International Journal of Racket Sports Science最新文献

{"title":"Monitoring technical tennis performance under increasing physical intensity by the PTTF-test","authors":"Michel S. Smit","doi":"10.30827/digibug.74115","DOIUrl":"https://doi.org/10.30827/digibug.74115","url":null,"abstract":"Monitoring technical skills under increasing physical intensity is important for determining a player’s performance level in tennis. Therefore, the aim of this study was to determine to what extent the new Physical Technical Tennis-specific Field test (PTTF-test) was able to capture fluctuations in technical skill under increasing physical intensity in adolescent talented tennis players. Forty adolescent players (21 males, 19 females, mean age = 15.4 yrs) performed the PTTF-test until exhaustion (i.e., when they were not able to hit two subsequent oncoming balls with an adequate technique). Technical skills (stroke velocity, stroke accuracy, VA-index and percentage errors) were compared between physical intensity levels, age categories and genders. For all age categories and genders, physical intensity (heart rate) increased between the ‘BASELINE’-situation and the ‘FINAL’-situation (p<.001). All technical skills, i.e. stroke velocity, stroke accuracy, VA-index and percentage errors, decreased when comparing the FINAL intensity level to the BASELINE intensity level (p<.001). Players in older age categories (16+) reached a higher PTTFlevel and exhibited lower mean heart rates than players in the youngest age category (U14) in both the ‘BASELINE’-situation and the ‘FINAL’-situation depending on the level players reached (p<.010). These findings show that the PTTF-test is able to analyse and monitor the performance of technical skills under increasing physical intensity in adolescent talented tennis players.","PeriodicalId":393687,"journal":{"name":"International Journal of Racket Sports Science","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127945687","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}

{"title":"A narrative review of Achilles tendon ruptures in racket sports","authors":"Elin Larsson","doi":"10.30827/digibug.76979","DOIUrl":"https://doi.org/10.30827/digibug.76979","url":null,"abstract":"This review aims to report the existing research about Achilles tendon ruptures (ATR) in racket sports. Further, this narrative review will also include the acute management, rehabilitation, treatment and prognosis of an ATR. ATR is a common injury among individuals playing racket sports, however, the literature is limited and not up to date. Previous research claims that up to 70 percent of all ATR is related to sports activities where racket sports dominate. A large number of patients sustaining an ATR return to sport within a year from injury.","PeriodicalId":393687,"journal":{"name":"International Journal of Racket Sports Science","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129801041","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}

{"title":"Kinematics differences between a one-handed and a two-handed tennis backhand using gyroscopes. An exploratory study","authors":"E. Ruiz-Malagón","doi":"10.30827/digibug.76982","DOIUrl":"https://doi.org/10.30827/digibug.76982","url":null,"abstract":"","PeriodicalId":393687,"journal":{"name":"International Journal of Racket Sports Science","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131651048","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}

{"title":"Analysis of the effectiveness of technical-tactical elements during the serve-receive phase in youth female table tennis athletes","authors":"Andreas Nikolakakis","doi":"10.30827/digibug.73534","DOIUrl":"https://doi.org/10.30827/digibug.73534","url":null,"abstract":"","PeriodicalId":393687,"journal":{"name":"International Journal of Racket Sports Science","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125514793","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}

{"title":"Early talent identification in tennis: A retrospective study","authors":"Maximilian Siener","doi":"10.30827/digibug.73876","DOIUrl":"https://doi.org/10.30827/digibug.73876","url":null,"abstract":"Talent identification often begins at the age of entry into a sport: even under the age of 9 years old (U9). However, the success of such early talent identification is questionable. Therefore, the aim of this long-term retrospective study is to examine whether today’s more successful junior tennis players already differed from today’s less successful junior tennis players in terms of physical fitness and motor competence when both groups were U9. If significant differences in performance characteristics between successful and less successful tennis players were already apparent at this young age, such characteristics could be used to forecast talent at an early stage. Based on their current tennis success, a total of 174 junior tennis players were divided into national ranked players (n = 16: players who achieved a place in the official national junior tennis ranking list of the German Tennis Federation) and non-ranked players (n = 158). All of these players had already participated in two anthropometric and nine physical fitness and motor competence tests at U9 (e.g., sprint, endurance run, ball throw). Using a MANCOVA and a correlation analysis, we retrospectively examined whether the two current performance groups had differed significantly in their U9 test scores and whether these athletes’ U9 test performance scores correlated with their current playing success. No significant (p < 0.05) differences were found between ranked and non ranked junior players in terms of U9 body weight and height. However, with the exception of flexibility, all physical fitness tests and motor competence tests showed significant results. The ball throw was the most relevant test parameter, as it showed the highest prognostic validity (effect size ƞ 2 = .157 and r = .360). This test was followed by the two test tasks standing long jump (effect size ƞ 2 = .081 and r = .287) and endurance run (effect size ƞ 2 = .065 and r = .296). Overall, the U9 findings are in line with the results from other studies of U12‒U18 tennis players. Therefore, it can be assumed that talent specific characteristics remain stable over a certain period of time and that U9 test performances may provide an early indication of later playing success.","PeriodicalId":393687,"journal":{"name":"International Journal of Racket Sports Science","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128931252","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}

{"title":"Indistinguishability of Racket and Body Kinematics during Different Table Tennis Serves for International Elite and Intermediate Players","authors":"Y. Iino","doi":"10.30827/digibug.72312","DOIUrl":"https://doi.org/10.30827/digibug.72312","url":null,"abstract":"Table tennis serves are strokes in which disguise and deception skills are important. This study aimed to investigate whether international elite table tennis players can make their racket and body kinematics more indistinguishable than intermediate players during three different serve types. Five former international elite and 8 intermediate players performed 3–12 trials of each serve type. The kinematics of the server’s body and the racket was determined using a motion capture system. The time instant of racket-ball impact was determined using a high-speed video camera with the motion capture system. Misclassification rates when the serve type was classified using the racket and body kinematics were determined using linear discriminant analysis. Elite players showed higher misclassification rates for the racket kinematics than intermediate players during the early swing and follow-through phases. The body kinematics suggested that the elite players made their racket kinematics more indistinguishable using different approaches between the early swing and follow-through phases. The elite players tended to make the racket’s angular velocity more similar and make the wrist rotational variables more indistinguishable in different serves compared to the intermediate players during the early swing phase. In contrast, the elite players made the racket’s linear motion more variable within individual serve types than the intermediate players during the follow-through. The results suggest that intermediate players are recommended to practice making wrist angular motions more similar during the early swing phase and making racket linear motions more variable during the follow-through in order to improve the disguise skill in table tennis serves.","PeriodicalId":393687,"journal":{"name":"International Journal of Racket Sports Science","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124967588","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}

{"title":"Predicting Table Tennis Tournaments: A comparison of statistical modelling techniques","authors":"Jan Lennartz","doi":"10.30827/digibug.73877","DOIUrl":"https://doi.org/10.30827/digibug.73877","url":null,"abstract":"","PeriodicalId":393687,"journal":{"name":"International Journal of Racket Sports Science","volume":"27 1-2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132503275","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}

{"title":"The relationship between service performance and physical strength focusing on speed and spin rate in Japanese elite junior tennis players","authors":"Nahoko Koya","doi":"10.30827/digibug.73873","DOIUrl":"https://doi.org/10.30827/digibug.73873","url":null,"abstract":"","PeriodicalId":393687,"journal":{"name":"International Journal of Racket Sports Science","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123576674","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}

{"title":"Knowledge and Competences of Racket Sports Coaches: What do They Think and Know?","authors":"Mairin del Corto Motta","doi":"10.30827/digibug.70280","DOIUrl":"https://doi.org/10.30827/digibug.70280","url":null,"abstract":"","PeriodicalId":393687,"journal":{"name":"International Journal of Racket Sports Science","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117332578","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}

{"title":"Stroke placement in women’s professional tennis: What’s after the serve?","authors":"Philipp Born","doi":"10.30827/digibug.70281","DOIUrl":"https://doi.org/10.30827/digibug.70281","url":null,"abstract":"The aim of the present study was to investigate the placement of the return, and the 3rd and 4th strokes in professional women’s tennis, the possible differences related to the level of play and to derive practical recommendations from the results. In total this study contains an examination of 2562 returns, 2065 3rd strokes and 1606 4th strokes from 28 players in 19 professional women’s tennis matches (WTA & ITF 2018-2020 season). All strokes were classified using a specific court division method taking outcome (i.e., in, out, net) and placements into account for statistical analyses. Results show that returns are mainly placed into the court’s middle zones whereas 3rd strokes are placed more into offensive zone groups with 4th strokes similarly placed but more scattered. No correlation was found between the placement of the return and the 3rd stroke. Correlations were found between the placement of 4th stroke and the return, between the 4th and the 3rd stroke as well as between WTA and ITF players regarding all three strokes (return, 3rd stroke, 4th stroke). Present findings may be of interest to female tennis players and their coaches aiming to improve practice patterns in training and competitive performance in matches.","PeriodicalId":393687,"journal":{"name":"International Journal of Racket Sports Science","volume":"67 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113957299","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}