Primerjava sile reakcije podlage pri potegu pri boljših in slabših dvigalcih : magistrska naloga

Gaber, Luka (author), Štirn, Igor (mentor)

Olimpijsko dviganje uteži je samostojen olimpijski šport, pri katerem dvigalci uteži tekmujejo v dveh disciplinah: v potegu in sunku. Poteg je disciplina, pri kateri dvigalec dvigne ročko od tal nad glavo v enem neprekinjenem gibu s širokim prijemom. Pri potegu prihaja do delovanja različnih sil bodisi na olimpijsko ročko bodisi na naše telo. V naši raziskavi smo se odločili, da si podrobno ogledamo navpično komponento sile reakcije podlage, ki deluje nasprotno od dvigalčevega potiska v tla po 3. Newtonovem zakonu. Namen dela je bilo primerjati silo reakcije podlage pri potegu pri boljših in slabših dvigalcih. Pri tem smo si izbrali breme 80 % 1 RM potega. Opazovali smo obliko grafa in različne parametre. Rezultati večinoma potrjujejo dva različna tipa krivulje, ki sta značilna za boljši in slabši tip dvigalca. Značilne razlike med skupinama smo opazili pri sili prvega vrha prvega vlečenja in tretjega vrha drugega vlečenja glede na telesno težo dvigalca. Pri povprečnem naklonu prvega vlečenja smo opazili statistično značilne razlike, medtem ko pri najbolj pričakovanih razlikah pri drugem vlečenju ni bilo značilnih razlik. Takšno obliko analize priporočamo trenerjem olimpijskega dviganja, saj lahko z grafom sile reakcije podlage pojasnjujejo šibke in močne odseke dviga pri vsakem dvigalcu posebej. Iz obliki grafa je namreč dobro razvidno, kje so pomanjkljivosti.

• Language: Slovenian
• Keywords: sila reakcije podlage, poteg, olimpijsko dviganje uteži, maksimalna moč, dvigalci uteži
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FŠ - Faculty of Sport
• Year: 2018
• PID: 20.500.12556/RUL-103695
• COBISS.SI-ID: 5416625
• Publication date in RUL: 23.09.2018

Secondary language

• Language: English
• Title: Comparison of ground reaction force during snatch at good and bad olympic weightlifters

Abstract

Olympic weightlifting is a stand-alone Olympic sport where lifters compete in two exercises: snatch and clean and jerk. The snatch is a discipline in which the lifter lifts the bar from the ground above the head in one single motion with a wide grip. In the course of the process there are various forces acting either on the weightliting bar or on our body. In our study we decided to observe the vertical component of the ground reaction force which works opposite of the lifter's thrust into the ground according to the 3rd Newton law. The purpose of this master thesis was to compare ground reaction force of two different groups of lifters based on experince: good and bad. In this case we selected the load of 80% of 1RM. We observed a differentiation according to the shape of the graph and various parameters. The results are confirmed mainly by two different types of curves which are typical for better and worse type of lifters. Significant differences between groups were observed in the first peak of the first pull and the third peak of the second pull based on total force and bodyweight ratio. At the average inclination of force development of the first pull, statistically significent differences were observed while the most expected differences in the second pull did not have any significant differences. We recommend this type of analysis to the olympic lifters as they can explain the weak and strong sections within each lift based on ground reation force. Based on shape of the graph we can point out techincal anomalies of the specifc lifter.

• Keywords: ground reaction force, snatch, olympic weightlifting, maximal strength, olympic weightlifters