Utjecaj maksimalnih izometričkih predopterećenja na manifestaciju eksplozivne jakosti tipa skoka u mladih nogometaša

master's thesis

• Title (english): Influence of maximal isometric preload on vertical jump explosiveness in young soccer players
• Author: Denis Pudja
• Mentor: Igor Jukić (mentor)
• Committee member: Igor Jukić (predsjednik povjerenstva)
• Committee member: Mario Baić (član povjerenstva)
• Committee member: Luka Milanović (član povjerenstva)
• Committee member: Valentin Barišić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Kinesiology; (Department of Kinesiology of Sport); Zagreb
• Defense date and country: 2015-06-10, Croatia
• Scientific / art field, discipline and subdiscipline: SOCIAL SCIENCES; Kinesiology; Sports Kinesiology

Abstract

Cilj ovoga rada bio je utvrditi utjecaj predopterećenja maksimalnim voljnim izometričkim
kontrakcijama (engl. Maximal isometric voluntary contraction - MVIC) na naknadne
eksplozivne aktivnosti tipa skoka. Uzorak se sastojao od dvije grupe mlađih vrhunskih
nogometaša - kadeta (16.2 godina, 177.6 cm, 69.7 kg) i juniora (17.7 godina, 179.7 cm, 73.4
kg). Grupe su provodile različite protokole kojima je zajedničko bilo predopterećenje (PO)
maksimalnim izometričkim potiskom nogu i naknadni Sargent test. Razlike su se odnosile na
trajanje predopterećenja (kadeti - MVIC od 3 x 3 sekunde; juniori - MVIC od 1 x 6 sekundi)
te trajanje odmora nakon PO-a i konkretnu varijantu Sargent testa (kadeti - vertikalni skok s
pripremom 4 min nakon PO-a; juniori - vertikalni skok iz čučnja 2 min nakon PO-a). U
eksperimentalnoj grupi kadeta zabilježen je statistički značajan pad rezultata nakon primjene
PO-a, a u grupi juniora nisu evidentirane nikakve značajne promjene. Stoga je zaključak kako
primijenjeni protokol ne odgovara ispitanoj populaciji u potenciranju eksplozivne jakosti tipa
skoka.

Abstract (english)

The goal of the present thesis was to determine the effects of a conditioning activity (CA)
which included maximal voluntary isometric contractions (MVIC) on explosive jumps. The
sample included two groups of adolescent male soccer players - a younger group (16.2 years,
177.6 cm, 69.7 kg) and a older group (17.7 years, 179.7 cm, 73.4 kg). The groups performed
two different protocols whereas both included a leg press type conditioning activity followed
by a variation of Sargent test. The differences referred to the duration of the CA (younger
group - MVIC 3 x 3 seconds; older group - MVIC 1 x 6 seconds) and on the rest duration
after the CA and the specific variation of the Sargent test (younger group - countermovement
jump 4 min after CA; older group - squat jump 2 min after CA). In the younger group a
statistically significant decrease of performance was observed, whereas in the older groups no
significant changes where registered. Hence, the conclusion is that the given protocol for the
investigated population isn't appropriate for enhancing vertical jump performance.

• Keywords: postaktivacijska potencijacija; izometrija; eksplozivna jakost
• Keywords (english): postactivation potentiation; isometrics; explosive strength
• Language: croatian
• URN:NBN: urn:nbn:hr:117:542193
• Study programme: Title: Integrated undergraduate and graduate university study of kinesiology; Study programme type: university; Study level: integrated undergraduate and graduate; Academic / professional title: magistar / magistra kineziologije (magistar / magistra kineziologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2015-12-09 07:38:59