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Journal of Human Kinetics

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https://www.readbyqxmd.com/read/28210349/a-comparison-of-serve-speed-and-motor-coordination-between-elite-and-club-level-tennis-players
#1
Mustafa Söğüt
The purpose of this study was to compare the serve speed and motor coordination of elite and club level junior tennis players aged 11-14 years. Participants (n=35) were assigned to one of the two groups according to their experience, weekly training volume and competition level. Serve speed was assessed with a sports radar gun. Motor coordination was evaluated by means of the Körperkoordinationstest für Kinder. The main results revealed that serve speed and motor coordination performance levels of the elite group were significantly higher than those of the club group...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28210348/game-performance-and-length-of-rally-in-professional-padel-players
#2
Javier Courel-Ibáñez, Bernardino Javier Sánchez-Alcaraz Martínez, Jerónimo Cañas
The purpose of this study was to analyse differences in rally length considering attack effectiveness, a players' location and a game outcome in professional padel players. A total of 1527 rallies from 10 male matches of the 2013 Masters Finals of the World Padel Tour were registered through systematic observation. Data treatment included non-parametric mean comparisons (Mann-Withney and Kruskal-Wallis tests), and association analyses (crosstabs and Chi square analysis). In overall, 40% of unforced errors were made within the first 4 s of the rally, over 50% of points were scored between the 5th and 11th s, and 30% of forced errors occurred after the 11th -s of the rally...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28210347/assessing-cognitive-performance-in-badminton-players-a-reproducibility-and-validity-study
#3
Tanja van de Water, Barbara Huijgen, Irene Faber, Marije Elferink-Gemser
Fast reaction and good inhibitory control are associated with elite sports performance. To evaluate the reproducibility and validity of a newly developed Badminton Reaction Inhibition Test (BRIT), fifteen elite (25 ± 4 years) and nine non-elite (24 ± 4 years) Dutch male badminton players participated in the study. The BRIT measured four components: domain-general reaction time, badminton-specific reaction time, domain-general inhibitory control and badminton-specific inhibitory control. Five participants were retested within three weeks on the badminton-specific components...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28210346/mental-toughness-in-talented-youth-tennis-players-a-comparison-between-on-court-observations-and-a-self-reported-measure
#4
Ruben Houwer, Tamara Kramer, Ruud den Hartigh, Nikki Kolman, Marije Elferink-Gemser, Barbara Huijgen
In tennis, mental toughness is often considered highly important in achieving the elite level. The current study is the first to examine behavioural expressions of mental toughness on the court and their relationships with self-reported measures. Based on the input of five experienced tennis coaches of junior tennis players and behaviours used in previous studies, we developed a taxonomy consisting of six positive behaviours and ten negative ones. To investigate the relationship between these on-court behaviours of mental toughness and how the players rated their own mental toughness, emotional control in particular, six talented tennis players (aged 10-13) were recorded during tennis matches and filled out the self-reported measure of mental toughness (MTQ48)...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28210345/the-dutch-technical-tactical-tennis-test-d4t-for-talent-identification-and-development-psychometric-characteristics
#5
Nikki Kolman, Barbara Huijgen, Tamara Kramer, Marije Elferink-Gemser, Chris Visscher
This study examined the test-retest reliability, validity and feasibility of the newly developed Dutch Technical-Tactical Tennis Test (D4T). This new test is relevant for talent identification and development in tennis. Thirty-two youth male tennis players (age 13.4 ± 0.5) were classified as elite (n = 15) or sub-elite (n = 17) according to their position on the national youth ranking list under 15 years (cut-off rank 50) in the Netherlands. Games, rallies and different tactical situations (i.e. offensive, neutral and defensive) were simulated with a ball machine...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28210344/differences-in-movement-speed-before-and-after-a-split-step-between-professional-and-junior-tennis-players
#6
Aleš Filipčič, Bojan Leskošek, Goran Munivrana, Gabriela Ochiana, Tjaša Filipčič
This study investigated tennis players' speed before, during and after the split-step, deceleration before and acceleration after the split-step in four different stroke groups in three age categories. Seven male professional, eleven male and ten female junior tennis players were recorded with video cameras at official tournaments. Using the SAGIT system, we gathered data on 8,545 split-steps. Tennis players performed a split-step in 82.9% of cases. A tennis player's speed, deceleration and acceleration were measured 0...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28210343/reliability-and-factorial-validity-of-non-specific-and-tennis-specific-pre-planned-agility-tests-preliminary-analysis
#7
Damir Sekulic, Ognjen Uljevic, Mia Peric, Miodrag Spasic, Miran Kondric
Agility is an important quality in tennis, yet there is an evident lack of studies focussing on the applicability of tennis-specific agility performances and comparing them to equivalent non-specific agility performances. The aim of this study was to evaluate the reliability and factorial validity of three tests of pre-planned agility, performed in specific (with a tennis racquet) and non-specific (without a tennis racquet) conditions. The sample consisted of 33 tennis players (13 males and 20 females; age: 18...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28210342/split-step-timing-of-professional-and-junior-tennis-players
#8
Ales Filipcic, Bojan Leskosek, Tjasa Filipcic
The purpose of the study was to determine the timing of a split-step in three categories of tennis players in four groups of strokes. Subjects were divided into three groups: male and female junior, and male professional tennis players. During two tournaments, all matches were recorded with two fixed video cameras. For every stroke, the timing of the split-step between the opponent's impact point when hitting the ball and the player's split-step was measured. A two-way analysis of variance (ANOVA) was used to determine the differences between groups of strokes, players and the interaction Player x Stroke Group...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28210341/a-multidisciplinary-investigation-of-the-effects-of-competitive-state-anxiety-on-serve-kinematics-in-table-tennis
#9
Vuong Ngo, Hugh Richards, Miran Kondric
Displays of anxiety in table tennis were assessed through subjective (a self-report questionnaire), physiological (heart-rate variability) and kinematic variables. Using a within-group crossover design, 9 university-level table tennis players completed a series of serves under low- and high-anxiety conditions. Anxiety manipulation was achieved through the introduction of a national standard table tennis player, known to the participants, to receive serves in the high-anxiety condition, whilst serves were received by no opponent in the low-anxiety condition...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28210340/the-relationship-between-stress-and-coping-in-table-tennis
#10
Dora Kurimay, Alison Pope-Rhodius, Miran Kondric
The aim of this study was to examine the relationship between cognitive competitive anxiety intensity and coping strategies in table tennis players. One hundred and two (102) US competitive table tennis players of age range from 10 to 60 filled out a Revised Competitive State Anxiety Inventory-2 (CSAI-2R, Cox et al., 2003) at least 30 minutes before the start of their tournament match and a Modified Cope questionnaire (MCOPE; Crocker and Graham, 1995) 15 minutes after they finished their match. Our study found significant differences between low and high cognitive competitive anxiety groups with regard to the use of coping strategies...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28210339/anger-management-evaluation-of-a-cognitive-behavioral-training-program-for-table-tennis-players
#11
Georges Steffgen
Based on a systematic review of the literature on anger and anger management in sport, there is evidence that anger might be dysfunctional, especially in sports requiring selective attention and fine-tuned motor skills. The research literature suggests that cognitive-behavioral intervention programs can be fruitful in helping athletes to understand and control dysfunctional anger. Therefore, the main goal of the present study was to evaluate the effectiveness of a brief training program for table tennis players in cognitive-behavioral anger management that aimed at changing their noneffective anger reactions...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28210338/influence-of-game-evolution-and-the-phase-of-competition-on-temporal-game-structure-in-high-level-table-tennis-tournaments
#12
Jorge Vieira de Mello Leite, Fabio Augusto Barbieri, Willian Miyagi, Elvis de Souza Malta, Alessandro Moura Zagatto
The aims of this study were: a) to investigate the game temporal structure in high-level table tennis competitions; b) to verify the influence of game evolution in international competitions from 2009 to 2012 (World Table Tennis Championships and the Olympic Games) on game temporal structure; c) to compare game temporal structure according to the phase of competition. Comparisons between the three international tournaments demonstrated that rally duration decreased significantly (p < 0.05) during the analyzed period (2009-2012), while the rest time increased (p < 0...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28210337/extraction-of-knowledge-from-the-topographic-attentive-mapping-network-and-its-application-in-skill-analysis-of-table-tennis
#13
Isao Hayashi, Masanori Fujii, Toshiyuki Maeda, Jasmin Leveille, Tokio Tasaka
The Topographic Attentive Mapping (TAM) network is a biologically-inspired classifier that bears similarities to the human visual system. In case of wrong classification during training, an attentional top-down signal modulates synaptic weights in intermediate layers to reduce the difference between the desired output and the classifier's output. When used in a TAM network, the proposed pruning algorithm improves classification accuracy and allows extracting knowledge as represented by the network structure...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28210336/effect-of-changing-table-tennis-ball-material-from-celluloid-to-plastic-on-the-post-collision-ball-trajectory
#14
Yuki Inaba, Sho Tamaki, Haruhiko Ikebukuro, Koshi Yamada, Hiroki Ozaki, Kazuto Yoshida
The official material used in table tennis balls was changed from celluloid to plastic, a material free of celluloid, in 2014. The purpose of this study was to understand the differences and similarities in the two types of ball materials by comparing their behavior upon collision with a table. The behavior of the balls before and after collision with a table, at various initial speeds ranging from 15 to 115 km/h, was captured using high-speed cameras. Velocities and spin rates before collision and velocities after collision were computed to calculate the coefficients of restitution and friction...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28210335/training-level-does-not-affect-auditory-perception-of-the-magnitude-of-ball-spin-in-table-tennis
#15
Daniel P R Santos, Roberto N Barbosa, Luiz H P Vieira, Paulo R P Santiago, Alessandro M Zagatto, Matheus M Gomes
Identifying the trajectory and spin of the ball with speed and accuracy is critical for good performance in table tennis. The aim of this study was to analyze the ability of table tennis players presenting different levels of training/experience to identify the magnitude of the ball spin from the sound produced when the racket hit the ball. Four types of "forehand" contact sounds were collected in the laboratory, defined as: Fast Spin (spinning ball forward at 140 r/s); Medium Spin (105 r/s); Slow Spin (84 r/s); and Flat Hit (less than 60 r/s)...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28210334/a-shot-number-based-approach-to-performance-analysis-in-table-tennis
#16
Sho Tamaki, Kazuto Yoshida, Koshi Yamada
The current study proposes a novel approach that improves the conventional performance analysis in table tennis by introducing the concept of frequency, or the number of shots, of each shot number. The improvements over the conventional method are as follows: better accuracy of the evaluation of skills and tactics of players, additional insights into scoring and returning skills and ease of understanding the results with a single criterion. The performance analysis of matches played at the 2012 Summer Olympics in London was conducted using the proposed method...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28210333/the-fastest-ball-games-from-the-viewpoint-of-science
#17
Miran Kondrič
No abstract text is available yet for this article.
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28149429/physiological-nutritional-and-performance-profiles-of-brazilian-jiu-jitsu-athletes
#18
Leonardo V Andreato, Jonatas Fs Santos, João Vdc Esteves, Valeria Lg Panissa, Ursula F Julio, Emerson Franchini
This study analysed the physiological, nutritional and performance profiles of athletes practicing Brazilian jiu-jitsu. To this end, 15 athletes that practiced Brazilian jiu-jitsu (aged: 28 ± 5 years; 8 brown belts and 7 black belts; training experience: 11 ± 4 years) underwent anthropometric measurements (body composition and somatotype), dietary evaluation (24 h recall) and physical fitness tests (movement time, dynamometer handgrip, kimono grip strength, vertical jump and sit-and-reach tests). The athletes had 12...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28149428/analysis-of-tests-evaluating-sport-climbers-strength-and-isometric-endurance
#19
Mariusz Ozimek, Robert Staszkiewicz, Robert Rokowski, Arkadiusz Stanula
The present study was designed to determine which types of specific tests provide an effective evaluation of strength and endurance in highly trained competitive sport climbers. The research process consisted of three basic components: the measurement of selected somatic characteristics of the climbers, the assessment of their physical conditioning, and a search for correlations between the anthropometric and "conditioning" variables on the one hand, and climber's performance on the other. The sample of subjects consisted of 14 experienced volunteer climbers capable of handling 7a- 8a+/b on-sight rock climbing grades...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28149427/effects-of-plyometric-training-on-physical-fitness-in-team-sport-athletes-a-systematic-review
#20
Maamer Slimani, Karim Chamari, Bianca Miarka, Fabricio B Del Vecchio, Foued Chéour
Plyometric training (PT) is a very popular form of physical conditioning of healthy individuals that has been extensively studied over the last decades. In this article, we critically review the available literature related to PT and its effects on physical fitness in team sport athletes. We also considered studies that combined PT with other popular training modalities (e.g. strength/sprint training). Generally, short-term PT (i.e. 2-3 sessions a week for 4-16 weeks) improves jump height, sprint and agility performances in team sport players...
December 1, 2016: Journal of Human Kinetics
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