Volleyball Players Research Articles

An Early Warning Method for Volleyball Players with Human Bioelectric Energy

Bioelectric energy is a weak electric current generated by the human body itself, and the change in its value can indicate human injury, which can be used as a competitive physical injury judgment information. However, in the past, bioelectric energy measurement was mainly based on the standard voltage of 220 V, and it was not possible to conduct follow-up tests, so the scope of application was limited. Photovoltaic equipment in new energy has the characteristics of being easy to carry and can meet the needs of bioelectric energy testing at the theoretical level. In order to improve the application depth of new energy equipment and improve the safety of volleyball competition. Therefore, from the perspective of new energy, this paper tests the human bioelectric energy, collects current, voltage and power flow signals, combines the different functions to reduce the data dimensionality, calculates the abnormal changes of bioelectricity, and forms an abnormal data set. Finally, according to the injury characteristics of the human body, the volleyball economy is given an early warning. The results show that photovoltaic cells can meet the measurement requirements of human bioenergy, and the detection accuracy rate of joint injury, negative emotion, muscle strain and respiratory system injury reaches 80~83%, the abnormal electrical energy recognition rate reaches 90~95%, and the athlete satisfaction rate reaches 98%, and the wearing time is 1~3 months. Therefore, photovoltaic equipment can meet the identification requirements of human bioelectricity and has practical value in assisting competitive training and injury early warning.

The effects of circuit training versus high-intensity interval training on the endurance of volleyball athletes: a randomized controlled trial

Despite its intermittent nature, volleyball places significance on a high aerobic capacity, particularly evident in multiset games that demand sustained high-performance levels. Various training approaches exist to enhance the endurance of volleyball athletes. Thus, the fundamental aim of this research is to examine the contrasting effects of utilizing high-intensity interval training (HIIT) and circuit training methods to enhance volleyball athletes' endurance. The study used an Experimental group that partook in a HIIT training regime, and a Contrast group that undertook a Circuit training program. Thirty male volleyball players aged between 17 and 22 years (M=19.14; SD±1.61) were purposefully selected for the study and split into Contrast and Experimental groups of 15 each. At the beginning and end of the intervention programs both groups underwent physiological assessments for Maximum Oxygen Consumption (VO2max), Heart Rate Recovery (HRR), Peak Inspiratory Flow (PIF), Peak Expiratory Flow (PEF), and Force Vital Capacity (FVC). As result a meaningful Time x Group interaction for the VO2max, HRR, PIF, PEF and FVC was observed. This represents a significant improvement in the treatment group (p < 0.001). No material change was observed in the comparison group. Findings revealed that the HIIT training approach outperformed the circuit training method in enhancing volleyball athletes' endurance. Consequently, it is should be beneficial for volleyball players to incorporate HIIT into their standard training regimens. Keywords: VO2max; physiology; sport; exercise; aerobic capacity.

Comparative analysis of body composition indicators of volleyball players of different qualifications

Comparative analysis of body composition indicators of volleyball players of different qualifications

Knee-ankle kinematics and coupling responses to SportsMetrics training programs in females athletes with dynamic knee valgus: A sport-specific approach

ObjectivesThis study aimed to investigate the impact of SportsMetrics programs on knee and ankle kinematics, as well as knee-ankle coupling responses during double leg landings among female athletes with dynamic knee valgus (ligament dominance). MethodsEighty-four female athletes, including 30 volleyball players, 30 basketball players, and 24 soccer players, were randomly divided into two equal training (TG) and a control groups (CG). The TG underwent 18 sessions of SportsMetrics exercises, while the CG maintained their regular exercise routine. Dynamic knee valgus, lower limb kinematics, and coordination were assessed using the double leg squat and landing error scoring system tests. Main outcome measuresThe main outcome measures encompassed knee sagittal and frontal kinematics, ankle sagittal kinematics, as well as knee-ankle coordination and its variability. ResultsSignificant reduction in knee range of motion in the frontal plane was observed across all three sports during landing. The SportsMetrics program tailored for basketball players led to a specific increase in knee flexion. ConclusionThe implementation of SportsMetrics effectively modifies ACL injury risk factors, addressing dynamic knee valgus and landing techniques in female athletes. Female athletes displaying dynamic knee valgus are advised to incorporate sport-specific SportsMetrics programs into their training regimens for optimal results.

Psychosocial Adjustment Among Senior Volleyball Players in Libya

The research aimed to identify the level of psychosocial compatibility among senior volleyball players in Libya, and the research community consisted of (120) senior volleyball players distributed among (10) clubs, where the research was conducted by a comprehensive inventory method and the researcher used the Cooper-Smith scale (1978) and the Watkins scale (1978) to measure psychological compatibility, The reliability and Reliability of the study tool was verified using statistical methods represented by arithmetic means, standard deviations, percentages and inferential statistics to test the Reliability of the study tool (Pearson correlation coefficient, Cronbach's alpha) and in light of the research results a set of recommendations, including working on Training in the psychological field by collecting scientific information in psychology and social psychology and the necessity of having a psychologist in the teams in order to help them deal with various situations in their sports life and help players overcome the difficulties that may meet them that are consistent with their inclinations and desires.

Conservative interventions for female exercise-induced urinary incontinence: a systematic review.

To systematically review and synthesise what is known about the effectiveness of non-pharmaceutical conservative interventions for the management of urinary incontinence (UI) experienced by women during physical exercise. A systematic search was performed in the following databases in September 2023: the Medical Literature Analysis and Retrieval System Online (MEDLINE), Cumulative Index to Nursing and Allied Health Literature (CINAHL), Excerpta Medica dataBASE (EMBASE), Scientific Electronic Library Online (SciELO), Latin American and Caribbean Health Sciences Literature (LILACS), and Physiotherapy Evidence Database (PEDro). Studies were deemed eligible if population consisted of females who reported symptoms of UI while participating in physical exercise, and the interventions involved any non-pharmaceutical conservative treatment to manage symptoms during exercise. The primary outcome was severity of UI signs and symptoms. The protocol was registered in the International Prospective Register of Systematic Reviews (PROSPERO identifier: CRD42022379138). Of the 3429 abstracts screened, 19 studies were retained. Pelvic floor muscle training (PFMT) and intravaginal devices were the most commonly investigated modalities. Only two randomised controlled trials (RCTs), both among volleyball players, compared PFMT with no PFM exercise, showing a reduction in pad weight gain after the intervention in the experimental groups only. PFMT with and without biofeedback randomised among soldiers demonstrated a reduction in the frequency of urine leakage episodes in both groups, while supervised and unsupervised PFMT randomised among athletes from different sports showed pad weight gain reduction in the supervised group only. Seven single-arm studies suggested that PFMT alone or combined with other modalities may reduce UI severity in active women based on questionnaires, bladder diaries, and self-reported symptoms. A single-arm and a crossover study found pessary use beneficial in reducing urine leakage based on questionnaires and pad weight gain, respectively. When comparing pessary, tampon, and no intervention, two repeated-measures studies found tampons may reduce leakage more than pessaries in CrossFit exercisers and women performing aerobic exercises. A vaginal sponge also reduced pad weight gain during aerobic exercises. Other modalities (i.e., an intraurethral device, photobiomodulation, and combined therapies) were investigated using case series or single case studies. While all interventions showed some evidence of effectiveness, the results must be interpreted with caution due to methodological limitations and high risk of bias. In particular, despite a high reliance on pad tests as a primary outcome, we identified inconsistencies in how pad tests were administered and interpreted. Only the effectiveness of PFMT to reduce urine leakage during exercise has been evaluated through RCTs, with some evidence of effectiveness. We identified a clear need for higher quality studies, with better reporting on the interventions, and more judicious use and interpretation of outcome measures.

The Validation of the Defensive Reactive Agility Test in Top-Level Volleyball Male Players: A New Approach to Evaluating Slide Speed Using Witty SEM

Aim: The aim of the study is to provide a new tool to measure the level of defensive agility objectively. Methods: The sample included 14 elite male volleyball players of the University of Nitra club (22.3 ± 5.7 years). Measurements consisted of body height (BH); body weight (BM); body mass index (BMI), and the defensive agility test (DRAT (test-retest)) with an interval of one week between the two tests using an electronic timer (Witty photocell) and Witty SEM lights (Microgate, ITA). The validation included assessing the equality of mean values in the test and retest (t-Student), effect sizes with Cohen’s d, analysis of variance (ANOVA), intraclass correlation coefficient determinations (ICC model), and random intercept correlation (Φ). Results: The results indicated no significant differences in both tests except for left movement (p = 0.0255). The ICC value of the test time was statistically significant (0.91); standard error of measurement (SEM = 0.02); repeatability coefficient (RC = 0.20); minimal difference (MD = 0.04). Effect sizes were trivial to small (d = ˂−0.05–0.17>; right), medium (d = 0.35; backward) a large (d = −0.67; left). Conclusions: The DRAT test showed excellent reliability in total time (ICC = 0.91). Validation of the DRAT test’s consistency, reliability, accuracy and validity can help coaches make decisions about evaluating and monitoring defensive reactive agility performance in sports games.

Physiological and performance adaptations to beta alanine supplementation and short sprint interval training in volleyball players

This study aimed to elucidate the impact of combining Beta-Alanine (BA) supplementation with short sprint interval training on cardiorespiratory fitness, anaerobic power, and bio-motor abilities in volleyball players. Twenty young male athletes were randomly divided into 2 equal groups and performed 8 weeks of short sprint interval training while supplementing 4.8 g daily BA or placebo (polydextrose). The players were evaluated for volleyball-specific bio-motor abilities (vertical jump, horizontal jump, spike jump, block jump, 10-m linear sprint, and T-test change of direction speed) and physiological parameters (cardiorespiratory fitness and anaerobic power) pre- and post-intervention. Both groups demonstrated significant (p ≤ 0.05) improvements in all measured variables over time. A time-regimen interaction was observed in jumping ability enhancement from pre- to post-training, wherein BA elicited more significant changes in both vertical and horizontal jumps compared to the placebo. Analyzing residuals in changes and the coefficient of variations (CV) in mean group changes demonstrated that BA supplementation results in uniformly inducing adaptive changes among individuals. Therefore, in light of these results, it is recommended that coaches and trainers take into consideration the utilization of BA as an ergogenic aid to enhance the vertical and horizontal jumps of volleyball players and increase the homogeneity in adaptive responses over the training period.

Effects of the stretching program in male volleyball players with posterior shoulder tightness

BackgroundStretching programs are often used to improve muscle stiffness and thereby posterior shoulder tightness (PST); however, knowledge about their effects on the viscoelastic properties of muscles and performance is limited. ObjectiveThe aim of this study was to investigate the effects of a six-week stretching program on the viscoelastic properties of posterior shoulder muscles, shoulder functional performance and range of motion in volleyball players with PST. Study designA Randomized Controlled Trial. Level of evidenceLevel II. MethodsThe study was conducted in 34 male (aged 19–26) professional volleyball players with PST. They were randomly assigned to stretching and control groups. A stretching routine (combining sleeper stretch and cross body stretch exercises) was performed in the stretching group for six weeks. Measurements were taken during the first assessment and six weeks after the initiation of stretching for the following: shoulder external/internal rotation range of motion, spike velocity, single arm seated shot-put test, and infraspinatus– posterior deltoid muscle stiffness (by shear wave elastography). ResultsWhile the stretching group had statistically better results regarding increased shoulder internal rotation (p < 0.01), spike velocity (p = 0.02) and seated single arm shot put distance (p < 0.01), stretching did not have any effect on tissue stiffness. ConclusionsA 6-week program of sleeper stretch, and cross body stretch exercises improved shoulder internal rotation and functional performance. A clinically meaningful change in muscle mechanical properties cannot be detected after a 6-week stretching program.

Endurance training and physiological variables: effects on sub-elite volleyball players

Volleyball is perceived as a physically demanding sport that involves rapid changes in speed, deceleration, and abrupt alterations in movement direction. It has been emphasized that physiological attributes such as VO2max, PIF, PEF, and FVC play a crucial role in the athletic performance of individuals participating in dynamic sports, aiding them in effectively managing critical situations. Hence, the aim of this research was to evaluate the impact of endurance training on physiological parameters among volleyball athletes. A randomized controlled trial was carried out with 24 male players (mean age 21,58; SD±2,46 years). The assessment of physiological characteristics involved the utilization of a dry spirometer for VO2max measurement and the Multistage Fitness Test for assessing PIF, PEF, and FVC. A two-way Anova analysis was executed to ascertain any disparities in physiological parameters from pre-test to post-test. The results indicated notable variances in physiological traits (VO2max, PIF, PEF, and FVC) among volleyball participants following the implementation of the Tabata intervention regimen. These metrics are instrumental in enhancing physiological capabilities to attain superior athletic performances. When designing training regimens, it is imperative to consider physiological functional elements aligned with the specific demands of the sport. Key words. VO2max; physiology; sport; exercise; Tabata training.

The Effects of Mental Fatigue on Anaerobic Power and Power Endurance Performance.

Mental fatigue has been studied extensively in relation to its impact on aerobic-, strength-, and motor-based tasks, but anaerobic power-based tasks have received limited attention. Interdisciplinary research investigating the underlying mechanisms by which mental fatigue influences physical performance has been called for. In two studies, the effects of mental fatigue on maximal power jump and endurance jump performance as well as kinetics and kinematics during jump performance were examined. Samples of collegiate volleyball players (Study 1; N = 14) and recreationally active students (Study 2; N = 27) completed two 30 min experimental manipulations (high vs. low cognitive control exertion) before performing three maximal power squat jumps followed by 15 repeated countermovement jumps, with measurements of kinetics and kinematics. For Study 1, the maximal power performance was significantly lower under a mentally fatigued condition, but no differences were observed for repeated jump performance, which may have been attributable to alterations in jump mechanics. For Study 2, no between-condition differences were observed for the maximal power performance, although repeated jump performance was significantly lower under a mentally fatigued condition. Collectively, these findings suggest that the impacts of mental fatigue on power-based performance tasks may depend on the task demands as well as the training status of the individual.

Wobble Board Performance: A Practical and Useful Quantification in Balance Assessment

Balance is integral in ankle injury prevention and therapy, especially in high-risk sports like volleyball. For balance assessment, the recommended wobble board (WB) performance (i.e., time at equilibrium) has never been compared with the gold standard. The objective was to investigate the relationships of force-plate-derived center of pressure (CoP) with WB performance and the accuracy of WB-derived CoP estimates. Twelve high-level volleyball players completed six unipedal standing trials on a computerized WB. WB tilt angles and CoP were obtained simultaneously via tri-axis accelerometers on the WB (200 Hz) and a force plate (1000 Hz), respectively. WB performance, polynomial-transformed CoP estimates, and CoP fractal sway, sway area, and mean sway velocity were assessed via Pearson and concordance correlation, root mean square errors, and dependent t-tests. WB performance was related with CoP sway and sway area (|rlinear| = 0.714–0.842, |rnonlinear| = 0.833–0.910, p &lt; 0.01). The strongest concordance (0.878–0.893, p &lt; 0.001) and smallest errors (6.5–10.7%) were reported for anterior–posterior sway and sway area. Moderate to excellent relationships between the WB performance and force plate CoP variables supported the usefulness of WB performance and estimates (especially sway area) in balance assessment. Furthermore, this study presents recommendations for future analyses and modeling approaches to reflect the complexity of postural control.

Dietary Supplementation Strategies for Improving Training Adaptations, Antioxidant Status and Performance of Volleyball Players: A Systematic Review

Dietary Supplementation Strategies for Improving Training Adaptations, Antioxidant Status and Performance of Volleyball Players: A Systematic Review

Study of Yoga Intervention on Volleyball Players in West Bengal

Study of Yoga Intervention on Volleyball Players in West Bengal

Analysis of response time and type of stimulus in school volleyball and futsal players of both sexes

Analysis of response time and type of stimulus in school volleyball and futsal players of both sexes

The Comparing the efficiency of professional behavior as a determinant of effectiveness among coaches from the point of view of female volleyball and basketball players for some clubs in Iraq.

The research aims to know the levels of professional behavior as a determinant of the effectiveness of coaches in volleyball and basketball for some clubs in Iraq at the ages of 14-18 years, and to know the differences in the levels of professional behavior as a determinant of the effectiveness of coaches in volleyball and basketball for some clubs in Iraq at the ages of 14-18 years. The researcher used the descriptive approach in my survey style and the causal comparison of the nature of the research. Female players for some clubs in Iraq were identified for the two volleyball games, which numbered (11) teams, with (154) players, and basketball, which amounted to (6) teams, with (84) players. The research sample amounted to (230) female players did this after excluding (8) female players from the two games for the purpose of the reconnaissance experiment The researcher used a number of means to collect information, and a scale was determined to measure professional behavior, conduct the exploratory experiment, find the scientific bases for the scale, and then conduct the main experiment, and in order to process the data, the researcher used the electronic statistical bag (spss) and reached the following conclusions that the volleyball and basketball coaches for the included clubs In the research, they enjoy acceptable professional behavior from the point of view of the female players. The levels of coaches for the two games are distributed between very good and very weak, and most of the sample was concentrated at the average level. There was no significant difference between the coaches of volleyball and basketball from the point of view of male players.

Study on the Weight of Jumping Exercises in the Development of Explosive Force in Volleyball Players

We highlighted aspects related to the different ways of using jumps to achieve goals aimed at developing explosive force in female volleyball players. We administered a questionnaire to 64 volleyball players registered with different teams in the Romanian championship to determine their opinions regarding the importance of jumping exercises in the development of explosive strength in volleyball players. The data presented in the research results highlight the fact that some types of jumps are used in a greater proportion in the parts of training intended for the development of explosive force, compared with other types of jumps. Referring to the type of strength pursued as a training goal, we found that the weight of the use of jumps is different, with a significant increase in their use in the parts of training aimed at speed strength/explosive strength.

The Effects of Neuromuscular Training in the Maintenance of Fitness in Volleyball Players During the Junior Period

The paper wants to present the importance of performing neuromuscular training in order to permanently maintain a form of high fitness throughout the competitive period. The aim of this work was to verify the effects of training on neuromotor variables in young volleyball athletes at different times of the program. The hypothesis of the study starts from the fact that further investigation together with the realization and application of a training program, will contribute to the achievement of training fitness during competitive periods. The outcomes of implementing this training regimen with young female volleyball players underscore the suitability of engaging in competition during their initial phase.

Methodical Contributions Regarding the Improvement of Physical Training in U16 Female Volleyball Players

Physical training in volleyball, with a focus on juniors, raises the development of new training methods as a very important issue, meant to expand the body's functional possibilities. The game of volleyball has a team character, a trait that entails the need for collective effort, aimed at achieving the goal - victory. The victory of the team can only be achieved if the ratios between the motor qualities, the height of the players, and the overall effectiveness of the team are optimized in the two fundamental phases: attack and defense. A selection of the means applied in physical training must be made in accordance with the technical needs imposed by the sports branch, in order that the muscle groups involved in the achievement of specific movements to be well prepared, and the technical-tactical actions can be performed at their maximum potential.

Comparison of Biomotor Fitness Variables between Basketball and Volleyball Players in Ignatius Ajuru University of Education

Background: The purpose of this study is to compare the biomotor fitness variables between basketball and volleyball players in Ignatius Ajuru University of Education. This study adopted an ex post facto research design. Methodology: The population for this were all volleyball and basketball players, from which a sample size of 10 participants from each team were selected. To test for balance, a stork stand test was carried out, vertical jump test was used to test for power, an Illinois Agility Test (IAT) was used to test for agility, a 30m sprint/dash was used to assess the speed of the participants, and timed push-up test for muscular endurance. Statistical Package for Social Sciences (SPSS) version 25 was used for data analysis. Results &amp; Discussion: The findings revealed a 0.13 percent difference in power which was no statistically significant difference (p&gt;.05, p=0.987). There was 30.8 percent in balance which was statistically significant (p&lt;05, p=0.037). A 1.4 percent difference in agility was not deemed statistically significant (p&gt;.05, p=0.827). Volleyball players' performed 13.1% better in muscle endurance test, though not considered statistically significant (p&gt;.05, p=0.142). Conclusion &amp; Recommendation: Based on the findings from the study, it was evident that biomotor fitness variables among volleyball and basketball players in Ignatius Ajuru University of Education was virtually the same as the players demonstrated no significant difference in most biomotor variables such as speed, agility, power and muscular endurance. While being a jack of all trade (sports) makes one better than a master of none, in sports there is need for proper focus on a specific sports niche. Thus, coaches and trainers of volleyball and basketball players should help both category of players concentrate their efforts on a specific sport so as to achieve maximum biomotor fitness required for maximal performance in a specific sport.