International Journal of Computer Science in Sport最新文献_第6页

Multifactorial analysis of factors influencing elite Australian football match outcomes: a machine learning approach 影响澳大利亚精英足球比赛结果因素的多因素分析：机器学习方法

International Journal of Computer Science in Sport Pub Date : 2019-12-01 DOI: 10.2478/ijcss-2019-0020

J. Fahey-Gilmour, B. Dawson, P. Peeling, J. Heasman, B. Rogalski

{"title":"Multifactorial analysis of factors influencing elite Australian football match outcomes: a machine learning approach","authors":"J. Fahey-Gilmour, B. Dawson, P. Peeling, J. Heasman, B. Rogalski","doi":"10.2478/ijcss-2019-0020","DOIUrl":"https://doi.org/10.2478/ijcss-2019-0020","url":null,"abstract":"Abstract In Australian football (AF), few studies have assessed combinations of pre- game factors and their relation to game outcomes (win/loss) in multivariable analyses. Further, previous research has mostly been confined to association-based linear approaches and post-game prediction, with limited assessment of predictive machine learning (ML) models in a pre-game setting. Therefore, our aim was to use ML techniques to predict game outcomes and produce a hierarchy of important (win/loss) variables. A total of 152 variables (79 absolute and 73 differentials) were used from the 2013–2018 Australian Football League (AFL) seasons. Various ML models were trained (cross-validation) on the 2013–2017 seasons with the–2018 season used as an independent test set. Model performance varied (66.5-73.3% test set accuracy), although the best model (glmnet – 73.3%) rivalled bookmaker predictions in the same period (70.9%). The glmnet model revealed measures of team quality (a player-based rating and a team-based) in their relative form as the most important variables for prediction. Models that contained in-built feature selection or could model non-linear relationships generally performed better. These findings show that AFL game outcomes can be predicted using ML methods and provide a hierarchy of predictors that maximize the chance of winning.","PeriodicalId":38466,"journal":{"name":"International Journal of Computer Science in Sport","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44791506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Concurrent validity and intra-trial reliability of a bluetooth-embedded inertial measurement unit for real-time joint range of motion 蓝牙嵌入式实时关节运动范围惯性测量单元的并行有效性和试验内可靠性

International Journal of Computer Science in Sport Pub Date : 2019-12-01 DOI: 10.2478/ijcss-2019-0015

D. Oh, W. Lim, N. Lee

{"title":"Concurrent validity and intra-trial reliability of a bluetooth-embedded inertial measurement unit for real-time joint range of motion","authors":"D. Oh, W. Lim, N. Lee","doi":"10.2478/ijcss-2019-0015","DOIUrl":"https://doi.org/10.2478/ijcss-2019-0015","url":null,"abstract":"Abstract Along with advancements in science and technology, anthropometric measurements using electronic devices have become possible, and research is being actively conducted on this topic. Recently, devices using Bluetooth that are portable because of their small size have been developed to allow real-time measurements and recording. This study investigated the concurrent validity and intra-trial reliability of a recently developed Bluetooth-embedded inertial measurement unit. Thirty-seven healthy, young adult participants (age = 22.1±1.2 years, height = 166.8±1.6 cm, mass = 61.9±12.3 kg) were included in the study. The knee extension angles during active knee extension were measured for validity, using both the Bluetooth-embedded inertial measurement unit and the standard goniometer. Intra-trial reliability was tested for consistency during repeated measurements. The intra-class correlation coefficients value for the concurrent validity between the Bluetooth-embedded inertial measurement unit and standard goniometer was 0.991, and the values for the intra-trial reliability of the two devices were 0.973 and 0.963, respectively. Based on its high validity and reliability, the Bluetooth-embedded device may be useful for evaluating functional impairment and exercise performance ability by real-time measurements of joint ranges of motion in clinical rehabilitation or sports fields.","PeriodicalId":38466,"journal":{"name":"International Journal of Computer Science in Sport","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43797307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Analyzing passing networks in association football based on the difficulty, risk, and potential of passes 基于传球难度、风险和潜力的足协足球传球网络分析

International Journal of Computer Science in Sport Pub Date : 2019-12-01 DOI: 10.2478/ijcss-2019-0017

Astrid Salte Wiig, Else Marie Håland, M. Stålhane, L. M. Hvattum

引用次数: 4

Evaluation of mobile applications for fitness training and physical activity in healthy low-trained people - A modular interdisciplinary framework 评估健康低训练人群健身训练和身体活动的移动应用程序——模块化跨学科框架

International Journal of Computer Science in Sport Pub Date : 2019-12-01 DOI: 10.2478/ijcss-2019-0016

J. Wiemeyer

引用次数: 5

Gait Training in Orthopedic Rehabilitation after Joint Replacement - Back to Normal Gait with Sonification? 关节置换术后骨科康复的步态训练-超声恢复正常步态?

International Journal of Computer Science in Sport Pub Date : 2019-09-01 DOI: 10.2478/ijcss-2019-0012

Juliane Pietschmann, F. Flores, T. Jöllenbeck

{"title":"Gait Training in Orthopedic Rehabilitation after Joint Replacement - Back to Normal Gait with Sonification?","authors":"Juliane Pietschmann, F. Flores, T. Jöllenbeck","doi":"10.2478/ijcss-2019-0012","DOIUrl":"https://doi.org/10.2478/ijcss-2019-0012","url":null,"abstract":"Abstract Even several years after total hip (THR) and total knee replacement (TKR) surgery patients frequently show deficient gait patterns leading to overloads and relieving postures on the contralateral side or in the spine. Gait training is, in these cases, an essential part of rehabilitation. The aim of this study was to compare different feedback methods during gait training after THR and TKR focusing, in particular, on auditory feedback via sonification. A total of 240 patients after THR and TKR were tested in a pre-post-test design during a 3-week rehabilitation period. Even though sonification did not show, statistically, a clear advantage over other feedback methods, it was well accepted by the patients and seemed to significantly change gait pattern during training. A sudden absence of sonification during training led to a rapid relapse into previous movement patterns, which highlights its effectiveness in breaking highly automated gait patterns. A frequent use of sonification during and after rehabilitation could, hence, reduce overloading after THR and TKR. This may soon be viable, since new technologies, such as inertial measurement units, allow for wearable joint angle measurement devices. Back to normal gait with sonification seems possible.","PeriodicalId":38466,"journal":{"name":"International Journal of Computer Science in Sport","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47918380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Energy Cost of Running Under Hypogravity in Well-Trained Runners and Triathletes: A Biomechanical Perspective 从生物力学角度看训练有素的运动员和铁人三项运动员在低重力下跑步的能量消耗

International Journal of Computer Science in Sport Pub Date : 2019-09-01 DOI: 10.2478/ijcss-2019-0014

O. Ueberschär, D. Fleckenstein, F. Warschun, Nico Walter, Jan Wüstenfeld, B. Wolfarth, M. Hoppe

{"title":"Energy Cost of Running Under Hypogravity in Well-Trained Runners and Triathletes: A Biomechanical Perspective","authors":"O. Ueberschär, D. Fleckenstein, F. Warschun, Nico Walter, Jan Wüstenfeld, B. Wolfarth, M. Hoppe","doi":"10.2478/ijcss-2019-0014","DOIUrl":"https://doi.org/10.2478/ijcss-2019-0014","url":null,"abstract":"Abstract Hypogravity treadmills have become a popular training tool in distance running and triathlon. Counter-intuitively, tibial acceleration load is not attenuated by hypogravity unloading during running, while, equally surprisingly, leaps become flatter instead of higher. To explain these effects from a biomechanical perspective, Polet, Schroeder, and Bertram (2017) recently developed an energetic model for hypogravity running and validated it with recreational athletes at a constant jogging speed. The present study was conducted to refine that model for competitive athletes at relevant running speeds of 12–22 km h−1 and gravity levels of 100 %, 80 % and 60 %. Based on new experimental data on 15 well-trained runners in treadmill tests until volitional exhaustion, the enhanced semi-empirical model well describes energy expenditure and the observed biomechanical effects of hypogravity running. Remarkably, anaerobic contributions led to an increase in energy cost per meter for speeds above 16–18 km h−1 (p < 0.001), irrespective of hypogravity unloading. Moreover, some converging trends were observed that might reflect general adaptations in running motor control for optimization of efficiency. In essence, the outcome of this research might help sports scientists and practitioners to design running programs for specific training stimuli, e.g. conditioning of anaerobic energy metabolism.","PeriodicalId":38466,"journal":{"name":"International Journal of Computer Science in Sport","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45878145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Data Mining in Elite Beach Volleyball – Detecting Tactical Patterns Using Market Basket Analysis 精英沙滩排球的数据挖掘——利用市场篮分析发现战术模式

International Journal of Computer Science in Sport Pub Date : 2019-09-01 DOI: 10.2478/ijcss-2019-0010

S. Wenninger, D. Link, M. Lames

引用次数: 4

Possibilities to Use a Virtual Opponent for Enhancements of Reactions and Perception of Young Karate Athletes 使用虚拟对手增强年轻空手道运动员反应和感知的可能性

International Journal of Computer Science in Sport Pub Date : 2019-09-01 DOI: 10.2478/ijcss-2019-0011

K. Petri, S. Masik, Marco Danneberg, Peter Emmermacher, K. Witte

{"title":"Possibilities to Use a Virtual Opponent for Enhancements of Reactions and Perception of Young Karate Athletes","authors":"K. Petri, S. Masik, Marco Danneberg, Peter Emmermacher, K. Witte","doi":"10.2478/ijcss-2019-0011","DOIUrl":"https://doi.org/10.2478/ijcss-2019-0011","url":null,"abstract":"Abstract We conducted a virtual reality (VR) training with ten sessions, performed by fifteen young karate athletes, who responded to attacks of a virtual opponent to improve their response behavior and their decision-making. The control groups continued with their normal training. Results of the Friedman tests with subsequent Dunn-Bonferroni post-hoc-tests and estimation of effect sizes showed that the karate specific response behavior (measured by a movement analysis) improved significantly due to the training. The parameters time for response (as the time for the attack initiation) and response quality improved with large effect sizes for the intervention groups, whereas the control groups demonstrated improvements with only small effect sizes. The unspecific response behavior (analyzed by two forms of the reaction test of the Vienna test system) did not show any significant changes. Paired t-tests revealed an improvement in attack recognition. While in the pretests, the intervention groups responded to late movement stages of the attack (execution of the main phase), they responded to early movement stages (reduction of distance and preparing steps) in the posttests. Furthermore, Friedman-tests and bivariate correlation analysis showed that the intervention groups were highly motivated to perform the VR training because of the new and safe learning conditions.","PeriodicalId":38466,"journal":{"name":"International Journal of Computer Science in Sport","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46292736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Validation of Sensor-Based Game Analysis Tools in Tennis 基于传感器的网球比赛分析工具的验证

International Journal of Computer Science in Sport Pub Date : 2019-09-01 DOI: 10.2478/ijcss-2019-0013

A. Edelmann-Nusser, A. Raschke, A. Bentz, S. Montenbruck, Jürgen Edelmann-Nusser, M. Lames

{"title":"Validation of Sensor-Based Game Analysis Tools in Tennis","authors":"A. Edelmann-Nusser, A. Raschke, A. Bentz, S. Montenbruck, Jürgen Edelmann-Nusser, M. Lames","doi":"10.2478/ijcss-2019-0013","DOIUrl":"https://doi.org/10.2478/ijcss-2019-0013","url":null,"abstract":"Abstract Three inertial measurement unit (IMU) based tennis sensor systems from BABOLAT (PURE DRIVE PLAY, POP) and HEAD (Tennis Sensor) and a camera-based system (PlaySight) were tested with respect to the question whether the information about the number of strokes by swing type and spin type in training exercises and/or matches and the average as well as the maximum speed of the service per session are reliable. Subsequently, the question whether the mechanical properties of the BABOLAT PURE DRIVE PLAY racket are the same as the mechanical properties of the BABOLAT PURE DRIVE racket without IMU was addressed. For swing types in standard exercises the results are acceptable for forehand groundstrokes, backhand groundstrokes and services but not for volleys. In a match environment we find inacceptably high errors (>10%) for the number of strokes for forehand and completely inacceptable levels for volley. The wrist-based IMU of BABOLAT POP has not reached an acceptable accuracy at all. For spin types the results are acceptable. The large variances in service speed assessment between devices make it doubtful whether any of them may be used for the control of training processes aiming at increasing the average service speed The mechanical properties of the BABOLAT rackets with and without IMU are quite the same.","PeriodicalId":38466,"journal":{"name":"International Journal of Computer Science in Sport","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46153820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

The Relationship between Motivation of Social Viewing Experiences, Satisfaction, and Loyalty in Sports Broadcasting 体育广播中社会观看体验动机、满意度与忠诚度的关系

International Journal of Computer Science in Sport Pub Date : 2019-07-01 DOI: 10.2478/ijcss-2019-0009

Y. Suh, Taewook Chung, Jong Min Kim

引用次数: 5