A systematic review of volleyball spike kinematics: Implications for practice and research

Oliveira, Leonardo dos Santos; Moura, Túlio Bernardo Macedo Alfano; Rodacki, André Luíz Félix; Tilp, Markus; Okazaki, Victor Hugo Alves

doi:10.1177/1747954119899881

Cited by 24 publications

(25 citation statements)

References 41 publications

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“…concussions) in women compared to men might be explained by the sex dependent differences in playing behaviour on the one hand and biomechanics on the other hand. The maximum ball speed during spiking is about 24.5 m/s for men and 17.9 m/s for women (for review see: [ 74 ]). Since the ball is equally heavy for both sexes, the impulse of the ball for women is about 73% of the impulse for men.…”

Section: Discussionmentioning

confidence: 99%

Sex differences in the consumption of over-the-counter analgesics among amateur volleyball players

Hager

Averbeck²,

Voelcker‐Rehage

et al. 2021

BMC Sports Sci Med Rehabil

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Background Compared with the normal adult population, athletes of several sport disciplines, such as endurance sports, ball sports, cycling and swimming, have higher use of over-the-counter analgesics (OTC analgesics). The aim of this study was to describe the epidemiology of OTC analgesic use in volleyball players as a typical competitive sport discipline. One particular focus was placed on the analysis whether the athletes’ use of OTC analgesics was influenced by their performance motivation. Methods A cross-sectional survey among amateur volleyball players was carried out using a web-based sports questionnaire. The study included athletes of both sexes, 18 years and older, currently playing in a German volleyball league. The athletes’ sport-related complaints were evaluated regarding the use of OTC analgesics. The use of OTC analgesics by athletes was compared with their performance motivation, based on the „Achievement Motives Scale - Sport” (AMS-Sport) questionnaire. Results The analysis of 114 completed questionnaires of amateur athletes revealed that the use of OTC analgesics was sex dependent, with a higher prevalence of use in female players (60%) versus male players (38%). The main reasons for consumption of OTC analgesics were pain in the head, knee and shoulder. The most frequently taken drug was ibuprofen, most often taken at competitions and over a period of 4 years (median). The analysis of the AMS-Sport questionnaire revealed that a logistic regression model for estimating the probability of drug use can be explained by the factors hope of success and years of playing practise in female players but not male players. In females, an increase in the factor hope of success resulted in a lower probability of OTC analgesic use, while an increase in years of playing practise resulted in a higher probability of use. Conclusion The average duration that volleyball players in this study took OTC analgesics was higher than that of the German population, and OTC analgesic use was more prevalent in female than male volleyball players. Thus, to reduce the prevalence of OTC analgesic use, educational programs should be implemented in sports teams; and, to reduce direct and indirect social pressure, sports teams should also receive sex-specific psychological support.

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Section: Discussionmentioning

confidence: 99%

Sex differences in the consumption of over-the-counter analgesics among amateur volleyball players

Hager

Averbeck²,

Voelcker‐Rehage

et al. 2021

BMC Sports Sci Med Rehabil

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“…Since the concept of pose estimation was put forward, scholars at home and abroad have conducted a lot of research for this [6,7]. When estimating the human body pose, two main solutions are used, namely, the traditional image processing method and the method based on deep learning [8]. Although the traditional method has high time efficiency, it mainly extracts SHIFT features and HOG features, and these features are manually set, which will lead to different viewing angles, appearances, occlusions, and their inherent geometry in the image [9].…”

Section: Introductionmentioning

confidence: 99%

[Retracted] Comparative Analysis of Volleyball Serve Action Based on Human Posture Estimation

Zhou

Saeed²

2022

Mobile Information Systems

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Serving is one of the most crucial techniques in volleyball. Serving is a method that does not require team interaction and is difficult for the opponent to immediately interfere with. The feature migration module with a fixed offset is suggested in this work. This module can be thought of as a cross-channel dilated convolution approximation of dilated convolution. The reason cross-channel dilated convolution is not worse than standard dilated convolution with few parameters is discussed in this article. An improved random forest model is put forth to address the issue of the human pose estimation system’s high memory consumption when utilizing random forest as the classifier. This model presents the Poisson process and incorporates it with the depth data to create a filter before using Bootstrap sampling. In order to optimize and reconstruct the training dataset, a portion of the feature sample points that do not contribute positively to subsequent classification is removed from the original training dataset. This allows the training dataset to better account for the repeated sampling of the random forest during the sampling process. Resampling has some drawbacks, but they are not very representative. The effectiveness of the optimization model, which significantly lowers the system’s time and space complexity and increases the system’s applicability, is demonstrated by experiments.

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“…They act as prerequisites for their further improvement [18,36]. This can be fully ensured only with such an organization of physical training, taking into account the specific patterns of the organism development process of adaptation to this mode of muscular work [40]. It is necessary to approach the solution of improving the movements technique issues of a volleyball player taking into account the organic relationship of physical and technical sides of motor activity, individual characteristics of an athlete [41,42].…”

Section: Pedagogymentioning

confidence: 99%

Combined impact method in the preparatory period of the annual macrocycle of female volleyball players aged 18–19 years old

Boichuk

Єрмаков

Vintoniak

et al. 2021

ppcs

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Background and Study Aim. The work aim is to develop and experimentally test the combined impact method performance in the preparatory period of the annual macrocycle of 18–19 year old volleyball players (girls). Material and Methods. The study involved volleyball players (girls) aged 18–19 years old (n = 24, training experience – 9 years). Volleyball players (girls) were divided into control (n = 12) and experimental (n = 12) groups. Results. The method contributed to a higher rate of growth of most parameters of special readiness among volleyball players (girls) of the experimental group. A significant improvement in special readiness (p <0.05) was revealed for all parameters in both groups. In the experimental group, an improvement (p <0.001) was observed for 8 out of 11 parameters. In the control group, a significant improvement in the results (p <0.001) occurred in 3 cases out of 11. A significant improvement in speed and strength training parameters (p <0.001) was revealed: in 3 out of 4 cases (experimental group); in 1 out of 4 cases (control group). The quality of performance of the game basic techniques improved by: 4–22% (p <0.04–0.001 in experimental group) 4–11% (p <0.05–0.02 in control group). Conclusions. It is advisable to devote more time to the development of more significant motor abilities of volleyball players (girls) (speed, speed and strength, dexterity and coordination). It is advisable to improve endurance in combination with the development of other motor abilities and in the process of technical and tactical improvement. In the physical training of volleyball players (girls), it is advisable to use as many training means as possible, which are similar to the main game techniques according to spatio–temporal and dynamic characteristics. Movements with load contribute to the development of intermuscular coordination and allow to quickly form the correct idea of the trained motor action.

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A systematic review of volleyball spike kinematics: Implications for practice and research

Cited by 24 publications

References 41 publications

Sex differences in the consumption of over-the-counter analgesics among amateur volleyball players

Sex differences in the consumption of over-the-counter analgesics among amateur volleyball players

[Retracted] Comparative Analysis of Volleyball Serve Action Based on Human Posture Estimation

Combined impact method in the preparatory period of the annual macrocycle of female volleyball players aged 18–19 years old

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