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Title: Effects of experimental volleyball rules quantified by type and number of jumps, hits and contacts
Authors: Stankovic, Mladen
Peric, Dusan
Ruiz-Llamas, Guillermo 
Quiroga-Escudero, Miriam E. 
UNESCO Clasification: 5802 Organización y planificación de la educación
Issue Date: 2017
Publisher: 1451-7485
Journal: Sport Mont 
Abstract: The purpose of this study was to determine the influence of the two new rules tested at the inaugural U23 Men’s Volleyball World Championship (21-point set excluding the fifth set, and 15 seconds between rallies–10 seconds from the finished point until the referee’s whistle for serve and five seconds for performing the serve) on number and types of jumps and number of contacts and hits. The analysis comprised 25,930 jumps (an essential physical activity for volleyball), 15,706 contacts and 10,224 hits during 36 matches played by 144 males aged under 23 at the first Under 23 Men’s World Championships organized in Uberlandia, Brazil, in 2013. Two investigations were conducted: 1) Analysis of jumps by Jump type, In-game role and Level of set win; 2) Analysis of contacts (reception, setting, block, defense) and hits (serve and attack) by Type, In-game role and Set outcome. Significant differences (p=0.000) were found between in-game role and jump type, as Middle blocker performed the most (34.7%), followed by Outside hitter (24.9%), Setter (24.6%) and Opposite (15.8%). Significant differences were found for number and types of Hits between set Winner and Loser teams only for serves by Setter (p<0.001) and Middle blocker (p<0.05). The results showed major differences in jumps, hits and contacts between in-game roles: Middle blocker was the most frequent jumping position, followed by Outside hitter and Setter. The Libero showed a new tendency of being Setter with a jump after the initial Setter defense.
ISSN: 1451-7485
DOI: 10.26773/smj.2017.10.002
Source: Sport Mont[ISSN 1451-7485],v. 15, p. 9-16
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