Improving Badminton Action Recognition Using Spatio-Temporal Analysis and a Weighted Ensemble Learning Model

Incredible progress has been made in human action recognition(HAR),significantly impacting computer vision applications in sports analytics.However,identifying dynamic and complex movements in sports like badminton remains challenging due to the need for precise recognition accuracy and better management of complex motion patterns.Deep learning techniques like convolutional neural networks(CNNs),long short-term memory(LSTM),and graph convolutional networks(GCNs)improve recognition in large datasets,while the traditional machine learning methods like SVM(support vector machines),RF(random forest),and LR(logistic regression),combined with handcrafted features and ensemble approaches,perform well but struggle with the complexity of fast-paced sports like badminton.We proposed an ensemble learning model combining support vector machines(SVM),logistic regression(LR),random forest(RF),and adaptive boosting(AdaBoost)for badminton action recognition.The data in this study consist of video recordings of badminton stroke techniques,which have been extracted into spatiotemporal data.The three-dimensional distance between each skeleton point and the right hip represents the spatial features.The temporal features are the results of Fast Dynamic Time Warping(FDTW)calculations applied to 15 frames of each video sequence.The weighted ensemble model employs soft voting classifiers from SVM,LR,RF,and AdaBoost to enhance the accuracy of badminton action recognition.The E2 ensemble model,which combines SVM,LR,and AdaBoost,achieves the highest accuracy of 95.38%.

Cultivating Youth Interest in Badminton

Conducting an investigation and analysis using literature review methods,the current state of interest cultivation among young badminton players was examined.The findings indicate a less optimistic situation regarding interest development among these young athletes:the initial interest motivation of young badminton players is significantly influenced by parents,with parental focus more on sporting achievements than the child’s happiness,neglecting the emotional well-being of children;coaches prioritize fundamental technical skills over interest cultivation,and the methods used to stimulate interest still exhibit traditional tendencies,overlooking the application of game-based and competitive approaches;there is a lack of practical implementation in interest cultivation;the majority of coaches create an unfavorable classroom atmosphere,easily overlooking students’emotional experiences.Understanding the current development status and trends in interest cultivation for youth badminton,this study analyzed data on interest cultivation methods.It was found that the majority of badminton teaching tends to focus on scientific technical training and physical fitness for young players.While many coaches and parents express affirmation for interest cultivation methods,they are not widely applied in practice at present.Incorporating game-based teaching into badminton instruction has the potential to enhance students’interest in badminton learning,especially for novice young players,facilitating the early establishment of a love for badminton.

The Effectiveness of Group Cooperative Learning Method in Badminton Teaching in Colleges and Universities

In college badminton teaching,teachers utilize the group cooperative learning method,which not only helps to improve students’badminton skill level but also cultivates their teamwork spirit,communication skills,and self-management ability unconsciously.In view of this,this paper mainly describes the significance of applying the group cooperative learning method in college badminton teaching,analyzes the current problems in college badminton teaching,and aims to discover effective development strategies for group cooperative learning method in college badminton teaching in order to improve the effectiveness of college badminton teaching.

Application of Serum CK and BUN Determination in Monitoring Pre-Competition Training of Badminton Athletes

In order to investigate the feasibility of serum creatine kinase （CK） and blood urea nitrogen （BUN） in monitoring pre-competition training of badminton athletes, the pre-competition training load of 20 badminton athletes was studied, and serum CK and BUN were determined before, immediate and next morning after training. The results showed that after intensive training for one week, serum CK levels were significantly increased by 57.53 mmol/L （P〈0.05）. After regulation of the training intensity, average serum CK levels were increased by 21.79 mmol/L （P〈0.05）. BUN contents were increased by 0.83 mmol/L on average with the difference being not significant （P〉0.05）. After intermittent training, there was significant difference in the average increased levels of serum CK in athletes （P〈0.05）. There was significant difference before and after regulation of training （P〈0.05）. The increased levels of BUN were 0.78 mmol/L without significant difference （P〉0.05）. It was concluded that serum CK was one of the biochemical indicators monitoring the training load sensitivity of badminton athletes, but BUN was of little value in monitoring the training load. Both serum CK and BUN recovered slowly after one-week intensive training and intermittent training, suggesting the metabolic mechanism of human body in training needs further study.

Enhanced inhibitory control during re-engagement processing in badminton athletes:An event-related potential study

Purpose:The purpose of present study was to investigate the impact of sport experience on response inhibition and response re-engagement in expert badminton athletes during the stop-signal task and change-signal task.Methods:A total of 19 badminton athletes and 20 nonathletes performed both the stop-signal task and change-signal task.Reaction times(RTs)and event-related potentials were recorded and analyzed.Results:Behavioral results indicated that badminton athletes responded faster than nonathletes to go stimuli and to change signals,with faster change RTs and change-signal RTs,which take into consideration the variable stimulus onset time mean.During successful change trials in the change-signal task,the amplitudes of the event-related potential components N2 and P3 were smaller for badminton athletes than for nonathletes.Moreover,change-signal RTs and N2 amplitudes as well as change RTs and P3 amplitudes were significantly correlated in badminton athletes.A significant correlation was also found between the amplitude of the event-related potential component N1 and response accuracy to change signals in badminton athletes.Conclusion:Moderation of brain cortical activity in badminton athletes was more associated with their ability to rapidly inhibit a planned movement and re-engage with a new movement compared with nonathletes.The superior inhibitory control and more efficient neural mechanisms in badminton athletes compared with nonathletes might be a result of badminton athletes’ professional training experience.

The Influence of the Mental Rotation Task on Mental Rotation Skills in Badminton

The current study is the first to examine the idea that badminton players may use mental rotation skills to imagine the flight direction of the shuttlecock.The study included badminton experts,near-experts,and non-badminton players and asked them to complete a specially designed mental rotation task,inspired by the methods from Shepard and Metzler(1971).The findings showed no significant group difference between the three expertise groups.This is in support of previous research examining visuo-spatial skills in badminton(Ozel,Larue,&Molinaro,2002;2004;Wang et al.,2015).The current study therefore concluded that badminton players may not have greater mental rotation capacity than other groups.However,these studies found that the badminton players responded quicker on the task than non-badminton players.The current study therefore hypothesised that badminton players might have greater mental rotation awareness,rather than mental rotation capacity,which allows them to respond quicker to visuo-spatial tasks.

Risk Factors for Shoulder Pain in Japanese Badminton Players： A Quantitative-Research Survey

This study aimed to elucidate the key risk factors for shoulder pain in Japanese middle school-, high school-, and university-level badminton players and use a regression formula to predict the probability of shoulder pain onset based on risk factor combinations. Based on a self-report questionnaire survey, we included 461 individuals （102 middle school students, 134 high school students, and 225 university students） with a history of shoulder pain in the previous year and 541 individuals with no shoulder pain in the previous year. Then, we performed logistic regression analysis of individual characteristics and history of shoulder pain to analyze the factors associated with shoulder pain onset. Analysis of patients excluding those currently experiencing shoulder pain indicated that a history of shoulder pain （〉 1 year previously） predicted shoulder pain onset. Analysis of patients excluding those with a history of shoulder pain indicated that undergoing care, being of university age, having a long history of competing, and short cool-down times were associated with recurrent pain. However, results were different for each age group. The fact that half the Japanese middle school, high school, and university badminton players had a history of shoulder pain suggests that they will experience recurrent shoulder pain. The results also suggest that different factors are important in each age group. Thus, it is critical to establish evidence-based countermeasures to prevent shoulder pain that interferes with play.

Research on the Principles of Interactive Teaching and Practice Teaching with the Applications on Badminton Education in Colleges

In this paper, we conduct research on the principles of interactive teaching and practice teaching with the applications on badminton education in the colleges. Thinking teaching method is not only a kind of the change of teaching methods, as well as change of teaching ideas, it focuses on teaching, teaching objectives, teaching idea has profound changes, better reflect the ideology of the quality education. Practice the thinking teaching method for physical education teachers have a new teaching concept, the value of the face up to the cultivation of the ability and intelligence. At the same time also require physical education teachers have a relatively wide range of knowledge, especially about scientific discovery and scientific knowledge of thinking. With the combination of the general interactive teaching and practice teaching approaches, we propose the novel paradigm for badminton education which holds the vital significance.

Optimization and Development of New Badminton Machine with Launching Roller

Shuttlecock used for badminton is light in mass so that its flight locus is strongly influenced by air. The highest launching velocity of the shuttlecock by professional badminton players exceeds speeds of over 83.3 m/s （300 km/hr）. In this study, a new badminton server machine was developed. The badminton machine can launch the shuttlecocks at wide range of speeds up to 52.8 m/s （190 km/hr） and with many shot types such as smash, clear and so on, which are easily achieved. The finite element models of a shuttlecock with feathers and the badminton machine were made, and the launching simulations of the shuttlecock were tried. The roller with a large diameter attained a higher speed of the shuttlecock than the small rollers for all kinds of launching conditions. The taper angles of the roller edge and the insert height of the shuttlecock relative to the roller surface were optimized for attaining the maximum shuttle speed by the response surface approach. After the optimization, the performance of the badminton machine had been improved about 7% as the shuttle speeds increase and the stress causing the shuttle deterioration decreased.

A Brief Analysis of Multi-ball Training in Badminton

With the gradual improvement of badminton level in China,the research on the teaching and training methods of badminton has been further enriched.Badminton multi-ball training is an important training method which can improve the training intensity and the actual competition ability of the exerciser.It can comprehensively reflect the request of the opponent’s tactics,footwork and strain ability in the badminton event.In the course of training,the intensity of training load can be adjusted reasonably by controlling time,frequency and speed.Therefore,multi-ball training has gradually become a training mode widely used in badminton training.This article will briefly analyze the composition,classification,and function of multi-ball training,and according to the various forms and methods of badminton training at present,put forward appropriate suggestions on the application of multi-ball training in badminton,in order to improve the badminton multi-ball training theory.

Research on Business Value and Development Strategy of Badminton in China

This paper analyses the connotation of business value of china＇s badminton sports from the present situation of the commercial development and the existing problems of the badminton in china. To put it another way, the commercial value of badminton means the returns of investing badminton or its related industries.

羽毛球运动中体能训练与技术训练的优化整合策略研究

该研究旨在探讨羽毛球运动中体能训练与技术训练的优化整合策略。通过文献资料法、逻辑分析法等研究方法,提出训练期化分段,相互融合;技术为主导,体能为支撑;训练负荷与恢复的动态平衡;个体化训练,强化特长等优化整合策略,以帮助教练员更加科学地制订训练计划,提高运动员的体能素质和技术水平,从而提升其竞技能力。研究结果表明,采用这些优化整合策略可以有效提高运动员的体能和技术水平,同时减少运动损伤的发生,延长运动寿命。因此,这些策略对于羽毛球运动员的训练和比赛具有重要的意义。

高校羽毛球课程网络教学模式的应用研究

将网络教学模式应用于高校羽毛球课程教学的实践中,研究网络羽毛球课程的教学模式对高校学生体育学习态度的影响。通过线上与线下结合,试图改进传统羽毛球教学过程中的不足,提高教学效果,为高校大学生羽毛球课程的教学改革提供建议。

羽毛球运动训练对航母舰载机飞行学员颈痛的干预效果研究

目的评估羽毛球运动对舰载机飞行学员颈痛的干预效果,为该运动预防和缓解舰载机飞行学员颈痛提供科学依据。方法根据纳入和排除标准筛选16名航母舰载机飞行学员作为受试者,随机分为运动康复组和对照组,每组各8人。运动康复组除进行部队日常训练外,另进行每周3次,每次1 h的羽毛球运动;对照组进行部队日常训练,不做其他干预。研究为期3个月。颈痛的干预效果以实验前后颈椎功能障碍指数(NDI)评分、视觉模拟疼痛量表(VAS)、颈椎活动度(CROM)、颈部最大肌力、表面肌电信号均方根值(RMS)、积分肌电值(iEMG)作为评价指标。结果运动康复组NDI评分较干预前具有显著性差异(P<0.05),对照组NDI评分较干预前无显著性差异(P>0.05)。运动康复组VAS评分较干预前有显著性差异(P<0.01),对照组VAS评分较干预前无显著性差异(P>0.05)。运动康复组受试者干预后颈椎最大活动度在各方向均有所增加,且左屈、右屈活动度较干预前具有显著性差异(P<0.05),其余方向无显著性差异(P>0.05);对照组颈椎各方向最大活动度较干预前无显著性差异(P>0.05)。运动康复组受试者颈部最大肌力在前屈、后伸、左屈方向较干预前具有显著性差异(P<0.01),右屈、左旋、右旋值较干预前具有显著性差异(P<0.05);左右侧胸锁乳突肌RMS在四个方向动作中无显著性差异(P>0.05),左侧斜方肌上束在前屈和右屈动作中RMS具有显著性差异(P<0.05),在后伸和左屈动作中无显著性差异(P>0.05),右侧斜方肌上束在四个方向动作中无显著性差异(P>0.05)。运动康复组受试者干预后在前屈、后伸以及右屈运动中,4块肌肉iEMG均大于干预前,但无显著性差异(P>0.05)。在左屈动作中,左侧胸锁乳突肌与右侧斜方肌上束iEMG大于干预后,右侧胸锁乳突肌和左侧斜方肌上束iEMG小于干预后,但均无显著性差异(P>0.05)。结论羽毛球运动干预能够缓解航母舰载机飞行学员的颈部疼痛,使其颈椎功能障碍得到一定程度的恢复,并且能够增加颈部灵活性,增强颈部肌力,同时激活深层肌肉参与维持颈部稳定,有效提升颈部肌肉群的抗疲劳能力。

运动生物力学在羽毛球鞋设计中的运用研究

羽毛球鞋是运动员和运动表面的介质,羽毛球运动需要基于高性能羽毛球鞋完成技术动作与步法。羽毛球鞋不仅要为运动员提供充足支撑力,还要具备良好的减震性与抓地力。羽毛球鞋的性能直接影响运动员下肢动作与负荷形式,是提高运动表现、预防运动损伤的关键要素。因此,应基于运动生物力学分析,明确运动员在羽毛球运动动作中所承受的力,以科学合理地设计与人体工程学原理高度契合的羽毛球鞋。据此,本文详细分析了羽毛球鞋的运动生物力学特征,从运动生物力学视角对羽毛球鞋鞋面、鞋底、后跟设计进行了探究。

贵州省高校大学生羽毛球爱好者消费行为研究

羽毛球作为一项备受欢迎的体育运动,在大学校园中拥有广泛的群体支持和参与度。随着社会经济的发展和生活水平的提高,大学生羽毛球爱好者的消费行为逐渐成为一个备受关注的研究领域。基于此,采用文献资料法、问卷调查法、数理统计法等研究方法,通过调查大学生羽毛球爱好者的消费动机、参与频率、消费行为和消费满意度等,了解贵州省高校大学生羽毛球爱好者的消费现状及其规律,针对存在的问题提出对策,指导羽毛球爱好者合理地参与羽毛球运动消费,推动羽毛球运动在高校得到更好的发展。

一种适用羽毛球拍的抗菌有机硅密封胶性能测试研究

为提升羽毛球拍专用有机硅密封胶的抗菌性能,提出了一种融合C18-QAS抗菌剂的抗菌功能性有机硅密封胶材料。在聚硅氧烷基材的基础上导入C18-QAS抗菌剂,再通过硫化处理的方式制备出抗菌功能性有机硅密封胶。为验证抗菌功能性有机硅密封胶的综合性能,运用邵氏硬度计、拉力材料试验仪以及测角仪等设备对该材料的力学性能和亲疏水性能进行测试,通过乙酰接触法和甲苯平衡溶胀法对该材料的表干性能和交联密度进行测试,并根据测试结果来确定C18-QAS抗菌剂的合理掺量。经试验研究发现,当C18-QAS抗菌剂掺量为3%时,抗菌性有机硅密封胶的综合性能最为理想,可满足羽毛球拍在粘接密封工艺阶段的使用需求。

目标设置对羽毛球爱好者发球准确率及运动自信心的影响

羽毛球比赛中发球质量是直接影响到运动员后期战术实施顺利与否的关键因素之一。运动员的发球质量与其运动自信心、自我调控等心理机能相互影响。在羽毛球运动训练中设置目标,能较好地提高羽毛球的专项素质,特别是发球技术,还能提高心理技能水平。在日常训练中,应对发球技术进行有针对性的练习,同时也要对运动员的自信心、自我效能感等心理素质进行训练,促进羽毛球业余爱好者的心理素质和发球技术的提高。

基于图像处理的羽毛球发球高度检测技术

世界羽联发布最新规定,要求发球时击球点的高度不能超过1.15m。目前,并没有能够准确地测量出发球时击球点的高度的有关装置,是否违规只能由裁判目测后判定,具有较大主观性。图像处理技术具有原理简单、实现成本较低、与被测物体不接触、采集信息的方式是非侵犯性等优点。因此,提出了一种基于图像处理的羽毛球发球高度检测的技术。首先采集运动员发球时的视频数据,为了得到视频中羽毛球的位置,采用了二值化、形态学滤波、特征检测等多种图像处理技术。得到羽毛球位置后,通过叠加帧得到羽毛球的运动轨迹,轨迹斜率的突变点即为击球点,最后通过搜索图像中地面的位置进行转换来得到击球点的实际高度。为了验证提出的检测方法的有效性,采用实际击球实验多次进行验证。结果表明,该技术具有良好的检测效果,误差较小,能够满足击球点检测的基本需求。

东京奥运会羽毛球赛抽签原理的双重视角及其启示

东京奥运会羽毛球竞赛规则是世界羽联探索羽毛球运动发展道路进程中的重要理论成果,其中抽签原理体现了调动世界各国羽毛球协会运动员积极参赛的重要思想。当前的这一抽签原理形成于伦敦2012年奥林匹克羽毛球运动可持续发展理论与实践关系状况的深入思考,尤其是对伦敦奥运会女子双打项目抽签弊端的深刻反思。采用文献资料法、专家访谈法、数理统计法、对比分析法等,对当前抽签原理从“机遇均等”与“平衡控制”两个方面论证抽签的合理性,从竞赛规则、赛制调整、抽签改革和重要补充四个方面阐发了增强比赛观赏性和激烈性的思考,此外也蕴含着在实践中及时总结经验的改革方法论。这些宝贵思想在未来我国羽毛球项目高水平职业赛事或群众性业余赛事的发展中值得借鉴和参考。