sports morality and executive function. As a complex, high-level cognitive process, executive function significantly impacts students\u27 problem-solving abilities and other cognitive skills. This study aims to investigate the relationship between sports morality and executive function in Chinese junior high school students, to alleviate the tension between academic and physical education curricula and enhance the educational value of physical education. A total of 20 seventh-grade students were randomly selected and divided into an experimental group and a control group. A 12-week (18-session) teaching intervention was implemented. The experimental group received football-based physical education, while the control group followed a traditional PE curriculum. Pre- and post-intervention assessments included a sports morality questionnaire and executive function tests for all participants. Paired sample t-tests were used to evaluate changes in sports morality before and after the intervention, while ANCOVA was employed to compare the effects of different teaching approaches on students’ sports morality. Changes in executive function were analyzed using paired t-tests and ANCOVA, and Pearson correlation analysis was conducted to examine the relationship between executive function and sports morality. P significantly improved students’ sports morality and executive function. Sports character, a dimension of sports morality, was negatively correlated with cognitive flexibility (p \u3c 0.05), while sportsmanship was negatively correlated with updating function (p \u3c 0.05). Conclusion: P can effectively enhance students’ levels of sports morality and executive function. Junior high school students with higher levels of sports morality tend to show better cognitive flexibility and updating abilities. Therefore, school PE programs should place greater emphasis on cultivating students’ sports morality, leveraging the moral education function to promote holistic student development

A071: Multidimensional Impact of Picturebooks on Preschoolers\u27 Physical Literacy via Educational Intervention

To explore the role of picturebooks as educational interventions in promoting the development of physical literacy in preschoolers aged 3-6 years old, and to analyze effectiveness in enhancing children\u27s body perception, fundamental movement skills and awareness of healthy behaviors through content design, interactive reading and activity extension, in order to provide a theoretical basis for the practice of physical literacy in early education. Method: Using a randomized controlled experimental design, 256 preschoolers were selected and divided into an experimental group (n=128) and a control group (n=128). The experimental group conducted dynamic reading activities (e.g., movement imitation, situational play, and role-playing) based on the Movement Stories Series and Health Theme Picturebooks for 30 minutes, three times a week, while the control group conducted regular reading sessions. Physical literacy levels were assessed after the intervention using the Physical Literacy in Children Questionnaire (PL-C Quest), and inter- and intra-group differences were analyzed by independent and paired samples t-tests. (1) Before the experiment, there was no significant difference between the physical literacy levels of the children in both groups (p \u3e 0.05); (2) After the experiment, the experimental group had a highly significant difference between the physical and cognitive domains (p \u3c 0.01), and the psychological and social domains (p \u3c 0.05); the children in the control group had a significant difference only in the cognitive domain (p \u3c 0.05), and there was no significant difference in the domains (p \u3e 0.05). Picture books can effectively stimulate preschoolers\u27 interest in participating in physical activities and promote overall development of physical literacy through visualization scenes, character demonstrations, and dynamic interactive practices. It is recommended that picture books and physical activities be integrated into a structured educational program, that families and kindergartens work together to create a dynamic reading environment, and that the creation of picture books be guided to incorporate the themes of sports science and health in order to support children\u27s physical literacy development

A153: Rehabilitation Research on Patellofemoral Pain Syndrome (PFPS) in Female Judo Athletes

Patellofemoral 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

A068: Research Progress on the Mechanisms of Exercise Preconditioning in Promoting Neurological Repair After Stroke

Stroke 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