Jumping Flying Distance and Jump Performance of Elite Male Volleyball Players at FIVB Volleyball Men’s World Championship

We investigated different specific jumping performances of high-level male volleyball players. The aim of this study was to assess covered jumping distance, jump height, and number of jumps performed at certain positions by volleyball players competing at the 2014 FIVB Volleyball Men’s World Championship in Poland. A total of 140 male volleyball players from national teams participated in the study. The analysis was performed for jumping flying distance (JFD), jump serve height (SJH), attack jump height (AJH), block jump height (BJH), and quantity of jumps (JC). The analysis of JFD of attack jumps showed that the middles covered a shorter distance than the other players. When analyzing the block jump lengths, distance during jump performance covered by the receivers (R1) was shorter than that of the opposites. Analysis of SJH by volleyball players at various positions showed statistically significant differences (P < 0.05) among the middles (M1, M2), receivers (R1, R2), and opposites (O). Statistically significant differences (P < 0.05) in BJH were found between the middles and the rest of the players. The results of the experiment show a high degree of reliability for jump height during serve and attack, jumping flying distance covered during an attack, and number of block jumps. The strongest relationship was seen between jump components, which predominantly depend only on a volleyball player performing a specific action (e.g., jump serve or attack jump).

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Stretch-Shortening Cycle in Countermovement Jump: Exclusive Review of Force-Time Curve Variables in Eccentric and Concentric Phases

10.20944/preprints201708.0070.v1 ◽

2017 ◽

Author(s):

Mahdi Cheraghi ◽

Javad Sarvestan ◽

Masoud Sebyani ◽

Elham Shirzad

Keyword(s):

Peak Power ◽

Vertical Jump ◽

Average Power ◽

Peak Force ◽

Jump Height ◽

Time Curve ◽

Jump Performance ◽

Volleyball Players ◽

Time Variables ◽

Force Time

The importance of vertical jump in sport fields and rehabilitation is widely recognized. Furthermore, Force-Time variables of vertical jump are factors affecting jumping height. Exclusive review of each of this variables, in eccentric and concentric phases, can lead to a specific focus on them during jumping exercises. So, the aims of his study were to a) reviewing the relationship between force-time curve variables of eccentric and concentric phases with jump height and b) description of this variables in Iran national youth volleyball players society. This is an observational study. 12 elite volleyball player (Male, Iran national youth volleyball players, 17±0.7 years) have participated in this study. Correlation between Force-Time variables - included peak force (PF), relative peak force (RPP), peak power (PP), average power (AP), relative peak power (RPP), and Modified Reactive Strength Index (MRSI) - in eccentric and concentric phases and ultimate jump height has been studied. Results showed that the average power (r=0.7) and relative peak force (r=0.75) of concentric phase and MRSI (r=0.83) have significant correlation with ultimate jump height (JH). Relative peak power and average power of concentric phase can massively effect Jump Height in sports like volleyball, which vertical jump is an integral part of them. Focus on both of these factors, which has been studied in this research, in training programs, can improve athlete jump performance significantly.

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Using an overhead target increases volleyball-specific vertical jump performance

Proceedings of the Institution of Mechanical Engineers Part P Journal of Sports Engineering and Technology ◽

10.1177/17543371211039632 ◽

2021 ◽

pp. 175433712110396

Author(s):

Mehmet Yildiz ◽

Zeki Akyildiz ◽

Filipe Manuel Clemente ◽

Deniz Yildiz

Keyword(s):

Training Program ◽

Repeated Measures ◽

Vertical Jump ◽

Control Group ◽

Jump Height ◽

Long Term Effects ◽

Jump Performance ◽

Volleyball Players ◽

Vertical Jumps ◽

Regular Training

In volleyball, spikes, and block jumps are among the most important movements when earning points and impacting performance. Many studies have found a greater jump height after acutely augmented feedback and extrinsic focus of attention on vertical jump height. However, there are limited studies on the long-term effects of using an overhead target on volleyball-specific vertical jumps (block and spike jumps). Therefore, the aim of the current study was to investigate the effects of using an overhead target on the vertical jump heights of volleyball players. Twenty-five professional male volleyball players (age: 24.44 ± 3.78 years; height: 1.82 ± 8.79 cm; body mass: 80.96 ± 9.37 kg) were randomly assigned either to the experimental group with an overhead target (OHT) ( n = 9), group without an overhead target (WOHT) ( n = 10), or the control group ( n = 8). The OHT group performed vertical jumps with an overhead target before their regular training program, while the WOHT group completed vertical jumps without an overhead target before their regular training program. Meanwhile, the control group performed only their regular training program, which was a 5 week (3 days per week) program. All participants’ spike jump (SPJ) and block jump (BJ) results were assessed before and after the intervention. A repeated-measures analysis of variance (3 × 2) did not reveal any significant between-group interactions for SPJ and BJ ( F = 7.32, p < 0.11 and F = 1.59, p < 0.22 respectively), but significant results were found for the time effect ( F = 96.33, p < 0.01 and F = 132.25, p < 0.01 respectively) and group × time interaction ( F = 42.59, p < 0.01 and F = 61.52, p < 0.01, respectively). While the pre- and post-tests for BJ and SPJ values did not change in the control group ( p > 0.05), both of these values increased in the OHT group (60.00 ± 5.95–67.44 ± 5.98 cm, p < 0.01 for d = 1.24 and 49.00 ± 6.74–56.22 ± 5.29 cm p < 0.01 for d = 1.19, respectively) and WOHT group (57.50 ± 4.86–60.50 ± 4.99 cm, p < 0.01 for d = 0.60 and 47.75 ± 4.65–50.25 ± 3.69 cm, p < 0.01 for d = 0.59). It has been suggested that trainers and professionals can use an overhead target to increase the BJ and SPJ heights of professional volleyball players.

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Morphologic and Anthropometric Characteristics of High Level Dutch Korfball Players

Perceptual and Motor Skills ◽

10.2466/pms.1996.82.1.35 ◽

1996 ◽

Vol 82 (1) ◽

pp. 35-42 ◽

Cited By ~ 1

Author(s):

Mário Godinho ◽

Isabel Fragoso ◽

Filomena Vieira

Keyword(s):

Lean Body Mass ◽

Body Mass ◽

Body Fat ◽

Team Sport ◽

The Other ◽

Endurance Athletes ◽

Anthropometric Characteristics ◽

Volleyball Players ◽

Apparent Similarity ◽

High Level

In this study a morphologic and anthropometric characterisation of Dutch korfball players ( N = 36) is performed. Data, compared with those of other sports populations, showed that (1) korfball athletes are smaller and lighter than basketball and volleyball players but heavier and taller than other team-sport players; (2) korfball players have less relative body fat, more lean body mass, more limb fat, and less or similar trunk fat than the other athletes. (3) Male korfball players presented a somatotype (1.9–4.4–3.4) similar to endurance athletes and an endomorphic value lower than or similar to the other athletes. (4) The only apparent similarity between female korfball somatotype (3.2–4.0–2.8) and other athletes' somatotypes is the dominance of mesomorphy.

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Karyotype traits in Grindelia squarrosa (Pursh) Dunal (Asteraceae), an invasive plant in Romania

Silvae Genetica ◽

10.1515/sg-2012-0023 ◽

2012 ◽

Vol 61 (1-6) ◽

pp. 179-186 ◽

Cited By ~ 1

Author(s):

Elena Truta ◽

Gabriela Vochita ◽

Adrian Oprea ◽

Culita Sirbu

Keyword(s):

Chromosome Number ◽

Invasive Plant ◽

Chromosome Length ◽

The Other ◽

Diploid Chromosome Number ◽

Diploid Complement ◽

High Level ◽

High Degree ◽

First Time

Abstract The description of the karyotype features and idiogram in Grindelia squarrosa (Pursh) Dunal (Asteraceae), an invasive plant in Romania, are reported here for the first time. The diploid chromosome number is 2n=2x=12, in agreement with the data published for the other species of the genus. The karyomorphological data show that the complements of the studied genotypes have small chromosomes (mean chromosome length is X̅±SE=2.56±0.10 μm, and mean length of haploid complements is X̅±SE=15.33±0.69 μm, with a range of variability comprised between 12.87-17.51 μm). The karyotypes are made up of six pairs of metacentric and submetacentric chromosomes, with an identical formula of the diploid complement: KF=2n=12=8m+ 2sm + 2sm-SAT. Satellites are located on the short arms of the chromosomes of pair III. The karyotypes show a relatively high level of intra-specific uniformity as well as similar symmetry patterns (R=1.29-1.53; TF%=38.78-41.57%; AsI%=54.54-57.61%; A1 = 0.24- 0.32; A2=0.08-0.16), belonging to 1A and 2A classes of symmetry. The small size of the chromosomes, the presence of only two chromosome morphometric types, and the preponderance of metacentrics confer a relatively high degree of symmetry to the karyotypes studied.

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Lower Limb Neuromuscular Asymmetry in Volleyball and Basketball Players

Journal of Human Kinetics ◽

10.1515/hukin-2015-0150 ◽

2016 ◽

Vol 50 (1) ◽

pp. 135-143 ◽

Cited By ~ 15

Author(s):

Azahara Fort-Vanmeerhaeghe ◽

Gabriel Gual ◽

Daniel Romero-Rodriguez ◽

Viswanath Unnitha

Keyword(s):

Lower Limb ◽

Vertical Jump ◽

Primary Objective ◽

Asymmetry Index ◽

Female Group ◽

Jump Height ◽

Basketball Players ◽

Jump Performance ◽

Male And Female ◽

Volleyball Players

AbstractThe primary objective of the present study was to evaluate the agreement between the dominant leg (DL) (determined subjectively) and the stronger leg (SL) (determined via a functional test) in a group of basketball and volleyball players. The secondary objective was to calculate lower limb neuromuscular asymmetry when comparing the DL vs the non-dominant leg (NDL) and the SL vs the weaker (WL) leg in the whole group and when differentiating by sex. Seventy-nine male and female volleyball and basketball players (age: 23.7 ± 4.5 years) performed three single-leg vertical countermovement jumps (SLVCJ) on a contact mat. Vertical jump height and an inter-limb asymmetry index (ASI) were determined. Only 32 (40%) of the subjects had a concordance between the perception of their dominant leg and the limb reaching the highest jump height. Using the DL as the discriminating variable, significant (p<0.05) inter-limb differences were found in the total group of players. When comparing between sexes, significant differences (p<0.05) arose in the female group only. With regard to the WL vs. the SL, significant (p<0.05) differences were noted in the whole group and when stratified into males and females. The mean ASI ranged from 9.31% (males) to 12.84% (females) and from 10.49% (males) to 14.26% (females), when comparing the DL vs. the NDL and the SL vs. the WL, respectively. Subjective expression of leg dominance cannot be used as a predictor of limb jump performance. Vertical jump asymmetry of 10-15% exists and this can be considered as a reference value for male and female basketball and volleyball players.

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Strength and vertical jump performance changes in elite male volleyball players during the season (Cambios en el rendimiento en fuerza y salto vertical en jugadores de élite masculinos de voleibol durante la temporada)

Retos ◽

10.47197/retos.v0i34.65898 ◽

2018 ◽

pp. 291-294

Author(s):

Miguel Sánchez Moreno ◽

Carlos García Asencio ◽

Juan José González Badillo ◽

David Díaz Cueli

Keyword(s):

Beneficial Effect ◽

Strength Training ◽

Physical Performance ◽

Lower Limb ◽

Vertical Jump ◽

Jump Height ◽

Jump Performance ◽

Vertical Jump Height ◽

Competitive Season ◽

Volleyball Players

Abstract. This study aimed to analyze the effect of strength training on physical performance in elite male volleyball players during the competitive season. Athletes were assessed at the start of season (SS), midpoint of the competitive season (MS), and at the end of the season (ES). Significant increases were observed in vertical jump height (CMJ), jump squat height (JS) and mean propulsive velocity (MPV) from SS to ES (P < 0.05). Likely beneficial increases were observed on CMJ from SS to MS, on JS from SS to MS and from MS to ES. In addition, likely beneficial effect was found on MPV from MS to ES. Over the full season (SS to ES), very likely beneficial effect was observed on CMJ, MPV and JS. In conclusion, increase in strength of lower limb and vertical jump can be achieved in professional volleyball players over a full playing season. Resumen. El objetivo del estudio fue analizar los efectos de un programa de entrenamiento de fuerza sobre el rendimiento en la fuerza del miembro inferior y la capacidad de salto vertical en jugadores de voleibol masculinos durante la temporada de competición. Los atletas fueron evaluados al inicio (SS), a la mitad (MS) y al final de la temporada (ES). Se observaron aumentos significativos en la altura del salto vertical (CMJ), del salto con cargas (JS) y en la velocidad media propulsiva (MPV) alcanzada con las cargas comunes en el ejercicio de sentadillas entre SS y ES (P < 0.05). El análisis basado en la magnitud del cambio reveló un aumento probable en CMJ de SS a MS, y en JS de SS a MS y de MS a ES. Además, un incremento probable se encontró en MPV de MS a ES. Durante la temporada completa (SS a ES), se observó un aumento muy probable en CMJ, en MPV y JS. En conclusión, se puede lograr un aumento en la fuerza de la extremidad inferior y el salto vertical en jugadores profesionales de voleibol durante una temporada de juego completa.

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Identification of high-performance volleyball players from anthropometric variables and psychological readiness: A machine-learning approach

Proceedings of the Institution of Mechanical Engineers Part P Journal of Sports Engineering and Technology ◽

10.1177/17543371211045451 ◽

2021 ◽

pp. 175433712110454

Author(s):

Rabiu Muazu Musa ◽

Anwar P.P. Abdul Majeed ◽

Muhammad Zuhaili Suhaimi ◽

Mohamad Razali Abdullah ◽

Mohd Azraai Mohd Razman ◽

...

Keyword(s):

Machine Learning ◽

High Performance ◽

Clustering Algorithm ◽

Team Sports ◽

Minority Class ◽

Analysis Technique ◽

Volleyball Players ◽

Low Performance ◽

High Level ◽

High Degree

Modern indoor volleyball has evolved into a high-level strength sport and is seen as one of the most popular open-skilled team sports. The nature of the sport as an open-based skill requires players to have a high degree of both psychological skill and physical ability to cope with the sport’s externally and internally induced pace. The purposes of this study were to examine the essential basic anthropometric variables, as well as competition and practice psychological readiness, that could provide a performance edge and identify high and low-performance players based on the parameters. The anthropometric variables of height, weight, and age were assessed, while the test for performance strategies instrument was used to evaluate competition and practice psychological readiness skills of the players. The players’ performances were analyzed in real-time during a volleyball tournament. The Louvain clustering algorithm was used to determine the performance class of the players with reference to the variables evaluated. A total of 45 players were ascertained as high-performance volleyball players (HVP), while 20 players were deemed as low-performance volleyball players (LVP) via the clustering analysis technique. The logistic regression classifier was used to classify the performance of the players. Nonetheless, owing to the skewed representation between the HVP and LVP during the training of the model, the Synthetic Minority Oversampling TEchnique (SMOTE) was employed to artificially increase the minority class dataset to avoid the overfitting notion upon classification. It was shown from the study that, through the machine learning pipeline developed, an excellent identification of the HVP and LVP could be attained. The findings could be invaluable to coaches and other relevant stakeholders in team preparation and the selection of high-performance players in volleyball.

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Adaptive Resetting of SMA-Actuators

ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 2 ◽

10.1115/smasis2010-3749 ◽

2010 ◽

Cited By ~ 2

Author(s):

Sven Langbein ◽

Tim Sadek ◽

Alexander Czechowicz

Keyword(s):

High Power ◽

Development Process ◽

The Other ◽

High Power Density ◽

Simulation Tools ◽

Mode Of Operation ◽

Return Spring ◽

High Level ◽

High Degree ◽

Silent Mode

Shape Memory Alloys (SMAs) have essential advantages compared to conventional actuators, in particular their high power density and their silent mode of operation. However, this material has not gained acceptance in technical applications yet. The main reasons are the missing simulation tools and a lack of knowledge of materials as well as the companies’ uncertainty how to handle SMAs. The resetting of the SMA element to generate a repeatable movement is often a defined problem. In this context reset springs made of steel are conventional solutions although their characteristics are a disadvantage. To reach a high level of power output and hence a high degree of efficiency, a reduction of the pre-load is necessary. A solution for this problem is an adaptive resetting. One main possibility to generate an adaptive resetting is given by the agonist-antagonist principle where two SMA-elements work against each other. Here the reset force can be applied if necessary. The advantage of this type of design is that a conventional return spring or a mechanical brake for clamping the position (electrically operated) is not necessary. Another possibility for adaptive resetting is to change the spring characteristics of a pseudoelastic SMA-element by heating. The aim of this study is to show the properties of the agonist-antagonist design and the other concepts. It also provides methods and the knowledge to support the development process of such resetting principles. The development of these methods is based on the analysis of different designs and requirements. Based on the results, instructions for the conception of adaptive resetting systems have been created.

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Jump Performance During Official Matches in Elite Volleyball Players: A Pilot Study

Journal of Human Kinetics ◽

10.2478/hukin-2018-0080 ◽

2019 ◽

Vol 67 (1) ◽

pp. 259-269 ◽

Cited By ~ 1

Author(s):

Ricardo Franco Lima ◽

José M. Palao ◽

Filipe Manuel Clemente

Keyword(s):

Pilot Study ◽

Study Design ◽

Reference Values ◽

Jump Height ◽

Jump Performance ◽

Inertial Measurement ◽

Different Types ◽

Volleyball Players ◽

Jump Ability ◽

And Training

AbstractThe purpose of this pilot study was to assess the types and intensity of the jumps that professional male volleyball players executed. Seven male elite volleyball players participated in this study. The sample was composed of 1599 jumps performed in 15 sets of five official matches of the regular season of a professional team. A descriptive pilot study design was implemented to analyze the types of jumps and jump heights by particular playing positions (outside hitters, setter, and middle blockers). The jump height was recorded using an inertial measurement device. No significant differences in the heights of jumps were found between the sets of the matches. Different players’ roles had different frequencies for different types of jumps and jump intensities. The data provide reference values of the type of jumps performed, their frequency, and intensity by particular playing positions in competition. The results confirm the need to individualize the practice and training of volleyball players according to the players’ roles. Extensive studies are needed to provide more information about repeated jump ability in volleyball players.

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Comparison of Morphological Profiles and Performance Variables Between Female Volleyball Players of the First and Second Division In Portugal

Journal of Human Kinetics ◽

10.2478/hukin-2019-0076 ◽

2020 ◽

Vol 71 (1) ◽

pp. 109-117 ◽

Cited By ~ 2

Author(s):

Alberto Carvalho ◽

Paulo Roriz ◽

Daniel Duarte

Keyword(s):

Body Mass ◽

Lean Mass ◽

Vertical Jump ◽

Body Height ◽

Jump Height ◽

Jump Performance ◽

Performance Variables ◽

Arm Span ◽

Volleyball Players ◽

And Performance

AbstractKnowledge of players’ anthropometric profiles may contribute to a better understanding of the differences between their performance levels. For example, vertical jump height, which is a major indicator of a volleyball player’s performance, is influenced by favorable anthropometric variables. This study’s aim was to describe anthropometric profiles of elite female volleyball players competing in the 1st and 2nd divisions in Portugal and to link these profiles with performance skills such as jump height obtained during blocking and spiking actions. Fifty-nine volleyball players were analyzed according to their competitive level, forming three independent groups: GA (n = 20, A1 division, ranked first), GB (n = 21, A1 division, ranked last) and GC (n = 18, A2 division). Anthropometric data collected included body mass and height, arm span, seven skinfolds (triceps, biceps, subscapular, suprailiac, abdominal, thigh and calf), four body perimeters (relaxed brachial, contracted brachial, thigh and calf), and two body diameters (humeral and femoral). Performance data included the height obtained during block and spike actions. Significant differences were found between groups (GA/GB from A1 and GC from A2). Players in the GA had the highest body mass (68.05 ± 6.62 kg, p < 0.05), body height (176.35 ± 6.21 cm, p < 0.05), arm span (177.59 ± 6.09 cm, p < 0.05), lean mass (53.51 ± 4.94 kg, p < 0.05) and vertical jump heights (block: 0.36 ± 0.06 m and spike: 0.43 ± 0.05 m, p < 0.05). As expected, the fat mass percentage of GA players was the lowest (21.30 ± 2.61%). The results suggest that anthropometric profiles of volleyball players may vary according to the competitive level. The higher body mass, body height, arm span, and lean mass presented by GA players in comparison with GC players suggest these variables are important for top-level performance, since these athletes also exhibited higher jump heights. Variables such as height and arm span have a considerable genetic influence and could be important for early talent identification in volleyball. Other variables such as body mass, lean mass and vertical jump performance are more complex, since they also reflect the effects of environmental and training conditions.

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