George Giatsis

George Giatsis
Aristotle University of Thessaloniki | AUTH · School of Physical Education and Sports Science

Professor

About

40
Publications
26,602
Reads
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809
Citations
Additional affiliations
September 2009 - present
Aristotle University of Thessaloniki
Position
  • Professor (Associate)

Publications

Publications (40)
Article
Full-text available
The purpose of this investigation was to detect whether differences exist concerning the dynamic and kinematic parameters of vertical squat jump (SJ) on rigid (RS) and sand (SS) surface. Fifteen elite male beach volleyball players (age: 25.6 +/- 6.2 years; height: 188.0 +/- 3.5 cm; body mass: 83.2 +/- 6.0 kg; mean +/- SD, respectively) performed SJ...
Article
Full-text available
Giatsis, G., Lopez Martinez, A.B., & Gea García, G.M. (2015). The efficacy of the attack and block in game phases on male fivb and cev beach volleyball. A review. J. Hum. Sport Exerc., 10(2), pp.537-549. The aim of this study was to investigate the efficacy and differences of the attack, block, and reception in side out and counter-attack phases du...
Article
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The purpose of this study was to investigate the possible arm swing effect on the biomechanical parameters of vertical counter movement jump due to differences of the compliance of the takeoff surface. Fifteen elite male beach-volleyball players (26.2 ± 5.9 years; 1.87 ± 0.05 m; 83.4 ± 6.0 kg; mean ± standard deviation, respectively) performed coun...
Article
The spike is the most frequent type of attack in elite beach volleyball. The aim of this study was to investigate the arm swing techniques during the spike of world elite beach volleyball players. Ninety-six male players were analysed using video recordings from the 2017 Beach Volleyball World Championship. The arm swing movement techniques (bow-an...
Article
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The study investigates volleyball performance indicators that distinguish winning and losing sets in men's and women's Asian competitions. It focuses on balanced sets, defined as those with a score difference of ≤ 5 points for men and ≤ 7 points for women, to avoid bias from lopsided sets. Data from the 2023 Men's and Women's AVC Challenge Cup was...
Article
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ABSTRACTThe aim of this study was to measure the effect of fast play on a handball team’s performance by assessingranking in three European Men’s Championships (Euro 2018, 2020, 2022) as a dependent variable. Theindependent variables indicating fast play were the ranking of the team in the tournament, total fast breaks(TFB) per match played, succes...
Article
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Little is known about the differences in vertical jump biomechanics executed on rigid (RJS) and sand (SJS) surfaces in female indoor and beach volleyball players. Eleven young female beach volleyball players with a combined indoor and beach volleyball sport background performed squat jumps, countermovement jumps with and without an arm swing, and d...
Article
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This study aimed to develop a test for measuring athletes’ performance. Logical, content, construct, criterion validity, as well as reliability, were examined. Three beach volleyball experts evaluated how well the test evaluates the shot skill accuracy according to their judgment (logical validity). A group of eight beach volleyball experts analyze...
Article
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This study aimed to investigate the beach volleyball set and technical performance indicators that best discriminate between winning and losing elite women’s teams in set according to the final score differences of the set. The data have been collected from all sets played (N = 236) in the women’s beach volleyball 2022 World Championship. Cluster a...
Article
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In the last decades, indoor volleyball has experienced significant rule changes and a high player specialization in both sexes. Different spike attack arm swing techniques have developed which might affect performance and risk of injury. While a variety of arm swing techniques was already shown in world class beach volleyball players, it is unclear...
Article
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The aim of this study was to explore the match and technical indicators between winning and losing women's teams in the Olympics and World Championships (2016–2021) depending on the final score of the matches and to compare the winners’ technical indicators in 3-set matches to those of men in the respective competitions. A total of 281 volleyball m...
Article
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The purpose of this study was to explore the match and technical indicators between winning and losing teams in the Olympics and World Championships (2016–2021) depending on the final score of the matches. A total of 273 volleyball match reports were analyzed from the Men's Olympics (2016 and 2021) and World Championships (2014–2018). Discriminant...
Article
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Plyometric training on sand is suggested to result in advanced performance in vertical jumping. However, limited information exists concerning the biomechanics of drop jumps (DJ) on sand. The purpose of the study was to compare the biomechanical parameters of DJs executed on rigid (RIGID) and sand (SAND) surface. Sixteen high level male beach-volle...
Article
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The aim of this study was to explore the set and technical indicators between winning and losing men’s teams in the 2022 beach volleyball World Championship, depending on the set of the matches to 21- (S21) and 15-points (S15). A total of 250 sets and 9,096 points were analysed from the men’s 2022 World Championship. Discriminant function analysis...
Article
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The spike attack is one of the most important skills in beach volleyball, and as an overarm movement, places significant load on the shoulder joint that could lead to increased risk of injury. An analysis of the different techniques used by elite athletes could provide important insights regarding the etiology of these injuries. This study aimed to...
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In the men's final of Beach volleyball in the Rio Olympics 2016 Brazil won Italy team with 2-0 sets. The aim of this study was to find the a) timing characteristics, b) distribution of jumps, c) distribution of side-out and counter-attacks, d) type of attack. Player's age was 29 ± 3.4 years and height was 196.5 ± 8.5 cm (Blockers = 203 cm, Defender...
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The aim of the study was to perform a comparative analysis of the technical-tactical skills of elite male beach volleyball teams in the Olympic Games, Athens 2004. In total, thirty-four games (n=34) of the first eight top teams were studied, and 3484 game actions were videotaped. The study was conducted with the use of the' Sportscout' video-analys...
Article
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Lower limb muscle asymmetries have been thoroughly examined in many studies, which highlighted their detrimental role in sport performance as a risk factor for injury to players. Specifically, in handball, asymmetries in muscle activation and balance asymmetries cause injuries and generally appear as a factor of possible injury of the lower limbs....
Article
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Game analysis in team handball enables the evaluation of basic individual and team characteristics and helps the coaching team intervene and reinforce the training plan. The aim of the present study was to examine and compare the efficiency of shots by playing position in relation with the efficiency of the goalkeeper during defense. Overall, 44 ga...
Article
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The aim of this study was to investigate the efficacy and differences of the attack, block, and reception in side out and counter-attack phases during beach volleyball games. A total of 80 games of FIVB World Tour and European Championships were analyzed. The technical skills analyzed were the type and efficacy of the attack, the type of block, and...
Conference Paper
Beach handball is a new sport that is growing rapidly due to the easy mounting of the pitch and the attractive location (beaches). The sport is similar to the well known handball played in the hall, except that it is played on sand. Although other beach sports there is a thorough scientific approach to research and scientific data in handball beach...
Conference Paper
Full-text available
Beach handball is a sport that in recent years is growing continuously. Because of the easy installation of the pitch and the attractive location (beaches), the sport became very popular worldwide. The sport is almost similar to the one that played in the hall, except that this is played in the sand. Although this sport has increasing popularity, t...
Article
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The aim of the present study was to present the injuries and to examine the effect of gender in risk factors and characteristics of injuries in players of a high competitive level. The sample of the study consisted of 16 juniors, 16 men, 15 young women and 15 women handball players who were members of Greek national teams. All athletes were given a...
Article
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The aim of this paper is to provide some new suggestions concerning the meaning of the frieze of the Parthenon. It is maintained that Pheidias, apart from the presentation of the frieze, also wanted to promote the Athenian youth and at the same time to stress the need for a mighty cavalry for the city of Athens. Pheidias used his artistry to repres...
Article
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The purpose of this study was to find and compare the heights of the men FIVB Beach Volleyball winners in relation to their specialization and court dimensions (9×9 m or 8×8 m). The heights of men’s winners of all FIVB Beach Volleyball (BV) tournaments held between 1987 and 2010 were recorded. The winners were then split into three groups according...
Article
The aim of this study was to calculate sweat rates (measured by weight changes), voluntary fluid intakes, and fluid balance of beach volleyball players during a tournament. Data was collected during the 3 days of the tournament for male players (n=47) age M=26.17 (S.D.=5.12) years old. Participants were weighed before the warm up and they reweighed...
Article
The purpose of this study was to explore the differences in playing characteristics between winning (W) and losing (L) teams in FIVB men's Beach Volleyball (BV) World Tour tournament. A total of 2786 hours and 5044 points of Beach Volleyball were recorded in 59 matches or 118 sets of the 1st 2003 FIVB men's BV tournament in Rhodes, Greece. The tech...
Article
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The purpose of this study was to investigate the differences between two scoring systems, the new rally system (RS) and the old side out (SO), during beach volleyball (BV) matches. The decision made by the Federation of International Volleyball (FIVB) to change the rules was done in order to stabilise the duration of the matches. This would help co...
Article
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The purpose of this study was to develop three beach Volleyball (BV) skill tests and then check their reliability and validity. BV as a new sport requires skill tests to evaluate the athletes' performance. Therefore, after a pretest to athletes, a training intervention program could be followed and useful results for the coaches could be obtained....
Article
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The purpose of this study was to investigate the differences between the two scoring systems, Rally Scoring (RS) and Side Out scoring (SO), in the duration and the score fluctuation of matches in Federation Internationale de Volleyball (FIVB) Women's Beach Volleyball (BV). In this research the duration and the points of 1253 matches were recorded f...
Article
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The purpose of this study was to investigate and compare the performance between winning and losing teams in Beach Volleyball (BV) matches on courts of new (8x8m) and old dimensions (9x9m) at the side out phase. Side out in BV means the change of the right to serve Nine semifinals and seven finals of the Hellenic BV Championship taking place at an...
Article
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The purpose of this study was to investigate if the changes effected on the game of beach volleyball by the enforcement of the new scoring rules, influenced the fluctuation of score of the game. It recorded the total match duration and the number of sets, of 149 Greek games (ΕΠ98), 302 FIVB games (WS98) of 1998 period and 114 Greek games and 308 FI...
Article
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The aim of this study was to assess the changes, which are observed in the performance of Beach Volleyball (BV) teams after the reduction effected to the dimensions of the court. 5 semi-final and 11 final games of the Hellenic Championship (HC) were recorded, in a court of 8x8m (HC8x8) and 9x9m (HC9x9) and the following performance parameters were...

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