scholarly journals The Effectiveness of Virtual Reality on Anxiety and Performance in Female Soccer Players

Sports ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 167
Author(s):  
Kaitlyn Harrison ◽  
Emily Potts ◽  
Adam C. King ◽  
Robyn Braun-Trocchio
Keyword(s):  
Virtual Reality ◽  
Effect Size ◽  
Initial Step ◽  
Mental Effort ◽  
Soccer Players ◽  
Self Confidence ◽  
Use Of Technology ◽  
Moderate Effect Size ◽  
And Performance ◽  
Kendall’S W

With the increased use of technology, relaxation interventions are finding their way into technology devices like virtual reality head-mounted displays (VR HMDs). However, there is a lack of evidence on the efficacy of VR relaxation interventions to reduce anxiety in athletes and how that is portrayed in their movement patterns. The purpose of the current study was to examine how a VR relaxation intervention affected perceived anxiety levels and penalty kick performance of female soccer players. Thirteen female soccer players took five penalty kicks in baseline, stress-induced, and VR relaxation conditions. Perceived levels of anxiety, self-confidence, mental effort, heart rate (HR), accelerometry of the lumbar spine and thigh, and performance in each condition was obtained. Results indicated that the VR intervention significantly reduced cognitive anxiety and somatic anxiety from baseline (p = 0.002; p = 0.001) and stress (p < 0.001; p < 0.001) with large effect sizes (Kendall’s W = 0.72; 0.83). VR significantly increased self-confidence from baseline (p = 0.002) and stress (p = 0.001) with a large effect size (Kendall’s W = 0.71). Additionally, all participants felt that VR helped them relax. Mental effort was significantly higher in the stress condition compared to that in baseline (p = 0.007) with moderate effect size (Kendall’s W = 0.39). Peak acceleration and performance were not significantly influenced by stress or VR. This study serves as an initial step to evaluate VR relaxation interventions on performance in female soccer players.

scholarly journals Comparison of Official and Friendly Matches through Acceleration, Deceleration and Metabolic Power Measures: A Full-Season Study in Professional Soccer Players

2021 ◽  
Vol 18 (11) ◽  
pp. 5980
Author(s):  
Hadi Nobari ◽  
Sara Mahmoudzadeh Khalili ◽  
Rafael Oliveira ◽  
Alfonso Castillo-Rodríguez ◽  
Jorge Pérez-Gómez ◽  
...  
Keyword(s):  
Effect Size ◽  
Total Duration ◽  
Soccer Players ◽  
Metabolic Power ◽  
Professional Soccer ◽  
Premier League ◽  
Small Effect Size ◽  
Moderate Effect Size ◽  
High Effort

Soccer is a popular team sport and highly demanding activity that requires high effort and long-term training plans. The goals of this study were to compare the accelerations, decelerations and metabolic power between official and friendly full matches, between the first and second halves of the matches, and between both halves of official and friendly matches. Twelve professional soccer players (age, 28.6 ± 2.7 years; height, 182.1 ± 8.6 cm; body mass, 75.3 ± 8.2 kg; BMI, 22.6 ± 0.7 kg/m2) participated in this study. A total of 33 official and 10 friendly matches were analyzed from the Iranian Premier League. All matches were monitored using GPSPORTS systems Pty Ltd. The following variables were selected: total duration of the matches, metabolic power, accelerations Zone1 (<2 m·s−2) (AccZ1), accelerations Zone2 (2 to 4 m·s−2) (AccZ2), accelerations Zone3 (>4 m·s−2) (AccZ3), decelerations Zone1 (<−2 m·s−2) (DecZ1), decelerations Zone2 (−2 to −4 m·s−2) (DecZ2) and decelerations Zone3 (>−4 m·s−2) (DecZ3). The major finding was shown in metabolic power, where higher values occurred in friendly matches (p < 0.05 with small effect size). Furthermore, total duration, AccZ3, DecZ1, DecZ2, and DecZ3 were revealed to be higher in official matches, while AccZ1 and AccZ2 were higher in friendly matches. The second half of the official matches revealed higher values for total duration compared to friendly matches (p < 0.05, moderate effect size). In conclusion, this study observed higher values of metabolic power in friendly matches compared to official matches. AccZ3, DecZ1, DecZ2, and DecZ3 were higher in official matches, while AccZ1 and AccZ2 were higher in friendly matches.

Quiet Eye and Performance in Sport: A Meta-Analysis

2016 ◽  
Vol 38 (5) ◽  
pp. 441-457 ◽  
Author(s):  
Jean-Charles Lebeau ◽  
Sicong Liu ◽  
Camilo Sáenz-Moncaleano ◽  
Susana Sanduvete-Chaves ◽  
Salvador Chacón-Moscoso ◽  
...  
Keyword(s):  
Effect Size ◽  
Meta Analysis ◽  
Effect Sizes ◽  
Subsequent Performance ◽  
Quiet Eye ◽  
Performance Effects ◽  
Moderate Effect Size ◽  
Moderate Effect ◽  
And Performance ◽  
Absolute Duration

Research linking the “quiet eye” (QE) period to subsequent performance has not been systematically synthesized. In this paper we review the literature on the link between the two through nonintervention (Synthesis 1) and intervention (Synthesis 2) studies. In the first synthesis, 27 studies with 38 effect sizes resulted in a large mean effect (d = 1.04) reflecting differences between experts’ and novices’ QE periods, and a moderate effect size (d = 0.58) comparing QE periods for successful and unsuccessful performances within individuals. Studies reporting QE duration as a percentage of the total time revealed a larger mean effect size than studies reporting an absolute duration (in milliseconds). The second synthesis of 9 articles revealed very large effect sizes for both the quiet-eye period (d = 1.53) and performance (d = 0.84). QE also showed some ability to predict performance effects across studies.

Is Self-Confidence a Bias Factor in Higher-Order Catastrophe Models? An Exploratory Analysis

2004 ◽  
Vol 26 (3) ◽  
pp. 359-368 ◽  
Author(s):  
Lew Hardy ◽  
Tim Woodman ◽  
Stephen Carrington
Keyword(s):  
Effect Size ◽  
Interaction Effect ◽  
Model Framework ◽  
Somatic Anxiety ◽  
Catastrophe Model ◽  
Self Confidence ◽  
Cognitive Anxiety ◽  
Bias Factor ◽  
Median Split ◽  
And Performance

This paper examines Hardy’s (1990, 1996a) proposition that self-confidence might act as the bias factor in a butterfly catastrophe model of stress and performance. Male golfers (N = 8) participated in a golf tournament and reported their cognitive anxiety, somatic anxiety, and self-confidence prior to their tee shot on each hole. All anxiety, self-confidence, and performance scores were standardized within participants in order to control for individual differences. The data were then collapsed across participants and categorized into a high self-confidence condition and a low self-confidence condition by means of a median split. A series of two-way (Cognitive Anxiety × Somatic Anxiety) ANOVAs was conducted on each self-confidence condition in order to fag where the maximum Cognitive Anxiety × Somatic Anxiety interaction effect size lay along the somatic anxiety axis. These ANOVAs revealed that the maximum interaction effect size between cognitive and somatic anxiety was at a higher level of somatic anxiety for the high self-confidence condition than for the low self-confidence condition, thus supporting the moderating role of self-confidence in a catastrophe model framework.

scholarly journals Match Load of Soccer Players in Defensive Formation and Its Impact on the Level of Speed Abilities

2017 ◽  
Vol 57 (2) ◽  
pp. 134-145
Author(s):  
Miroslav Holienka ◽  
Michal Horný
Keyword(s):  
Effect Size ◽  
Soccer Players ◽  
Cross Sectional ◽  
Ex Post ◽  
Ex Post Facto ◽  
And Performance ◽  
Standing Start ◽  
The Impact

Abstract The aim of this study was to investigate the impact of the match load in soccer on the level of the selected speed abilities in the playing positions of the outside defender and central defender. Speed abilities in all their demonstrations are one of the most important fitness skills in today’s soccer. In our research, we assumed that the higher the match load players achieve, the greater the impact of this load on the level of the selected speed abilities would be. We carried out a cross-sectional ex post facto research. The monitored group consisted of the players of the team playing in the first league (Fortuna League). Their average age was 22.9 ± 4.5 years. We conducted the measurements in the preparation periods during pre-season matches. We carried out a total of 63 individual measurements. We measured the level of the match load and the performance in 10, 20 and 30 meter runs from a standing start before the match and after the match. Except of outside defenders in 30-meter run (W = 12; p = 0.02) we did not confirm a significant impact of the match load on the level of the selected speed (acceleration) abilities. Its effect size reached from d = 0.1 to d = 0.6. In addition, the correlations between match load and performance changes in all three tests were nonsignificant (p ≥ 0.5). Only 0.2 to 8.5 % of the variability in speed tests was shared with the level of match load.

Augmented Reality--Implications toward Virtual Reality, Human Perception and Performance

2012 ◽  
Author(s):  
R. A. Grier ◽  
H. Thiruvengada ◽  
S. R. Ellis ◽  
P. Havig ◽  
K. S. Hale ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Augmented Reality ◽  
Human Perception ◽  
And Performance

Physical Training-Basic Component in the Training of the Future Officers

2020 ◽  
Vol 26 (2) ◽  
pp. 305-308
Author(s):  
Fabiana Martinescu-Bădălan
Keyword(s):  
Physical Training ◽  
Mental Effort ◽  
Basic Component ◽  
Self Confidence ◽  
Development Of Resistance ◽  
Development Experience ◽  
The Future ◽  
The Military

AbstractThis work is designed to challenge the maintenance of the highest standards of physical training required to perform armed tasks. It is desired to accumulate a development experience that will culminate with the set upof very well-trained leaders. The training of the military is based on physical training. It ensures the possibility and availability of the military to cope with combat missions, obligations in the military environment, ensures the maintenance and development of resistance to intense physical and mental effort, and develops self-confidence and teamwork. The physical training considers the fulfillment of some general objectives and of some specific objectives, absolutely necessary in the conditions of carrying out the combat actions.

scholarly journals Eliminating the gap between the use of assistive technologies and the inclusion of people with intellectual disabilities in leisure activities

2021 ◽  
Vol 27 (2) ◽  
pp. 146045822110050
Author(s):  
Ioanna Dratsiou ◽  
Maria Metaxa ◽  
Evangelia Romanopoulou ◽  
Foteini Dolianiti ◽  
Dimitris Spachos ◽  
...  
Keyword(s):  
Intellectual Disabilities ◽  
Learning Experience ◽  
Leisure Activities ◽  
Assistive Technologies ◽  
Global Satisfaction ◽  
Constructive Learning ◽  
Formal Caregivers ◽  
Self Confidence ◽  
Ict Tools ◽  
And Performance

Information and Communication Technology (ICT) tools and Assistive Technologies (AT) can support people with Down Syndrome (PDS) and Intellectual Disabilities (PID) in increasing their self-confidence and independence, enhancing skills, and competences, participating in leisure activities. For families of PDS/PID, professionals, non-formal caregivers and volunteers, the challenge is to appreciate the benefits of ICT Tools in promoting inclusion. The aim of this study is to present the interdisciplinary and multidimensional scope of the DS Leisure project aiming at promoting the inclusion of PDS/PID through innovative ICT tools and their participation in inclusive leisure activities. Particularly, 24 individuals were asked to assess the global satisfaction and performance of PDS/PID, as well as the exploitation of ICT tools. Findings suggested that PDS/PID specific social, decision-making, and communication skills were significantly improved after their participation in the Experiential Activity and the e-Training platform was positively rated and considered a constructive learning experience.

scholarly journals Acute Effects of Different Postactivation Potentiation Protocols on Traditional Rowing Performance

2020 ◽  
Vol 18 (1) ◽  
pp. 80
Author(s):  
Alfonso Penichet-Tomas ◽  
Jose M. Jimenez-Olmedo ◽  
Luis Serra Torregrosa ◽  
Basilio Pueo
Keyword(s):  
Effect Size ◽  
Muscle Power ◽  
Average Power ◽  
Postactivation Potentiation ◽  
Warm Up ◽  
Maximal Load ◽  
Rowing Performance ◽  
Load Intensity ◽  
And Performance ◽  
Student’S T

Postactivation potentiation (PAP) describes an initial muscular activation with a submaximal or maximal load intensity that produces acute improvements in muscle power and performance in subsequent explosive activities. The objective of this study was to compare the effect of different PAP protocols in rowing performance. A crossover design involving seven rowers was used, in which two different PAP protocols were applied: PAP of maximal conditioning contractions (PAP MCC) on a rowing ergometer to provide greater transferability and, thus, enhance the magnitude of PAP stimuli on subsequent rowing performance; and PAP of maximal strength contractions (PAP MSC) in half squat and bench pull exercises, similar to the main exercises in rowing strength training, to perform a 20 s “all-out” test simulating a competition start. Student’s t-test was used to compare means of the variables (p < 0.05). Effect size statistics were calculated using Cohen’s d. The PAP MCC protocol resulted in significant differences, with an extremely large effect size in average power output (p = 0.034, d = 0.98) in the first 3 (p = 0.019, d = 1.15) and first 5 (p = 0.036, d = 0.91) strokes. This group also reached a greater number of strokes (p = 0.049, d = 2.29) and strokes per minute (p = 0.046, d = 1.15). PAP with maximal conditioning contractions in rowing warm-up enhanced subsequent rowing sprint and is an advisable strategy to potentiate performance at the start of rowing competitions and sprint regattas.

scholarly journals Comparative Analysis of Kinect-Based and Oculus-Based Gaze Region Estimation Methods in a Driving Simulator

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 26
Author(s):  
David González-Ortega ◽  
Francisco Javier Díaz-Pernas ◽  
Mario Martínez-Zarzuela ◽  
Míriam Antón-Rodríguez
Keyword(s):  
Virtual Reality ◽  
Comparative Analysis ◽  
Driving Simulator ◽  
Estimation Method ◽  
Estimation Methods ◽  
Gaze Estimation ◽  
Driving Simulators ◽  
Oculus Rift ◽  
Gaze Patterns ◽  
And Performance

Driver’s gaze information can be crucial in driving research because of its relation to driver attention. Particularly, the inclusion of gaze data in driving simulators broadens the scope of research studies as they can relate drivers’ gaze patterns to their features and performance. In this paper, we present two gaze region estimation modules integrated in a driving simulator. One uses the 3D Kinect device and another uses the virtual reality Oculus Rift device. The modules are able to detect the region, out of seven in which the driving scene was divided, where a driver is gazing at in every route processed frame. Four methods were implemented and compared for gaze estimation, which learn the relation between gaze displacement and head movement. Two are simpler and based on points that try to capture this relation and two are based on classifiers such as MLP and SVM. Experiments were carried out with 12 users that drove on the same scenario twice, each one with a different visualization display, first with a big screen and later with Oculus Rift. On the whole, Oculus Rift outperformed Kinect as the best hardware for gaze estimation. The Oculus-based gaze region estimation method with the highest performance achieved an accuracy of 97.94%. The information provided by the Oculus Rift module enriches the driving simulator data and makes it possible a multimodal driving performance analysis apart from the immersion and realism obtained with the virtual reality experience provided by Oculus.

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