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A223: Does the Induced PAP Effect Have an Impact on the Squatting Start of Swimming
No full textPost activation potential (PAP) is one of the hot topics in warm-up preparation and physical training. This article explores the effect of inducing PAP on swimming start by using an 85% RM barbell squat in the lower limbs and investigates the impact of PAP 9 minutes after the squat start. Method: This article adopts an experimental method. The study selected 8 university swimming specialized student athletes and used the testing equipment Kistler to shoot videos and obtain data on their exercise biological force and time. The paired sample t-test was used to process the pre-test and post-test related data. After warming up and swimming in a squatting style pre-departure test, athletes perform 3 sets of 5 85% RM barbell squats and then rest for 9 minutes for a squatting style post-departure test. During the off stage, the average peak power of the horizontal force increased by 4 watts (T=-4.233, P=0.004), and the average peak power of the horizontal force increased by 0.072 times body weight (T=-3.408, P=0.011); The average increase in peak vertical force was 0.064 times body weight (T=-4.593, P=0.003); The peak force of the back kick increased by an average of 0.03 times body weight (T=-3.055, P=0.018), and after 9 minutes of testing, the average time from the back to 15 meters decreased by 0.016 seconds (T=4.258, P=0.004). The athletes showed significant differences (P \u3c 0.05) in the 9-minute posttest after inducing enhanced effects through 85% RM barbell squats compared to pretest squatting departure stage and segmented time data, indicating a positive impact. Whether the induced PAP effect has a positive impact on swimming departure has been confirmed through practice to be effective in the field of swimming departure. This effect has an enhancing effect on force and power, but whether it can be used in competitions and whether the induction method is reasonable needs further research
A030: Relationship Between Perceived Parental Expectations and Pre-Service PE Teachers\u27 Professional Identity: A Chain Mediation Model
No full textTeachers\u27 professional identity, defined as the complex of teachers\u27 self-concept based on experiences, beliefs, values, and motives towards their profession and internalized professional roles (Chen et al., 2023; Korthagen, 2004), is a central element of teachers’ career development and largely determines their professional commitment and performance (Day et al., 2005; Mahmoudi-Gahrouei et al., 2016). Studies have shown that external factors, such as educational policies, teacher support, and parental expectations, as well as internal factors like teaching motivation and academic self-efficacy, can predict pre-service teachers\u27 professional identity (Zhang & Zhao, 2016; Zhang et al., 2017; Whiston & Keller, 2004; Schepens et al., 2009). However, there is a lack of systematic research on the impact of perceived parental expectations on pre-service teachers\u27 professional identity and its mechanisms, especially for pre-service physical education (PE) teachers in China. This study aimed to explore the chain mediating relationship among perceived parental expectations, academic self-efficacy, motivation to teach, and professional identity of pre-service PE teachers in China. The findings of this study provide valuable insights for future research to design interventions to enhance professional identity, thus increasing professional commitment and teaching performance. Method: Participants were 401 undergraduate and graduate students majoring in PE from six Chinese normal universities. Questionnaires were administered online to measure perceived parental expectations, academic self-efficacy, teaching motivation, and professional identity, as well as demographic information. Internal consistency and Pearson correlation were conducted using SPSS 26.0. Structural equation modelling was conducted to test the conceptual model using Mplus8.3. There were significant correlations among perceived parental expectations, academic self-efficacy, motivation to teach, and professional identity (p \u3c .01). The model fit indices were CFI=0.954, TLI=0.945, and RMSEA=0.072. The mediating effect of academic self-efficacy on the perceived parental expectations and professional identity relationship was not significant (95% CI [-0.002, 0.046]), whilst the mediating role of motivation to teach on the perceived parental expectations and professional identity relationship was significant (95% CI [0.054, 0.224]). The chain mediating effect of academic self-efficacy and motivation to teach on the perceived parental expectations and professional identity relationship was found to be significant (95% CI [0.021, 0.099]). Perceived parental expectations could enhance pre-service PE teachers’ professional identity by increasing pre-service PE teachers’ academic self-efficacy and motivation to teach. The improvement of pre-service teacher education and training programs and the collaboration between families and educational institutions should be well considered to enhance pre-service PE teachers’ professional identity
A205: Immediate Effects of Electrical Stimulation and Motor Control Exercise in Recurrent Low Back Pain
No full textThis study examined the immediate effects of modulated medium-frequency electrical stimulation (MMFES) combined with motor control exercise (MCE) on lumbar multifidus (LM) activation, motor control, and pain alleviation in patients with recurrent low back pain (rLBP). This randomized controlled trial (RCT) enrolled 42 participants with rLBP, who were randomly allocated into three intervention groups: the MMFES group (15-minute MMFES), the MCE group (15-minute sham MMFES + 30-minute MCE), and the combined (COMB) group (15-minute MMFES + 30-minute MCE). Electrodes were placed bilaterally 3 cm lateral to L3/L5 spinous processes. The MCE protocol involved quadruped rocking backward exercises performed in sets of 15 repetitions, with 8–12 sets per session and 1-minute rest intervals between sets. Outcome measures, including LM activation, motor performance, and numerical pain rating scale (NPRS), were assessed at baseline and immediately post-intervention. LM activation was quantified via musculoskeletal ultrasound imaging by measuring muscle thickness at rest and during maximal voluntary isometric contraction (MVIC). These measurements were used to calculate the LM activation ratio using the formula： LMACT Rate（%）=(LMMVICLMREST)/ LMREST×100%. Motor performance was operationalized as knee flexion angle during the quadruped rocking backward, with larger angles indicating superior motor control. Intergroup comparisons were analyzed using independent samples t-tests or Kruskal-Wallis tests, while intragroup differences were evaluated via paired samples t-tests or Wilcoxon signed-rank tests. The COMB group exhibited superior outcomes versus the other groups in all measures (P \u3c 0.05), including higher LM activation ratios (vs. MMFES: d = 0.32; vs. MCE: d = 0.79). Post-intervention, the COMB group demonstrated a 61% increase in LM activation (from 13.87% to 22.25%, P \u3c 0.001), 8.5° improvement in motor performance (from 30.9°±3.1° to 39.4°±2.7°, P \u3c 0.01), and 3.2-point NPRS reduction (from 4.5±1.2 to 1.3±0.9, P \u3c 0.001). The MMFES group showed moderate LM activation gains (P \u3c 0.05) with pain relief and unchanged motor, while the MCE group improved motor performance with unchanged LM activation (P \u3e 0.05) and limited pain relief. The integration of MMFES with MCE demonstrated significant improvements in LM activation, motor performance, and pain symptoms in patients with rLBP. These findings support the application of MMFES as an adjunctive neuromodulatory intervention to address LM activation deficits in rLBP, potentially improving lumbar spine stability and reducing recurrence risk. Further research is warranted to validate the long-term therapeutic efficacy and elucidate the mechanistic basis of MMFES-induced neuromuscular adaptations
A060: Wearable-Based Entertaining Intervention Reduces Sedentary Time in Office Workers: A 12-Week Randomized Controlled Trial
No full textProlonged sedentary behavior in desk-based workers is a critical risk factor for metabolic syndrome, yet existing interventions often fail due to low engagement from delayed feedback and poor personalization. This study tested a novel wearable-gamification intervention combining real-time biosensing with personalized motivation strategies to reduce sedentary time and improve metabolic health in office workers. The aim was to evaluate its efficacy compared to standard reminders and assess its scalability under workplace settings. Method: A randomized controlled trial enrolled 95 adults (25–45 years) with sedentary jobs. Participants were divided into an intervention group (n=48) using a smart wristband linked to a gamified app and a control group (n=47) receiving standard reminders. The intervention integrated Social Cognitive Theory-based algorithms to dynamically adjust exercise goals (e.g., brisk walking/cycling ≥30 minutes daily) using MET values for activity quantification. Real-time haptic prompts, tiered rewards (including a ¥100 incentive for task completion), and personalized feedback were deployed. Sedentary time and physical activity were tracked via device data, while intrinsic motivation was measured using the BREQ-3 scale. Cost-effectiveness was analyzed per MET-hour improvement. The intervention group reduced daily sitting time by 72 minutes (95% CI: 64.5–79.8, p \u3c 0.001), significantly surpassing the control group’s 18-minute decline (p=0.32). Intrinsic motivation mediated 38% of behavioral change (β=0.41, p=0.007), with 83% of participants sustaining app usage post-intervention. The intervention demonstrated cost-effectiveness at ¥12.7 per patient for a 1 MET-hour improvement. Both groups showed no adverse effects, but the gamification cohort achieved clinically meaningful reductions in sedentary behavior. Embedding real-time biosensing into gamified frameworks effectively reduces sedentary time and promotes physical activity in office workers, aligning with WHO workplace health guidelines. The intervention’s success stems from personalized feedback, immediate rewards, and theory-driven design, which enhanced intrinsic motivation and long-term engagement. Its cost-effectiveness and scalability offer enterprises a practical tool to mitigate health risks. Future research should validate these findings across diverse workplaces and integrate environmental triggers to further optimize activity-promoting ecosystems. This study underscores the potential of hybrid digital solutions to address public health challenges
A044: Effect of Unilateral Compound Training on Lower Limb Explosive Power in Male College Sprinters
No full textTo investigate the effect of unilateral compound training on lower limb explosive strength in sprint athletes, with the aim of improving athletic performance. Participants were selected from sprint athletes at Beijing Sport University and randomly assigned to either the unilateral compound training group or the bilateral compound training group. The unilateral compound training group performed Bulgarian split squats, while the bilateral compound training group performed traditional barbell back squats. Both groups used 85% of their one-repetition maximum (1RM) as the training load, completing 4 sets of 5 repetitions with 6 minutes rest between sets and 3 minutes rest between repetitions, over a 6-week intervention period. Pre- and post-intervention measurements included countermovement jump (CMJ) height, rate of force development (RFD), peak power, 30-meter sprint time, and standing long jump performance. (1) The unilateral compound training group showed significant improvements in CMJ height, RFD, peak power, 30-meter sprint time, and standing long jump performance (P \u3c 0.01). (2) The bilateral compound training group also exhibited significant improvements in CMJ height, RFD, peak power, 30-meter sprint time, and standing long jump performance (P \u3c 0.01). (3) When comparing the two training groups, the unilateral compound training group demonstrated significantly greater improvements in CMJ’s RFD, 30-meter sprint time, and standing long jump performance (P \u3c 0.01), while no significant difference was found in CMJ height and peak power (P \u3e 0.05). Both unilateral and bilateral compound training can enhance explosive strength in sprint athletes. Unilateral compound training is more effective in improving RFD and sprint performance, while bilateral compound training has a greater effect on standing long jump performance
A269: Association Between Gross and Fine Motor: The Influence of Children\u27s Balance Ability on Visual-Motor Integration
No full textEarly motor development in children serves as a critical diagnostic indicator for normal growth and development. However, existing studies often isolate the development of gross motor skills from fine motor skills, lacking exploration into their interrelationships. Recent research has noticed the potential connection between balance ability and visual-motor integration (VMI) as a key breakthrough in understanding the association between gross and fine motor development. Nevertheless, prior work remains largely theoretical, with limited empirical validation. This study delves deeper into the underlying mechanisms of motor development by examining the relationship between writing movements and postural control, aiming to elucidate the influence of balance ability on visual-motor integration. A sample of 126 children aged 3–6 years from Chengdu, China, was assessed for visual-motor integration and static/dynamic balance abilities. Visual-motor integration was evaluated using the Beery VMI 6th Edition. Static balance was measured via single-leg stance and eyes-closed Romberg stance, while dynamic balance was assessed using the Y-balance test (YBT) and eyes-closed marching-in-place test. For static balance, open-eyed single-leg stance (r=0.56,p\u3c0.05) demonstrated stronger correlations with VMI than eyes-closed conditions(r=0.430, p\u3c0.05). For dynamic balance, A moderate positive correlation was observed with the VMI and YBT performance under Non-dominant foot support (r = 0.477, p \u3c 0.05), while only a weak correlation emerged under dominant foot support(r=0.354, p\u3c0.05). No significant correlation was found with eyes-closed marching-in-place performance. Regression models revealed that static balance positively predicted VMI (β = 0.385, p \u3c 0.001), visual precision (β = 0.293, p \u3c 0.05), and fine motor coordination (β = 0.267, p \u3c 0.05). Conversely, dynamic balance negatively predicted VMI (β = -0.919, p \u3c 0.05), visual precision (β = -0.595, p \u3c 0.05), and fine motor coordination (β = -0.627, p \u3c 0.05). Collectively, static balance positively influenced VMI, whereas dynamic balance exerted a negative predictive effect. Conclusions/Discussion: Both static and dynamic balance are closely associated with visual-motor integration, with static balance serving as a robust predictor of its development in preschool-aged children. Incorporating visual engagement tasks into balance training may synergistically enhance both balance and visual-motor integration. Gross and fine motor skills demonstrate a generally positive developmental interplay, though interactions between sub-domains (e.g., balance and manual coordination) may deviate from overall trends. Gross and fine motor development exhibit a coupling relationship characterized by both independent progression and functional synergy, though precise mechanisms require further investigation
A053: Research on Adolescent Obesity Experience
No full textThe alarming prevalence of overweight and obesity among adolescents has emerged as a significant public health challenge. Since the World Health Organization (WHO) identified obesity as a global health priority in 2018, it has evolved from an individual concern to a medical condition requiring intervention, with profound implications for both individuals and society. Adolescent obesity is intricately linked to various aspects of health, including social, emotional, behavioral, and cultural dimensions. There is a notable lack of qualitative research on obesity experiences in China. Conducting qualitative studies to explore the life experiences, motivations, and physical activity patterns of students can deepen our understanding of their true feelings and needs, while providing robust support for developing more effective obesity prevention and control strategies. This study employs two primary approaches. First, textual analysis was conducted to examine relevant literature on obesity experiences and body philosophy, including monographs, journals, academic reports, and speeches, establishing a theoretical foundation for the body philosophy of obesity experience and the thematic structure of adolescent obesity experience. Second, semi-structured in-depth interviews were conducted with 10 students, ensuring a balanced gender representation, to collect qualitative data. The relationship between obesity and health issues is not dichotomous but rather exists in a continuum between health and disease. Multiple factors, including family background, gender, and social norms, influence the development and subjective experience of adolescent obesity. This study examines the stigmatization experienced by adolescents and provides a theoretical framework for understanding the embodied experience of obesity. It offers an in-depth analysis of the lived experiences of young individuals, portraying their real-life situations and revealing their inner worlds. Qualitative research on the experience of obesity can challenge public stereotypes about adolescents and broader obese populations, thereby facilitating their better integration into society. By exploring how obese adolescents perceive and interact with the world, manage social relationships, and develop unique self-perceptions, this study enhances our understanding of their quality of life and current circumstances. Consequently, it proposes effective management strategies and psychological support measures. Additionally, this research enriches our understanding of obesity, critiques existing biases, and explores the distinct ways in which obese bodies perceive and respond to external stimuli, as well as the relationship between obesity and bodily experiences
A175: The Effects of a Four-Week Affective Priming Intervention on Exercise Behavior in Sedentary Undergraduates
No full textThe population remains physically inactive despite the proven benefits of physical activity. Promoting and maintaining sedentary undergraduates exercising is beneficial to their long-term development. According to the dual-process theory, behaviors are the result of not only reflective but also impulsive processes. Affective priming is assumed to be an efficient intervention to improve affective responses to exercise and might promote exercise behavior through the impulsive process. Therefore, the present study examined the effect of a four-week affective priming intervention on affective responses to exercise, exercise intentions, and exercise behavior. Method: Twenty-nine sedentary undergraduates (Mage = 20.07, SD = 2.05, female% = 89.7%) were randomized to either the exercise with subliminal affective priming group (AP group, n = 15) or the exercise only group (EX group, n = 14). Both groups were required to complete high-intensity treadmill running for 25 minutes per session, three times weekly for four weeks. The AP group performed subliminal affective priming tasks while running. Affective responses were measured during and after running. Following each session, participants were permitted to continue exercising in the gym, with subsequent exercise duration (minutes) recorded. Exercise intention and exercise behavior were measured at baseline, mid-intervention (2 weeks), and post-intervention (4 weeks). A linear mixed model (LMM) was conducted using JAMOVI. Findings supported the significant main effect of group for remembered pleasure (F(1, 27) = 4.79, p = 0.037), enjoyment (F(1, 27) = 5.37, p = 0.028) and exercise intention (F(1, 27) = 5.43, p = 0.028) after exercise, suggesting that AP group showed higher post-exercise affective responses and higher intentions to future exercise after the first time of intervention and this effects continued to the end of the intervention. Notably, the interaction of group and time on exercise (F(3, 81) = 3.05, p = 0.033) was significant, indicating that participants in the AP group were more tended to continue exercising in the gym after intervention. No other significant interactions were detected. The four-week subliminal affective priming intervention improves affective responses to exercise and promotes instant exercise behavior is acceptable. Results of the present study support designing more research to explore the efficacy of subliminal affective priming for promoting exercise in multiple samples and different types of exercise
A191: Hip Functional Training Efficacy on Athletic Performance and Postural Health in General College Students
No full textPrevailing sedentary behavior patterns and diminished physical activity engagement are yielding to health deterioration in collegiate populations. Recognizing physical education\u27s pivotal role in establishing sustainable exercise regimens and biomechanical competence, this investigation evaluates hip functional training (HFT) - an evidence-based intervention co-developed by sports scientists integrating progressive dynamic warm-ups, targeted neuromuscular activation, and functional movement patterns. Grounded in the hip joint\u27s biomechanical primacy within human kinematics, HFT aims to optimize motor control, mitigate injury incidence, and enhance athletic proficiency. This study systematically examines HFT\u27s efficacy in improving postural kinematics, spinal integrity, hip joint mobility, physical performance metrics, exercise compliance, and psychological outcomes within university physical education curricula. Sixty undergraduates (18-20 years) were randomly assigned to experimental (HFT intervention, n=30) or control (standard track-and-field training, n=30) groups. The intervention group completed an 8-week structured protocol comprising three biomechanically progressive phases: dynamic preparation, neuromuscular activation, and functional integration. Multidimensional assessments pre- and post-intervention encompassed: hip range of motion (SAB goniometric measurement), spinal alignment (Scoliosis Tester ST-101), dynamic postural control (Foncti-630 digital analyzer), movement competence (Functional Movement Screen), physical fitness parameters (National Standardized Test Battery), and psychological well-being indices. Statistical analyses were conducted using SPSS with supplemental data visualization through Excel. The HFT cohort demonstrated statistically superior outcomes relative to controls across multiple domains: spinal deviation reduction (p \u3c 0.01), pelvic tilt (52.48% decrease) and rotation (42.06% decrease), hip mobility improvement (Δ=9.3%, p\u3c0.01), movement competency enhancement (Δ=2.1 points, p \u3c 0.01), and national fitness test performance (p \u3c 0.01). Significant improvements were observed in exercise health literacy and postural self-monitoring behaviors (p \u3c 0.01). Baseline evaluation revealed prevalent musculoskeletal deficiencies, including spinal curvature anomalies and compromised hip functionality. The intervention significantly enhanced neuromuscular synchronization, hip joint kinetics, and spinal stabilization, substantiating HFT\u27s potential as an effective countermeasure against contemporary student health decline. Implementation strategies should emphasize curricular integration coupled with longitudinal evaluation frameworks. While findings derive from track-and-field contexts, subsequent multicenter trials should investigate HFT\u27s generalizability across diverse athletic modalities and non-specialized populations
A163: Assessing the Efficiency of Public Sports Services in Provinces: Based on DEA and FSQCA
No full textAs an important part of public service, public sports service governance is an important dimension of the modernization of national governance, and the improvement of its efficiency is related to the health of the whole people and social equity. The existing studies are weak in the application of indicators, lack the analysis of the complex interaction process of different antecedents, and lack empirical support for policy optimization. Method: This study adopts mixed Firstly, data envelopment analysis (DEA) is used to evaluate the dynamic total factor productivity of public sports services. Secondly, fuzzy set qualitative comparative analysis (fsQCA) is used to identify the differentiated driving paths of high/low efficiency caused by multi-factor allocation, such as economy, policy, culture, and social security. Most importantly, based on the R software, the dynamic change of inter-group configuration was analyzed, and the rule of inter-group configuration change was revealed. Result: The 7-year tfpch, effch, and tech index of 31 provinces were 1.125, 1.018, and 1.105, respectively, indicating the improvement of management efficiency. FSQCA results show that there are seven main configurations that can explain the differences in efficiency. Among them, there are 4, 2, and 1 configurations driven by guarantee factor , guarantee + information factor , guarantee + civilization degree , and their coverage is 0.546, 0.348, and 0.092, respectively. The security factors represented by income and environment occupy the most important position in the configuration combination, while the informatization factors and the degree of civilization are second. From the point of view of specific provinces, the higher level of public sports service in the more developed cities in the east is mainly explained by the configuration of security + civilization degree . The high level of public sports service in Western cities is mainly due to the national guarantee. Based on the above results, this paper draws the following conclusions: First, the guaranteed service provided by the state is the fundamental guarantee of efficient public sports service. Second, the reason for the higher development level of public sports services in more developed provinces may be that knowledge groups with a higher education level and better information use are gathered in cities. Third, for less developed provinces, efficient public sports services are mainly supported by the state, so it is necessary to further explore development in accordance with local conditions