Trend promjena rezultata u testovima skok s pripremom i skok bez pripreme u nogometaša mlađih dobnih kategorija

master's thesis

• Title (english): Trend of result changes in squat jump and countermovement jump in young soccer players
• Author: Dora Vajdić
• Mentor: Luka Milanović (mentor)
• Committee member: Luka Milanović (predsjednik povjerenstva)
• Committee member: Vlatko Vučetić (član povjerenstva)
• Committee member: Valentin Barišić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Kinesiology; Zagreb
• Defense date and country: 2017-09-19, Croatia
• Scientific / art field, discipline and subdiscipline: SOCIAL SCIENCES; Kinesiology

Abstract

Cilj ovog rada bio je utvrditi promjene u odnosima rezultata u testovima skok bez pripreme i skok sa pripremom unutar različitih dobnih skupina nogometaša. Uzorak se sastojao od četiri skupine ispitanika - mlađi pioniri (11.6 godina, 154.1 cm, 44.2 kg), pioniri (13.5 godina, 169.76 cm, 57.7 kg), kadeti (15.5 godina, 177.4 cm, 67.9 kg) i juniori (17.3 godina, 178.7 cm, 70.2 kg). Mjereni su im rezultati u skoku bez pripreme (engl. Squat Jump - SJ) zatim i u skoku s pripremom (engl. Countermovement Jump - CMJ) te su promatrani odnosi između tih skokova, gdje je očekivano da će skok s pripremom dati bolje rezultate, zbog iskorištavanja ciklusa istezanja i skraćivanja (engl. Stretch-shortening cycle - SSC). Također, očekivano je kako će skupina juniora pokazati najveću razliku između dva skoka zbog višeg stupnja sazrijevanja. Rezultati istraživanja potvrdili su hipotezu te je utvrđeno postojanje statistički značajne razlike između SJ i CMJ samo u skupini juniora, što je potvrdilo i izračunavanje pokazatelja sposobnosti iskorištavanja SSC-a, koje je također dalo najveći postotak razlike između dva skoka u toj skupini. Na kraju, može se zaključiti kako postoji trend porasta u vrijednostima testova vertikalne skočnosti u nogometaša mlađih dobnih kategorija sličnog iskustva u treningu jakosti i pliometrije/eksplozivne jakosti, gdje stariji pokazuju veće rezultate i bolju sposobnost iskorištavanja SSC-a od mlađih, što se može prepisati višem stupnju sazrijevanja.

Abstract (english)

The goal of the present thesis was to determine changes in relation of squat jump and countermovement jump in different age groups of young soccer players. The sample included four different age groups of young soccer players – U12 (11.6 years, 154.1 cm, 44.2 kg), U14 (13.5 years, 169.76 cm, 57.7 kg), U16 (15.5 years, 177.4 cm, 67.9 kg) and U18 (17.3 years, 178.7 cm, 70.2 kg). The groups got tested in squat jump and countermovement jump, and the relation of the two jumps was observed. It was expected that the countermovement jump will give higher scores because of the use of the stretch shortening cycle and also that the U18 group will show the biggest difference in the two tests performed because of their maturation level. Results of the experiment confirmed the hypothesis and showed the existance of statistical significant change between CMJ and SJ only in the U18 group, aswell as the calculation of the measure of stretch-shortening ability which showed the biggest percentage of difference between two tests in the same group. Hence, the conclusion is that there is a trend of increase in results in vertical jump height tests in young soccer players of different age groups that have a similar experience in strength and plyometric type of training, where the older show higher scores and better stretch-shortening cycle ability than the younger ones, possibly because of their maturation level.

• Keywords: ciklus istezanja i skraćivanja; pliometrija; eksplozivna jakost; mladi sportaši; skok s pripremom; skok bez pripreme; rast i razvoj
• Keywords (english): stretch-shoretning cycle; plyometrics; explosive strength; youth athletes; countermovement jump; squat jump; maturation
• Language: croatian
• URN:NBN: urn:nbn:hr:117:109983
• 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: 2017-09-19 11:14:28