26242 research outputs found
Sort by
A040: Exercise Modulates Dilp6 via Foxo to Ameliorate HFD-Induced Lipotoxic Cardiomyopathy in Drosophila
No full textA High-fat diet (HFD) has been shown to cause myocardial lipotoxicity and thus cardiac dysfunction in Drosophila, but the underlying mechanisms and intervention strategies are unclear. Insulin-like growth factor 1 (IGF-1) (Drosophila Dilp6 homologue) plays an important role in adipocyte differentiation, insulin sensitivity. Exercise can improve lipid metabolism disorders, cardiac hypertrophy, and myocardial fibrosis, and effectively prevent lipotoxic cardiomyopathy. Studies have shown that the insulin-regulated transcription factor Foxo positively regulates the expression of Dilp6 in Drosophila adipose bodies. Therefore, the aim of this study was to investigate whether exercise regulates the expression of Dilp6 through the transcription factor Foxo to alleviate HFD-induced lipotoxic cardiomyopathy in Drosophila. Method: W1118 wild-type Drosophila, as well as the UAS-Gal4 system, were used to construct Foxo, Dilp6 knockdown lines of Drosophila. Virgin flies feathered within 12 hours were collected for the following groupings: W1118 high-fat diet and high-fat diet exercise group; Fat-specific Dilp6 knockdown group; fat-specific Foxo knockdown exercise group. RT-qPCR assay, Drosophila cardiac function, and ghost pen cyclic peptide assay were performed. Compared with the normal group, Drosophila cardiac pumping capacity was reduced in the high-fat diet group, and the expression of Foxo and Dilp6 was decreased, and the staining results of ghost pen cyclic peptide showed that the structure of cardiomyocytes was damaged. In contrast, the high-fat exercise group showed significant improvement. 2, the fat-specific Dilp6 knockdown group showed the same phenotype as the high-fat diet group. 3. Compared with the normal exercise group, the expression of Dilp6 in the Foxo knockdown exercise group did not increase significantly. Therefore, the results showed that Foxo regulated the expression of Dilp6, and exercise increased the expression of Dilp6 by upregulating Foxo, thereby improving the cardiomyopathy caused by a high-fat diet and improving the exercise capacity of Drosophila. Exercise ameliorates HFD-induced cardiac dysfunction in Drosophila by upregulating Dilp6 expression through activation of the transcription factor Foxo
A010: Effects of Blood Flow Restriction Interval Training on Aerobic, Anaerobic, and Muscle Strength: A Meta-Analysis
No full textImplementing blood flow restriction (BFR) during exercise is becoming an increasingly useful adjunct in exercise and rehabilitation settings. Studies have shown that the advantages of combining BFR with training can be observed in two scenarios: (1) lower absolute intensity training (such as walking) induces adaptations similar to high-intensity training (such as interval running); (2) higher physiological stimuli can be achieved during moderate-to-high-intensity exercise, leading to greater improvements in aerobic, anaerobic, and muscular parameters. The former has been well documented in previous studies, but there is a lack of consensus regarding the combination of BFR (during or after exercise) with interval training (IT) protocols. Therefore, this study evaluates the effects of BFR + IT on aerobic, anaerobic, and muscular strength. Method: The search was conducted in August 2024 across six databases. Studies with randomized controlled designs that investigated maximal oxygen uptake (VO2max), peak power output (PPO), mean power output (MPO), and muscular strength parameters were selected. Data (mean ± standard deviation and sample size) were extracted from the included studies and converted into the standardized mean difference (SMD). Random-effects meta-analyses were performed. Subgroup analyses were used to examine potential sources of heterogeneity due to intensity, training status, cuff pressure, and cuff application phase. Seventeen publications (15 studies) consisting of 387 participants were included. The pooled effect size of BFR + IT on VO2max (SMDpooled=0.46, 95% CI 0.15 to 0.76, p=0.003, I²=33.7%, p=0.105) was moderatesignificantwith [sic] low heterogeneity. The pooled effect size of BFR + IT on peak power output (SMDpooled=-0.08, 95% CI -0.56 to 0.40, p=0.739, I²=20.7%, p=0.283) was small and not significant. The pooled effect size of BFR + IT on mean power output (SMDpooled=0.26, 95% CI -0.19 to 0.71, p=0.255, I²=0.0%, p=0.759) was small and not significant. The pooled effect size of BFR + IT on muscular strength (SMDpooled=0.57, 95% CI 0.26 to 0.88, p \u3c 0.001, I²=42.5%, p=0.042) was moderately significant with moderate heterogeneity. Subgroup analyses revealed that the effects of BFR + IT on aerobic capacity, anaerobic capacity, and muscular strength were significantly influenced by intensity (high intensity vs. moderate to low intensity) and training status (trained vs. untrained). To systematically assess the evidence regarding the effects of BFR + IT on enhancing aerobic capacity and muscular strength, but not on improving anaerobic capacity. Implementing blood flow restriction (BFR) during exercise is becoming an increasingly useful adjunct in exercise and rehabilitation settings. Studies have shown that the advantages of combining BFR with training can be observed in two scenarios: (1) lower absolute intensity training (such as walking) induces adaptations similar to high-intensity training (such as interval running); (2) higher physiological stimuli can be achieved during moderate-to-high-intensity exercise, leading to greater improvements in aerobic, anaerobic, and muscular parameters. The former has been well documented in previous studies, but there is a lack of consensus regarding the combination of BFR (during or after exercise) with interval training (IT) protocols. Therefore, this study evaluates the effects of BFR + IT on aerobic, anaerobic, and muscular strength. Method: The search was conducted in August 2024 across six databases. Studies with randomized controlled designs that investigated maximal oxygen uptake (VO2max), peak power output (PPO), mean power output (MPO), and muscular strength parameters were selected. Data (mean ± standard deviation and sample size) were extracted from the included studies and converted into the standardized mean difference (SMD). Random-effects meta-analyses were performed. Subgroup analyses were used to examine potential sources of heterogeneity due to intensity, training status, cuff pressure, and cuff application phase. Seventeen publications (15 studies) consisting of 387 participants were included. The pooled effect size of BFR + IT on VO2max (SMDpooled=0.46, 95% CI 0.15 to 0.76, p=0.003, I²=33.7%, p=0.105) was moderatesignificantwith [sic] low heterogeneity. The pooled effect size of BFR + IT on peak power output (SMDpooled=-0.08, 95% CI -0.56 to 0.40, p=0.739, I²=20.7%, p=0.283) was small and not significant. The pooled effect size of BFR + IT on mean power output (SMDpooled=0.26, 95% CI -0.19 to 0.71, p=0.255, I²=0.0%, p=0.759) was small and not significant. The pooled effect size of BFR + IT on muscular strength (SMDpooled=0.57, 95% CI 0.26 to 0.88, p \u3c 0.001, I²=42.5%, p=0.042) was moderately significant with moderate heterogeneity. Subgroup analyses revealed that the effects of BFR + IT on aerobic capacity, anaerobic capacity, and muscular strength were significantly influenced by intensity (high intensity vs. moderate to low intensity) and training status (trained vs. untrained). To systematically assess the evidence regarding the effects of BFR + IT on enhancing aerobic capacity and muscular strength, but not on improving anaerobic capacity. Implementing blood flow restriction (BFR) during exercise is becoming an increasingly useful adjunct in exercise and rehabilitation settings. Studies have shown that the advantages of combining BFR with training can be observed in two scenarios: (1) lower absolute intensity training (such as walking) induces adaptations similar to high-intensity training (such as interval running); (2) higher physiological stimuli can be achieved during moderate-to-high-intensity exercise, leading to greater improvements in aerobic, anaerobic, and muscular parameters. The former has been well documented in previous studies, but there is a lack of consensus regarding the combination of BFR (during or after exercise) with interval training (IT) protocols. Therefore, this study evaluates the effects of BFR + IT on aerobic, anaerobic, and muscular strength. Method: The search was conducted in August 2024 across six databases. Studies with randomized controlled designs that investigated maximal oxygen uptake (VO2max), peak power output (PPO), mean power output (MPO), and muscular strength parameters were selected. Data (mean ± standard deviation and sample size) were extracted from the included studies and converted into the standardized mean difference (SMD). Random-effects meta-analyses were performed. Subgroup analyses were used to examine potential sources of heterogeneity due to intensity, training status, cuff pressure, and cuff application phase. Seventeen publications (15 studies) consisting of 387 participants were included. The pooled effect size of BFR + IT on VO2max (SMDpooled=0.46, 95% CI 0.15 to 0.76, p=0.003, I²=33.7%, p=0.105) was moderatesignificantwith [sic] low heterogeneity. The pooled effect size of BFR + IT on peak power output (SMDpooled=-0.08, 95% CI -0.56 to 0.40, p=0.739, I²=20.7%, p=0.283) was small and not significant. The pooled effect size of BFR + IT on mean power output (SMDpooled=0.26, 95% CI -0.19 to 0.71, p=0.255, I²=0.0%, p=0.759) was small and not significant. The pooled effect size of BFR + IT on muscular strength (SMDpooled=0.57, 95% CI 0.26 to 0.88, p \u3c 0.001, I²=42.5%, p=0.042) was moderately significant with moderate heterogeneity. Subgroup analyses revealed that the effects of BFR + IT on aerobic capacity, anaerobic capacity, and muscular strength were significantly influenced by intensity (high intensity vs. moderate to low intensity) and training status (trained vs. untrained). To systematically assess the evidence regarding the effects of BFR + IT on enhancing aerobic capacity and muscular strength, but not on improving anaerobic capacity
A260: Physical Therapy Modalities on Pain Following Total Knee Arthroplasty: A Systematic Review and Network Meta-Analysis
No full textThis study aims to perform a network meta-analysis (NMA) to evaluate and compare the effectiveness of various physical therapy modalities in mitigating postoperative pain following total knee arthroplasty (TKA). Method: This systematic review and NMA were conducted according to PRISMA-NMA guidelines. A comprehensive literature search was conducted across multiple databases, including PubMed, SPORTDiscus, The Cochrane Library, Embase, Web of Science, CINAHL Plus, and China National Knowledge Infrastructure, to identify randomized controlled trials (RCTs) assessing the effects of eight physical therapy modalities on postoperative pain in patients with TKA. Data were synthesized using a frequentist framework, and the outcome was pain reduction, assessed using validated pain scales such as the Visual Analogue Scale. A total of 42 RCTs involving 3,165 participants were included. The NMA revealed that electroacupuncture, manual lymphatic drainage (MLD), kinesio taping, and cryotherapy all significantly alleviated pain following TKA compared to controls. Effect sizes (standardized mean differences [SMDs]) ranging from -0.57 (95% confidence interval [CI]: -1.12 to -0.01) for MLD to -0.98 (95% CI: -1.50 to -0.45) for cryotherapy. Among these interventions, cryotherapy demonstrated the greatest likelihood of being the most effective (Surface under the cumulative ranking curve = 88.0%), followed by kinesio taping (83.1%) and electroacupuncture (64.0%). Among these interventions, electroacupuncture (SMD = 0.59, 95% CI: 0.00 to 1.19), kinesio taping (SMD = 0.86, 95% CI: 0.18 to 1.54), and cryotherapy (SMD = 0.95, 95% CI: 0.31 to 1.59) demonstrated significant pain reduction compared to the continuous passive motion. This NMA suggests that cryotherapy is the most effective physical therapy modality for pain relief after TKA, followed by kinesio taping and electroacupuncture. These findings advocate for the incorporation of physical therapy modalities into postoperative care, presenting a ranked comparison of various interventions and supplying robust evidence for clinical decision-making
A104: Explainable AI-Driven Multimodal Biomechanics Analysis of Cheerleading Rotational Skills: A Framework for Real-Time Performance Optimization
No full textCurrent cheerleading skill assessment predominantly relies on coaches\u27 subjective evaluations, lacking quantifiable biomechanical benchmarks. Although electromyography and ground reaction forces provide critical neuromuscular and kinetic insights, their computational integration for automated motion quality assessment remains underdeveloped in aesthetic sports. This study systematically investigates the Tour à la Seconde through explainable machine learning, establishing an interpretable human-AI collaboration framework to bridge empirical coaching knowledge with data-driven biomechanical diagnostics. Twenty-eight elite athletes (18-22 years, 3+ years training) performed standardized Tour à la Seconde while synchronized 14-lead EMG (2000Hz) and triaxial force plate data were captured. Biomechanical feature engineering encompassed: Neuromuscular dynamics: RMS amplitudes, inter-muscular coherence. Kinetic signatures: Vertical force phasing (Fz_peak), medio-lateral impulse (Fy_impulse), dynamic stability index. A hierarchical modeling approach employing PyCaret\u27s automated ML optimized 12 classifiers via leave-athlete-out cross-validation. SHAP value decomposition elucidated biomechanical determinants of expert-rated performance (binary classification threshold: coach score ≥7/10). The XGBoost model achieved superior generalizability (86% cross-validation accuracy vs. LightGBM\u27s 82%, logistic regression\u27s 76%), with three biomechanical drivers identified: Rotational stability control: Fz_peak timing (SHAP=0.41) correlating with centrifugal force management. Ankle proprioception: Gastrocnemius activation intensity (0.33) reflecting plantarflexion precision. Neuromuscular synergy: Inter-muscular coordination (0.28), indicating kinetic chain efficiency. Notably, while decision trees showed complete training accuracy (100%), 21% test accuracy drop revealed critical overfitting risks. The model\u27s strong congruence with expert evaluations (κ=0.72, 95%CI:0.65-0.79) validates its potential as a coach-assistive tool, particularly through real-time visualization of weight transfer dynamics and muscle activation sequencing. This work establishes a novel computational paradigm for aesthetic sports biomechanics, decoding cheerleading rotational skills through explainable multimodal learning. The framework\u27s technical viability for real-time deployment—evidenced by latency-optimized feature engineering (\u3c 50ms processing time)— AI-enhanced athletic training systems. Future research directions include inertial sensor fusion for 3D kinematic validation and cross-domain adaptation to gymnastics and dance
A008: The Impact of Quiet Eye Training on Sport Performance: A Systematic Review
No full textQuiet eye training (QET) is a psychological skill training method aimed at improving skill learning and coping with stress by prolonging the duration of quiet eye fixation. Despite a growing empirical evidence base for QET in academic literature, a systematic review of its effectiveness is lacking. Therefore, this paper focuses on the key issue of whether QET can be used as an effective training means to improve sports performance and systematically summarizes and analyzes the related research on the intervention of sports performance through QET. The aim is to explore the underlying physiological mechanisms of QET and assess its practical intervention effects, thereby informing sports training practices. In this study, we conducted a systematic search across several authoritative databases, including CNKI, PubMed, Web of Science, ScienceDirect, and Google Scholar, up to October 31, 2024. Given the unique characteristics of each database, a corresponding Boolean logic search formula was customized. Eligible documents were identified based on predefined inclusion and exclusion criteria. Then, the quality of the included documents will be evaluated PEDro quality evaluation screening scoring system. Finally, structured data was extracted in accordance with the PICOS principle. After searching and screening, 10 articles were selected for final analysis. Participants involved in the study include athletes, college students, and children of different ages and backgrounds, ranging from 8 to 24.5 years old. The research focuses on two main types of intervention: quiet eye training (QET) and technical training (TT). QET aimed to enhance performance by extending fixation duration and synchronizing vision with motor actions, whereas TT emphasized motor technique aspects. Intervention durations varied from two to eight weeks. The research results generally show that QET, as an intervention method, can effectively improve athletes\u27 performance. Athletes subjected to quiet eye interventions exhibited longer quiet eye (QE) durations and superior sports performance compared to those in control conditions. A positive correlation was observed between the enhancement of QE duration and the outcome of sports performance. The implementation of quiet eye interventions accounts for variations in athletes\u27 skill levels, as the effectiveness of these interventions varies accordingly. Despite the relatively limited impact of quiet eye training on regulating athletes\u27 anxiety, it remains highly significant in enhancing performance under pressure
A051: Spatial Distribution Pattern and Influencing Factors of Ice and Snow Tourism Resources in Shandong Province
No full textAt present, most studies focus on the three provinces in Northeast China, the Beijing-Tianjin-Hebei region, and Inner Mongolia, where the basic conditions of ice and snow tourism are relatively superior, while the spatial distribution characteristics of ice and snow tourism in Shandong Province are relatively scarce. In view of this, this study adopts ArcGIS spatial analysis technology to deeply explore the spatial distribution characteristics of ice and snow tourism resources in Shandong Province, and comprehensively analyze its influencing factors, aiming to provide theoretical suggestions and evidence-based policy references for optimizing the spatial layout of ice and snow tourism resources in Shandong Province and promoting the integrated development of ice and snow industry. Method: In this study, ArcMap 10.8 software and geospatial analysis were used to analyze ice and snow tourism resources in Shandong Province as input elements of point data. The research area was 156,700 square kilometers. E distance method was used to analyze the average nearest proximity, geographical concentration index, nuclear density, and standard deviation ellipse of ice and snow tourism resources in Shandong Province. The distribution and structure of ice and snow tourism resources in Shandong Province are drawn. Finally, the factors affecting the spatial distribution of ice and snow tourism resources were analyzed by using geographic detectors. (1) From the overall provincial level, the spatial distribution type of ice and snow tourism resources in Shandong Province is agglomeration, with strong geographical concentration but unbalanced distribution. (2) The ice and snow tourism resources in Shandong Province are influenced by the third GDP, population density, per capita GDP, expenditure on culture, tourism, sports, and media, total population at the end of the year, highway network density, and other factors. (1) Promote synergy among the three economic circles to form synergy for development. (2) Construct a three-dimensional spatial structure of integrating points into planes and integrating planes into bodies to upgrade the spatial pattern of ice and snow tourism resources. (3) Enhance the dual driving forces of the government and the market to promote the prosperity and development of the ice and snow industry. (4) Expand the population of ice and snow sports and strengthen the construction of ice and snow sports talents
A297: Biomechanical Analysis in Balance and Landing Among Male Collegiate Soccer Athletes with Functional Ankle Instability
No full textFootball is a sport with a high risk of injury, with ankle sprains being common, affecting 12%-23% of players. After functional treatment, over 40% of patients still experience recurrent sprains or giving, known as functional ankle instability (FAI). Limited research exists on the movement patterns of male university football players with or without FAI. Therefore, this study aims to analyze the biomechanical differences in Single-Leg Balance (SLB), Bipodal Landing (BL), and Single-Leg Landing (SLL) between male collegiate soccer athletes with and without functional ankle instability. We recruited 36 male collegiate soccer athletes (mean age: 19.69 ± 1.69 years). A questionnaire was used to collect basic parameters, including age, height, weight, BMI, training hours daily, training days weekly, and ankle injury in the past year. Data were collected using a force plate (KINVENT) during SLB, BL, and SLL tests. The independent sample t-test and non-parametric test were used for statistical analysis. Participants were divided into the injury group (16) and the injury-free group (20). In the SLB test, we measured the difference and sum of the landing ellipse areas, anteroposterior (AP) and mediolateral (ML) axes, AP and ML amplitudes, AP and ML path lengths, and AP and ML mean velocities on both sides. In the BL and SLL tests, we measured the difference and sum of stabilization time, landing ellipse areas, and peak force on both sides. In the eyes-open SLB test, the difference and sum of the landing ellipse areas of the injury group are significantly larger than those of the injury-free group. In the eyes-closed SLB test, the difference and sum of the landing ellipse areas, ML axis, and ML mean velocity of the injury group are significantly greater than those of the injury-free group. Additionally, the sum of the AP axis and the difference in ML amplitude are also significantly larger in the injury group. In the BL test, there are no significant differences between the two groups\u27 data. In the SLL test, the difference in stabilization time is significantly greater in the injury group compared to the injury-free group. Additionally, the difference and sum of the landing ellipse areas on the two sides are also significantly larger in the injury group. Biomechanical analysis of male collegiate soccer athletes with and without FAI in the SLB and SLL tests shows significant differences. These findings can aid in the prevention and monitoring of FAI
A110: Endurance Exercise Modulates PECT Expression to Ameliorate Hyperglycemia-Induced Arrhythmia
No full textThis study, based on a Drosophila model, aims to investigate the regulatory effects of endurance exercise on pect gene expression and its role in mitigating cardiac dysfunction induced by a high-sugar diet. Additionally, it seeks to determine whether endurance exercise ameliorates high-sugar-induced cardiac dysfunction and metabolic imbalance through the modulation of pect expression, thereby providing novel insights into the prevention and treatment of metabolic cardiomyopathy. A total of 300 newly eclosed virgin Drosophila melanogaster of the W1118 strain (within 12 hours of eclosion) were randomly assigned to four groups: control (NC), high-sugar sedentary (HC), normal diet with exercise (NE), and high-sugar with exercise (HE), with 100 flies per group. To generate a cardiac-specific pect knockdown line, UAS-pect virgin flies were crossed with Hand-Gal4 male flies. The high-sugar diet was formulated by supplementing a standard diet with 20% sucrose. Flies in the exercise groups underwent low-intensity endurance training on a treadmill for 2.5 hours per day, five days per week, for two consecutive weeks. After 24 hours post-intervention, pect expression levels in the heart were quantified using RT-qPCR. Cardiac function was assessed by recording 30-second heartbeat videos using an EM-CCD digital camera, and pumping function parameters were analyzed using the SOHA software. In the W1118 strain, a comparison between the NC and NE groups revealed that exercise did not significantly alter pect expression but significantly reduced heart rate (P \u3c 0.001) and increased fractional shortening (P \u3c 0.001). Comparing the NC and HC groups demonstrated that a high-sugar diet significantly upregulated pect expression (P \u3c 0.001), increased heart rate (P \u3c 0.005), and decreased fractional shortening (P \u3c 0.001). Notably, comparing the HE and HC groups showed that exercise counteracted the high-sugar-induced upregulation of pect expression (P \u3c 0.005), significantly reduced heart rate (P \u3c 0.001), increased diastolic diameter (P \u3c 0.001), and prolonged systolic interval (P \u3c 0.001). Under normal dietary conditions, a comparison between the W1118 strain and the Hand-Gal4\u3epectRNAi knockdown strain revealed that cardiac-specific knockdown of pect led to a significant downregulation of its expression (P \u3c 0.001), a marked reduction in heart rate (P \u3c 0.001), and a shortened diastolic interval (P \u3c 0.001). Conclusion: Endurance exercise modulates pect expression in response to a high-sugar diet, thereby enhancing cardiac pumping function. This study is the first to elucidate the pivotal role of pect in the crosstalk between exercise regulation and glucose-lipid metabolism, providing a molecular target for exercise-based interventions in metabolic cardiomyopathy
A050: Research on Digital Empowerment of Mass Sports Life within the Context of National Fitness
No full textThis study commences with a focus on national fitness, conducting an in-depth analysis of the conceptual significance of digital technology and the widespread implementation of mass sports. It elucidates their current developmental status and scrutinizes the practical challenges impeding the digitization of mass sports. Using digital technology as a springboard, this paper investigates the optimal trajectory for the advancement of digitized mass sports, with the aim of fostering superior development in this field. Methodology: This study examines the digital empowerment of mass sports within the framework of national fitness for all. Utilizing research methodologies such as expert interviews, mathematical statistics, and the Delphi method, it contextualizes its findings within the ambit of national fitness for all. The paper further delineates optimized pathways for the digital enhancement of mass sports, ultimately contributing to their high-quality development. Through a comprehensive and detailed examination of the current state of national fitness, digital technology, and mass sports, this study concludes that the level of digital empowerment for the proliferation of mass sports requires improvement. Specific recommendations are provided for the enhancement of digital empowerment in the popularization of mass sports. These suggestions play an instrumental role in elevating the progression of national fitness, leveraging digital technology to aid in the expansion of mass sports, and in executing various national strategies, including national fitness. This study argues that the overall research on national fitness is currently more theoretical than practical, the application ability of digital technology needs to be strengthened, and the concept of mass sports life has not been deeply rooted in the hearts of the people. However, in the new era, the national fitness sector has been continuously improved and updated, and there is a large space for the integration of digital and sports, and the development prospects of mass sports life are good
A128: Correlation Between Balance Ability and Stroke Effectiveness in Female Golfers
No full textTo investigate the effects of balance ability differences on the Stroke Effectiveness of female golfers. Eight excellent female golfers (Group A National first-class athletes and Group B Grade National second-level athletes) were selected, and the FlightScope Xi radar data acquisition detector was used to collect Stroke Effectiveness of the driver, and the difficulty of BalanceCheck was categorized into D1, D5, and D10, to test the golfers\u27 dynamic balance ability. 1) There was no significant difference between Group A and Group B in terms of static and dynamic balance ability (P \u3e 0.05). 2) The mean values of static balance and dynamic balance scores of Group A were greater than those of Group B. The mean values of Axis and dynamic balance scores of Group A were greater than those of Group B. 3) Axis and D1 (Tilt Front) were positively correlated in group A (P ＜0.05), and hitting efficiency（Smash） was positively correlated with D1 (ROT.Speed) in group B (P ＜0.05); Smash was positively correlated with D5 (ROT.Speed) in group B (P ＜0.05); Smash was positively correlated with D10 (Tilt Middle) in dynamic left-right symmetrical balance in group B (P ＜0.05). Group B\u27s Smash was positively correlated with D10 (Tilt Middle) in dynamic left-right symmetrical balance (P ＜0.05); Group B\u27s Smash was positively correlated with D10 (Tilt Middle) in dynamic front-back symmetrical balance (P ＜0.05). 1) The left side of group A was better than the right side in static balance, and group A showed stronger stability and improved Smash in the D10 (ROT.SpeedMax) test of dynamic balance. 2) Group B has larger values of ROT. Speed and ROT.SpeedMax in the dynamic balance ability test, and the tilt angle of D10 (Tilt Left) is larger, which reduces the striking distance. 3) The value of the total dynamic balance score of group A is larger than that of group B. The values of the remaining indicators are smaller than those of group B, which is favorable to increase the striking distance