scholarly journals A Multidisciplinary Investigation of the Effects of Competitive State Anxiety on Serve Kinematics in Table Tennis

2017 ◽  
Vol 55 (1) ◽  
pp. 83-95 ◽  
Author(s):  
Vuong Ngo ◽  
Hugh Richards ◽  
Miran Kondric
Keyword(s):  
Heart Rate ◽  
State Anxiety ◽  
High Speed ◽  
Self Report ◽  
National Standard ◽  
Table Tennis ◽  
High Anxiety ◽  
Tennis Players ◽  
To Receive ◽  
Anxiety Condition

AbstractDisplays 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. Automated motion capture systems consisting of high-speed 3D motion cameras and analytical software (QUALISYS) determined the subject’s movement kinematics: bat face angle (degrees) and serve routine duration (s). Self-reported state anxiety (MRF-Likert) and heart rate measurements were collected to examine changes between conditions. Contrary to the hypothesis, bat face angles did not change significantly between anxiety conditions (F (1.8) = 2.791, p = 0.133) and movement times were faster in the high-anxiety condition. In light of these findings, research into other facets of movement behaviour must be analysed to gain further understanding of the effects of anxiety on performance, which remain unclear.

Research on Face Recognition Sports Intelligence Training Platform Based on Artificial Intelligence

2021 ◽  
Vol 30 (06n08) ◽  
Author(s):  
Jie Yang ◽  
Lian Tang ◽  
Xin-Wei Li
Keyword(s):  
Artificial Intelligence ◽  
Heart Rate ◽  
Face Recognition ◽  
Control Unit ◽  
Training System ◽  
Table Tennis ◽  
Training Problem ◽  
Tennis Players ◽  
Industrial Control Computer ◽  
Human Behavior Recognition

With the application of artificial intelligence in many social fields, the research of human behavior recognition and non-contact detection of human physiological parameters based on face recognition and other technologies has developed rapidly, and the application of artificial intelligence in culture, sports and entertainment has also begun to rise. How to apply the existing mature technology to the sports intelligence training system taking table tennis as an example is a hot issue worthy of study. In this paper, a comprehensive intelligent table tennis training system and platform based on Convolutional Neural Network face recognition and face heart rate detection is designed, which is mainly used to solve the philosophical training problem in table tennis. In the system place, an identification cameras is set at the entrance of table tennis training places, which is used for table tennis players’ sign-in and training table number allocation, and an intelligent analysis cameras is set above each intelligent training table, which is used for detecting the face and heart rate of table tennis players. Each intelligent training platform consists of intelligent voice control unit, server, camera, industrial control computer, monitor and other terminal modules. The member data center constitutes the platform of intelligent table tennis training system.

The Effects of Anxiety on Motor Performance: A Test of the Conscious Processing Hypothesis

2005 ◽  
Vol 27 (2) ◽  
pp. 212-225 ◽  
Author(s):  
Richard Mullen ◽  
Lew Hardy ◽  
Andrew Tattersall
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Spectral Analysis ◽  
Motor Performance ◽  
Spectral Power ◽  
High Anxiety ◽  
Performance Effects ◽  
Conscious Processing ◽  
Task Irrelevant ◽  
Anxiety Condition

The aim of this study was to examine the conscious processing hypothesis as an explanation of the anxiety/performance relationship. The study was designed to identify conscious processing performance effects while controlling for an alternative attentional threshold explanation identified in previous research. Participants completed 60 golf putts. They completed 3 blocks of 10 putts in single task, task-relevant shadowing, and task-irrelevant tone-counting conditions. Each set of 3 × 10 putts was completed in low and high anxiety conditions. Anxiety was elevated using an instructional set. Self-reported effort and spectral analysis of heart rate variability were used to examine the patterning of effort across the different putting conditions. Findings indicated that performance was impaired in the high anxiety shadowing and tone-counting conditions, supporting an attentional threshold interpretation. Spectral analysis of heart rate variability indicated that potential compensatory increases in spectral power in the high frequency band associated with dual-task putting in the low anxiety condition were absent in the high anxiety tone-counting and shadowing putting conditions, partially reflecting the performance findings. No effects were found for self-reported effort. Taken together, the performance and heart rate variability results support an attentional interpretation of the anxiety/motor performance relationship.

Heart rate variability of young table tennis players with the use of the multiball training

2014 ◽  
Vol 10 (2) ◽  
pp. 25-35 ◽  
Author(s):  
MICHAIL KATSIKADELIS ◽  
◽  
THEOPHILOS PILIANIDIS ◽  
NIKOLAOS MANTZOURANIS ◽  
IOANNIS FATOUROS ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Table Tennis ◽  
Tennis Players

Studies and simulations on the flight trajectories of spinning table tennis ball via high-speed camera vision tracking system

2018 ◽  
Vol 233 (2) ◽  
pp. 210-226 ◽  
Author(s):  
Ping Wang ◽  
Qian Zhang ◽  
Yinli Jin ◽  
Feng Ru
Keyword(s):  
High Speed ◽  
Tracking System ◽  
Tennis Ball ◽  
Table Tennis ◽  
Flight Trajectory ◽  
Tennis Players ◽  
Simulated Trajectory ◽  
Ideal Tool ◽  
Ball Flight ◽  
Actual Trajectory

When a table tennis ball is hit by a racket, the ball spins and undergoes a complex trajectory in the air. In this article, a model of a spinning ball is proposed for simulating and predicting the ball flight trajectory including the topspin, backspin, rightward spin, leftward spin, and combined spin. The actual trajectory and rotational motion of a flying ball are captured by three high-speed cameras and then reconstructed using a modified vision tracking algorithm. For the purpose of model validation, the simulated trajectory is compared to the reconstructed trajectory, resulting in a deviation of only 2.42%. Such high modeling accuracy makes this proposed method an ideal tool for developing the virtual vision systems emulating the games that can be used to train table tennis players efficiently.

scholarly journals Towards an Understanding of Low-Income Individuals’ Financial Resiliency: Exploration of Risk Preferences, Personality Traits, and Savings Behavior

2021 ◽  
Vol 13 (5(J)) ◽  
pp. 32-54
Author(s):  
Carlos M. Parra ◽  
Ranjita Poudel ◽  
Matthew Sutherland
Keyword(s):  
Personality Traits ◽  
Low Income ◽  
State Anxiety ◽  
Risk Preferences ◽  
Real Life ◽  
Performance Measure ◽  
Self Report ◽  
Savings Behavior ◽  
Strategic Risk ◽  
To Receive

The Coronavirus disease 2019 (COVID-19) pandemic has helped expose and exacerbate individuals’ and households’ financial vulnerability worldwide. Meanwhile, behavioral elements affecting low-income populations’ ability to save and become more financially resilient have yet to receive sufficient academic attention. This exploratory study aims at the beginning to help elucidate the determinants of low-income individuals’ real-life savings behavior by utilizing laboratory performance measures (to characterize participants’ risk preferences by using the Balloon Analog Risk Task – BART, in study 1), as well as self-report surveys (to characterize participants’ personality traits, in study 2). Combining results from both studies, latent personality traits (i.e., attitude towards risk, perseverance, distractibility, and state anxiety) are found to affect the risk preferences of low-income individuals (captured using a novel BART performance measure indicative of an individual’s strategic risk preference adaptation), which in turn impact their ability to successfully complete matched savings programs and, thus, their ability to save and enhance their financial resilience.

Oxygen uptake and heart rate response of 6 standardized tennis drills

2012 ◽  
Vol 37 (5) ◽  
pp. 982-989 ◽  
Author(s):  
Nabyl Bekraoui ◽  
Marie-Agnès Fargeas-Gluck ◽  
Luc Léger
Keyword(s):  
Heart Rate ◽  
Oxygen Uptake ◽  
Energy Cost ◽  
High Speed ◽  
Heart Rate Response ◽  
Half Width ◽  
Full Width ◽  
Tennis Players ◽  
Low Speed ◽  
High Speeds

The purpose of this study was to compare the oxygen uptake of various on-court tennis drills. Eleven tennis players were monitored with a portable metabolic device to measure oxygen uptake of 6 different tennis drills at low and high speeds. The 6 drills were done with or without striking the ball, over half or full-width of the court, in attack or defense mode, using forehand or backhand strokes. Oxygen uptake values (mean ± SD) ranged from 33.8 ± 4.2 to 42.3 ± 5.1 mL·kg–1·min–1 when running at low speed on the full-width court in defense mode without striking the ball and when running at high speed on the full-width court in attack mode while striking the ball, respectively. Specific differences were observed. Attacking mode requires 6.5% more energy than defensive playing mode. Backhand strokes demand 7% more energy at low speed than forehand ones. Running and striking the ball costs 10% more energy than running without striking the ball. While striking the ball, shuttle running on half-width court costs 14% more energy than running on full-width courts. The specificity of the oxygen uptake responses obtained for these various tennis drills gives an improved representation of their energy cost and could be used to optimize training loads.

scholarly journals Correlations Between Stroke Structural Characteristics and Stroke Effect of Young Table Tennis Players

2020 ◽  
Author(s):  
Yi Xiao ◽  
Miaomiao Lu ◽  
Yuxuan Zeng ◽  
Yuanjie Xiao
Keyword(s):  
Angular Velocity ◽  
Knee Joint ◽  
High Speed ◽  
Wrist Joint ◽  
Structural Characteristics ◽  
Table Tennis ◽  
Ball Speed ◽  
Tennis Players ◽  
Spin Speed ◽  
The Right

Abstract Background: A perfect stroke is essential for winning table tennis competition. A perfect stroke is closely related to reasonable stroke structure, which directly affects the stroke effect. The main purpose of this study was to examine the correlations between the structural characteristics of stroke and the stroke effect. Methods: Forty-two young table tennis players were randomly selected from China Table Tennis College (M age = 14.21 ± 2.13; M height = 1.57 ± 0.14 m; M weight = 46.05 ± 6.52 kg, right-hand racket, shake-hands grip, no injuries in each joint of the body). The high-speed infrared motion capture system was used to collect the data of stroke structural characteristics, and the high-speed camera was used to measure the spin speed of the stroke. The influence of striking structural characteristics on striking effect was examined.Results: The time duration of backswing and forward motion were significantly correlated with ball speed (r = -0.403, p < 0.01; r = -0.390, p < 0.01, respectively) and spin speed (r = -0.244, p = 0.027; r = -0.369, p < 0.01, respectively). The linear velocity of right wrist joint was positively correlated with ball speed (r = 0.298, p < 0.01) and spin speed (r = 0.238, p = 0.031). The angular velocity of right elbow joint and right hip joint were positively correlated with ball speed (r = 0.219, p = 0.013; r = 0.427, p < 0.01, respectively) and spin speed (r = 0.172, p = 0.048; r = 0.277, p = 0.012, respectively). The angular velocity of right knee joint had a significantly negative correlation with placement (r = -0.246, p = 0.026). The angular velocity of right ankle joint had a significantly positive correlation with the ball speed (r = 0.443, p < 0.01).Conclusions: The time allocation of the three phases of backspin forehand stroke had an important impact on stroke effect, especially the ball speed and spin speed. The ball speed of the stroke was mainly affected by the translation of the right wrist joint. The spin speed of the stroke was mainly affected by the translation of the right wrist joint. The placement of the stroke was mainly affected by the rotation of the right knee joint.

scholarly journals Simulation of Virtual Reality and its Impact on Competitive State Anxiety and Level of Performance of Table Tennis Players

2015 ◽  
Vol 9 (2) ◽  
pp. 325
Author(s):  
Mervat Deeb ◽  
Tawfeeq Albakry
Keyword(s):  
Virtual Reality ◽  
Training Program ◽  
State Anxiety ◽  
Positive Impact ◽  
Sports Psychology ◽  
Table Tennis ◽  
Chi Square ◽  
Tennis Players ◽  
Chi Square Test ◽  
The Impact

This study aimed at exploring the impact of using a training program which employs simulation of virtual reality on competitive state anxiety; and the level of performance of the table tennis players in Jordan and Saudi Arabia. The sample consisted of 10 players (age 13–15 years); with five players purposefully selected from each country. The researchers administered the training program, using the immersive and nonimmersive virtual reality for 6 weeks 5 times a week. Competitive state anxiety inventory "CSAI-2" and a questionnaire for evaluating the performance in the "fore-hand drive" were used. The data were analyzed, using Mann–Whitney U test, Wilcoxon signed ranks test; and Chi square test. The results indicated that the program with simulation of virtual reality had a positive impact on the study parameters as the post measurement was significantly greater than the pre training measurement. In light of the results, the researchers recommended modern technological devices be used in sports psychology. Also, immersive simulation of virtual reality is recommended. 

Evaluations of the Psychometric Properties of the Recovery-Stress Questionnaire for Athletes among a Sample of Young French Table Tennis Players

2014 ◽  
Vol 114 (2) ◽  
pp. 326-340 ◽  
Author(s):  
Guillaume Martinent ◽  
Jean-Claude Decret ◽  
Edith Filaire ◽  
Sandrine Isoard-Gautheur ◽  
Claude Ferrand
Keyword(s):  
Factor Structure ◽  
Factor Model ◽  
Reliability And Validity ◽  
Self Report ◽  
Table Tennis ◽  
Recovery Stress ◽  
Factor Analyses ◽  
Confirmatory Factor Analyses ◽  
Tennis Players ◽  
Confirmatory Factor

This study used confirmatory factor analyses (CFAs) among a sample of young French table tennis players to test: (a) original 19-factor structure, (b) 14-factor structure recently suggested in literature, and (c) hierarchical factor structure of the Recovery-Stress Questionnaire for Athletes (RESTQ–Sport). 148 table tennis players completed the RESTQ–Sport and other self-report questionnaires between one to five occasions with a delay of 1 mo. between each completion. Results of CFAs showed: (a) evidence for relative superiority of the original model in comparison to an alternative model recently proposed in literature, (b) a good fit of the data for the 67-item 17-factor model of the RESTQ–Sport, and (c) an acceptable fit of the data for the hierarchical model of the RESTQ–Sport. Correlations between RESTQ–Sport subscales and burnout and motivation subscales also provided evidence for criterion-related validity of the RESTQ–Sport. This study provided support for reliability and validity of the RESTQ–Sport.

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