Factors Correlated with Volleyball Spike Velocity

2005 ◽  
Vol 33 (10) ◽  
pp. 1513-1519 ◽  
Author(s):  
Bénédicte Forthomme ◽  
Jean-Louis Croisier ◽  
Guido Ciccarone ◽  
Jean-Michel Crielaard ◽  
Marc Cloes
Keyword(s):  
Strength Performance ◽  
Specific Strength ◽  
Volleyball Players ◽  
Ball Velocity ◽  
Elbow Flexors And Extensors ◽  
Positive Correlations ◽  
High Level ◽  
Physical Features ◽  
The Relationship ◽  
External Rotator

Background Spike effectiveness represents a determining element in volleyball. To compete at a high level, the player must, in particular, produce a spike characterized by a high ball velocity. Hypothesis Some muscular and physical features could influence ball velocity during the volleyball spike. Study Design Descriptive laboratory study. Methods A total of 19 male volleyball players from the 2 highest Belgian national divisions underwent an isokinetic assessment of the dominant shoulder and elbow. Ball velocity performance (radar gun) during a spike test, morphological feature, and jump capacity (ergo jump) of the player were measured. We tested the relationship between the isokinetic parameters or physical features and field performances represented by spike velocity. We also compared first-division and second-division player data. Results Spike velocity correlated significantly with strength performance of the dominant shoulder (internal rotators) and of the dominant elbow (flexors and extensors) in the concentric mode. Negative correlations were established with the concentric external rotator on internal rotator ratio at 400 deg/s and with the mixed ratio (external rotator at 60 deg/s in the eccentric mode on internal rotator at 240 deg/s in the concentric mode). Positive correlations appeared with both the volleyball players’ jump capacity and body mass index. First-division players differed from second-division players by higher ball velocity and increased jump capacity. Conclusion Some specific strength and physical characteristics correlated significantly with spike performance in high-level volleyball practice. Clinical Relevance Our results could provide useful information for training management and propose some reflections on injury prevention.

scholarly journals Predictors of Attack Performance in High-Level Male Volleyball Players

2018 ◽  
Vol 13 (9) ◽  
pp. 1230-1236 ◽  
Author(s):  
Dimitrios Challoumas ◽  
Andreas Artemiou
Keyword(s):  
Vertical Jump ◽  
Volleyball Players ◽  
Negative Effect ◽  
History Of ◽  
History Of Pain ◽  
Positive Correlations ◽  
High Level ◽  
Relationship Of ◽  
The Relationship ◽  
Body Bone

Purpose: In volleyball, teams win the majority of points through attacks (spikes), and therefore attack effectiveness (AE) is one of the most important predictors of victory. Traditionally, greater vertical jump heights (VJH) and higher spike speeds (SS) have been thought to increase AE; however, relevant research is limited. The authors’ aim was to assess the relationship of VJH and SS with AE, as well as identifying possible associations of demographic and anthropometric factors, including common volleyball injuries, with VJH, SS, and AE. Methods: A total of 22 male volleyball players from 2 teams in the top division of the Cypriot championship were included in the study. VJH was measured with the jump-and-reach test, SS was tested with a sports speed radar, and AE was calculated from performance reports of 4 matches between the 2 teams. Results: Statistically significant results included positive correlations between VJH and SS, percentage lean mass and SS, body-bone percentage and SS, frequency of volleyball practice and SS, and frequency of resistance training and SS. AE was found to increase with increasing age, while SS over 90 km·h−1 appeared to have a negative effect on AE. History of pain in the dominant shoulder and in the ankles/knees was associated with lower SS and higher VJH, respectively. Conclusions: Based on the findings and the existing literature, volleyball players and coaches are advised to focus on maximization of VJH and optimization of attack technique; recommendations to improve attack success are provided.

Performance Characteristics of Volleyball Players with Patellar Tendinopathy

2003 ◽  
Vol 31 (3) ◽  
pp. 408-413 ◽  
Author(s):  
Øystein Lian ◽  
Per-Egil Refsnes ◽  
Lars Engebretsen ◽  
Roald Bahr
Keyword(s):  
Body Weight ◽  
Performance Characteristics ◽  
Patellar Tendinopathy ◽  
Control Group ◽  
Average Force ◽  
Specific Strength ◽  
Volleyball Players ◽  
Overall Performance ◽  
High Level ◽  
Work Done

Background Patellar tendinopathy is assumed to result from chronic tendon overload. There may be a relationship between tendon pain and jumping ability. Hypothesis There is no difference in performance characteristics between volleyball players with patellar tendinopathy and those without. Study Design Prospective cohort study. Method We examined the performance of the leg extensor apparatus in high-level male volleyball players with patellar tendinopathy (N = 24) compared with a control group (N = 23) without knee symptoms. The testing program consisted of different jump tests with and without added load, and a composite jump score was calculated to reflect overall performance. Results The groups were similar in age, height, and playing experience, but the patellar tendinopathy group did more specific strength training and had greater body weight. They scored significantly higher than the control group on the composite jump score (50.3 versus 39.2), and significant differences were also observed for work done in the drop-jump and average force and power in the standing jumps with half- and full-body weight loads. Conclusions Greater body weight, more weight training, and better jumping performance may increase susceptibility to patellar tendinopathy in volleyball players.

scholarly journals The Synergy between Burden and Anticipatory Grief among Caregivers of People Living with HIV/AIDS in Calabar Municipality, Nigeria

2020 ◽  
Vol 2 (4) ◽  
pp. 8
Author(s):  
Ekaete F. Asuquo ◽  
Regina E. Ella ◽  
Paulina A. Akpan-Idiok ◽  
Easter E. Osuchkwu
Keyword(s):  
Primary Data ◽  
People Living With Hiv ◽  
Anticipatory Grief ◽  
Cross River State ◽  
Sub Saharan ◽  
Positive Correlations ◽  
High Level ◽  
Living With Hiv ◽  
The Relationship ◽  
Hiv Aids

Contents: Caregiving remains the crux of management in terminal diseases, but little attention is given to the effects of terminal illnesses on the caregivers and the associated anticipatory grief that aggravates caregivers' burden. Aim: This study assesses the correlations between burden and anticipatory grief experienced among caregivers of people living with HIV/AIDS (PLWHA) in Calabar Municipality, Cross River State, Nigeria. Methods: Correlations and descriptive cross-sessional design were utilized to assess and purposefully recruit 231 eligible caregivers of PLWHA, respectively. Validated revised Zarit Burden Interview scale (ZBI) and Anticipatory Grief Scale were the primary data collection instruments. Data were analyzed using SPSS version 21.0. Results: Study findings revealed that the highest percentage, 36.4% (84) participants experienced a moderate burden, while 22.1% (51) experienced a severe burden. Similarly, the highest percentage, 33.3% (77) of the participants experienced moderate anticipatory grief at the range of 57-76, while 30.7% (71) participants experienced severe anticipatory grief within 77- 135. Positive and significant correlations (r = 0.61, P < 0.05; r = 0.53, P < 0.05; r = 0.66, P < 0.05) were obtained for the relationship between no anticipatory grief/burden; mild anticipatory grief/ burden and severe anticipatory grief/ burden respectively) during the study. These positive correlations revealed a strong synergy between the two variables, caregiver’s burden and anticipatory grief. Conclusion: As sub-Saharan African disproportionately bears the burden of HIV, more persons will have to take up family caregivers' roles despite the high level of burden and associated anticipatory grief. The need for educational intervention backed by the policy cannot be over-emphasized and should be implemented to enhance and acquaint caregivers on the nature of anticipatory grief and its connection with a terminal disease like HIV/AIDS.  

scholarly journals Correlation between Pupils’ and Teachers’ Opinions regarding the Spheres and Effects of ICT Use by Children and Teenagers (Research Report)

2021 ◽  
Vol 48 (4) ◽  
pp. 440-458
Author(s):  
Eunika Baron-Polańczyk
Keyword(s):  
Statistical Methods ◽  
Information Literacy ◽  
Research Report ◽  
Survey Questionnaire ◽  
Ict Use ◽  
The World ◽  
Positive Correlations ◽  
High Level ◽  
The Relationship ◽  
Very High

The article presents a fragment of diagnostic-correlative research of a mixed character, identifying pupils’ information literacy in the use of ICT methods and tools in the context of new technological trends and accompanying civilisation changes. The authors aim to answer the question: What is the relationship between pupils’ opinions and teachers’ observations regarding the spheres and effects of ICT use by children and teenagers? For this purpose, the method of diagnostic survey (questionnaire and interview) and statistical methods were used. Together, 2510 pupils and 1110 teachers (in Poland) were involved. The interpretation of the strength of relationship between the co-existent variables – based on the obtained values of correlation (r) and determination (r2) coefficients – in general allows for stating that: 1) a noticeable dissonance exists between pupils’ opinions and teachers’ observations regarding the spheres and effects of ICT use by children and teenagers; 2) the identified differences (the minus/negative correlations in 6 cases) and similarities (the plus/ positive correlations in 4 cases) between pupils’ and teachers’ opinions indicate a significant “separation” between the world of children and teenagers (“Us”) and the world of teachers (“Them”); 3) in three categories, an obvious relationship (a very high level of dependence) exists between pupils’ and teachers’ observations as to the spheres and effects of ICT use by children and teenagers, namely “working with information” (r2 = 0.79; r = 0.89), “network communication” (r2 = 0.78; r = 0.88), and “preparing for classes” (r2 = 0.70; r = -0.84).

scholarly journals The Relationship between Vitamin D Status and Rotator Cuff Muscle Strength in Professional Volleyball Athletes

Nutrients ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 2768 ◽  
Author(s):  
Do Kyung Kim ◽  
Geon Park ◽  
Liang-Tseng Kuo ◽  
Won Hah Park
Keyword(s):  
Vitamin D ◽  
Muscle Strength ◽  
Vitamin D Insufficiency ◽  
Vitamin D Status ◽  
Shoulder Muscle ◽  
Vitamin D Levels ◽  
Volleyball Players ◽  
The Relationship ◽  
Shoulder Muscle Strength ◽  
External Rotator

This study aimed to examine the vitamin D status of professional volleyball athletes and to determine its correlation with shoulder muscle strength. We included 52 healthy male professional volleyball players (23.2 ± 4.5 years), who were categorized by vitamin D status (<20 ng/mL: deficiency, 20–30 ng/mL: insufficiency, and >30 ng/mL: sufficiency). We examined the strength of the internal rotator (IR) and external rotator (ER) muscles of the shoulder by using an isokinetic dynamometer. Fourteen players (26.9%) had vitamin D deficiency, 24 players (46.2%) were vitamin D-insufficient, and 14 players (26.9%) were vitamin D-sufficient. There was no significant correlation between vitamin D level and shoulder muscle strength at 60°/s (IR, r = 0.159, p = 0.26; ER, r = 0.245, p = 0.08) and at 180°/s (IR, r = −0.093, p = 0.51; ER, r = −0.037, p = 0.79). Moreover, the isokinetic shoulder strengths were not significantly different across the three groups in all settings. In conclusion, vitamin D insufficiency was common in elite volleyball players. Though not being associated with isokinetic muscle weakness, vitamin D levels should be regularly monitored, and vitamin D should be supplied to young elite athletes, considering its importance for musculoskeletal health.

scholarly journals The Relationship between Vitamin D Status and Rotator Cuff Muscle Strength in Professional Volleyball Athletes

2019 ◽  
Author(s):  
Do Kyung Kim ◽  
Geon Park ◽  
Liang-Tseng Kuo ◽  
Won hah Park
Keyword(s):  
Vitamin D ◽  
Muscle Strength ◽  
Vitamin D Insufficiency ◽  
Vitamin D Status ◽  
Isokinetic Dynamometer ◽  
Shoulder Muscle ◽  
Volleyball Players ◽  
The Relationship ◽  
Shoulder Muscle Strength ◽  
External Rotator

This study aimed to examine the vitamin D status of professional volleyball athletes and to determine its correlation with shoulder muscle strength. We finally included 52 healthy male professional volleyball players (23.2 &plusmn; 4.5 years), who were categorized by vitamin D status (&lt;20 ng/mL: deficiency, 20-30 ng/mL: insufficiency, and &gt;30 ng/mL: sufficiency). We examined the strength of the internal rotator (IR) and external rotator (ER) muscles of the shoulder by using isokinetic dynamometer. Fourteen players (26.9%) had vitamin D deficiency, 24 players (46.2%) were vitamin D insufficient, and 14 players (26.9%) were vitamin D sufficient. There was no significant correlation between the vitamin D level and shoulder muscle strength at 60&deg;/s (IR, r = 0.159, p = 0.26; ER, r = 0.245, p = 0.08), and at 180&deg;/s (IR, r = - 0.093, p = 0.51; ER, r = - 0.037, p = 0.79). Moreover, the isokinetic shoulder strengths were not significantly different across the three groups in all settings. In conclusion, vitamin D insufficiency was common in elite volleyball players. Though not being associated with isokinetic muscle weakness, vitamin D should be regularly monitored and supplemented in young elite athletes, considering its importance on musculoskeletal health.

scholarly journals The relationship between self-efficacy and athlete burnout in elite volleyball players

2019 ◽  
Vol 23 (5) ◽  
pp. 231-238
Author(s):  
Ç.V. Koçak
Keyword(s):  
Negative Correlation ◽  
Self Efficacy ◽  
Personal Information ◽  
Significance Level ◽  
Athlete Burnout ◽  
Volleyball Players ◽  
Kolmogorov Smirnov ◽  
High Level ◽  
The Relationship ◽  
General Self Efficacy

Purpose : The researches about the relationship between self-efficacy and athlete' burnout of elite volleyball players who playing in high level leagues is not available in the literature. The aim of this study is to investigate the relationship between self-efficacy and athletes’ burnout in elite volleyball players. Material : The study group is consisted 173 [n=61 female, n=112 male] elite volleyball players. The mean of the age of participants was 25.6 year [± 6.3]. Data was collected by personal information form, General Self-Efficacy Scale [GSE] and Athlete Burnout Questionnaire [ABQ]. SPSS 22 program was used in the analysis of the obtained data. Kolmogorov-Smirnov test was applied to determine whether the data showed normal distribution and the significance level was accepted as 0.05 in the analyses. Parametric tests were used in the analysis of the data. Results : As a result of the research, high level negative correlation was found between effort and resistance sub-dimension [GSE] and the reduced sense of accomplishment sub-dimension [ABQ] [p<0.01]. In the same way, there was a negative correlation between ability and confidence sub-dimension [GSE] with reduced sense of accomplishment sub-dimension [ABQ] [p<0.01]. Conclusions : This result shows that athletes with high general self-efficacy level have less athlete burnout than others. Volleyball players who played in national teams have higher self-efficacy than others, while athletes have less athlete' burnout. Gender has no relation on volleyball players' self-efficacy and burnout. As the age of the participants decreased, burnout levels increased.

Academic motivation and professional skills development in the Specialty of Social Sciences and Tourism at a public university [Motivación académica y desarrollo de competencias profesionales en la Especialidad de Ciencias Sociales y Turismo de una universidad pública]

2019 ◽  
Vol 1 (2) ◽  
pp. 96
Author(s):  
Ana Cecilia De Paz Lazaro ◽  
Jessica Luz Palomino Collantes
Keyword(s):  
Social Sciences ◽  
Academic Motivation ◽  
Public University ◽  
Skills Development ◽  
Professional Skills ◽  
Research Results ◽  
Competencias Profesionales ◽  
High Level ◽  
The Relationship

The objective of the research is to determine the relationship between academic motivation and the professional skills development in the specialty of Social Sciences and Tourism. The study is quantitative and the design is non-experimental correlational translational. The results indicate that there is a high level relationship (0.914) between the independent academic motivation variable and the professional competences development in the Specialty of Social Sciences and Tourism. In conclusion, motivation is directly related to the professional skills development in the specialty of Social Sciences and Tourism. The research results conclude that there is a high relationship between the variables.

Barriers of physical activity (kinesiophobia) in patients subjected to cardiac rehabilitation

2014 ◽  
Vol 6 (4) ◽  
Author(s):  
Janusz Kocjan ◽  
Andrzej Knapik
Keyword(s):  
Physical Activity ◽  
Cardiac Rehabilitation ◽  
Short Form ◽  
Social Activity ◽  
Self Assessment ◽  
Rehabilitation Process ◽  
Sf 36 ◽  
Polish Version ◽  
High Level ◽  
The Relationship

AbstractBackground: Comprehensive cardiac rehabilitation (CR) is a process designed to restore full physical, psychological and social activity and to reduce cardiovascular risk factors. Fear of movement may contribute to the occurrence and intensification of hypokinesia, and consequently affect the effectiveness of therapy. The aim of the study was to determine the level of barriers of physical activity in patients undergoing cardiac rehabilitation. The relationship between selected determinants (age and health selfassessment) and the kinesiophobia level were also examined.Material/Methods: 115 people aged 40-84 years were examined: 50 females (x = 63.46; SD = 11.19) and 65 males (x = 64.65; SD = 10.59) - patients undergoing cardiac rehabilitation at the Upper-Silesian Medical Centre in Katowice. In the present study, the Polish version of questionnaires: Kinesiophobia Causes Scale (KCS) and Short Form Health Survey (SF-36) were used. Questionnaires were supplemented by authors’ short survey.Results: The patients presented an elevated level of kinesiophobia, both in general as well as in individual components. In women, the kinesiophobia level was higher than in men. The psychological domain was a greater barrier of physical activity than the biological one. Strong, negative correlations of psychological and biological domains of kinesiophobia to physical functioning (SF-36) were noted in women. In the case of men, correlations were weaker, but also statistically significant.Conclusions: 1. Sex differentiates patients in their kinesiophobia level 2. Poor self-assessment of health is associated with a greater intensification of kinesiophobia 3. A high level of kinesiophobia may negatively affect cardiac rehabilitation process

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