Analiza povezanosti izbranih spremenljivk odrivne moči smučarjev skakalcev in smučark skakalk

Modic, Andraž (author), Jošt, Bojan (mentor), Štirn, Igor (comentor)

Namen magistrskega dela je bil usmerjen na ugotavljanje strukture odrivne moči pri smučarskih skakalcih in skakalkah. V raziskavo je bilo vključenih 104 smučarjev skakalcev in smučark skakalk, od tega je bilo 83 smučarjev skakalcev in 21 smučark skakalk. V vzorcu merjencev so bili skakalci in skakalke starejši od 15 let. Meritve so bile izvedene v oktobru 2022 na Fakulteti za šport. Merjenci so v poljubnem vrstnem redu izvedli vertikalni odskok na tenziometrijski plošči, pri čemer je bilo izmerjenih 6 spremenljivk (čas vertikalnega odskoka, maksimalni pospešek prvega dela odriva pri vertikalnem odskoku, maksimalni pospešek drugega dela odriva pri vertikalnem odskoku, povprečni pospešek prvega dela odriva pri vertikalnem odskoku, povprečni pospešek drugega dela odriva pri vertikalnem odskoku, višina vertikalnega odskoka), potisk v zaletnem položaju na posebni napravi, pri katerem so bile izmerjene 4 spremenljivke (maksimalna izometrična sila potiska v zaletnem položaju v času 0,2 sekunde, maksimalna izometrična sila potiska v zaletnem položaju, relativna maksimalna izometrična sila potiska v zaletnem položaju glede na telesno težo v času 0,2 sekunde, relativna maksimalna izometrična sila potiska v zaletnem položaju glede na telesno težo), troskok z mesta, skok v daljino z mesta in preskok švedske klopi. Izmerjene so bile 3 morfološke značilnosti (indeks telesne mase, telesna višina in telesna teža) in starost. Rezultati povezanosti med posameznimi spremenljivkami odrivne moči so bili statistično značilni in visoki. Prav tako je bila ugotovljena povezanost med starostjo in izbranimi spremenljivkami odrivne moči ter med morfološkimi značilnostmi in izbranimi spremenljivkami odrivne moči. Rezultati faktorske analize so razkrili 4 značilne skupne faktorje (lastna vrednost je bila višja od 1), s katerimi je moč pojasniti 84,5 % celotne variance 13 spremenljivk odrivne moči: (1) faktor osnovne skočne moči, (2) faktor eksplozivne moči odriva, (3) faktor eksplozivne moči v izometričnih pogojih in (4) faktor odrivne sile v v drugem delu vertikalnega odriva.

• Language: Slovenian
• Keywords: smučarski skoki, odrivna moč, povezanost, testiranje, odskok
• Work type: Master's thesis/paper
• Organization: FŠ - Faculty of Sport
• Year: 2023
• PID: 20.500.12556/RUL-150580
• Publication date in RUL: 21.09.2023

Secondary language

• Language: English
• Title: Analysis of the correlation between selected variables of ski jumpers push off power

Abstract

The purpose of the master thesis was focused on determining the structure of take-off force in male and female ski jumpers. The study included 104 ski jumpers, consisting of 83 male jumpers and 21 female jumpers. The participants in the sample were aged 15 and above. The measurements were conducted in October 2022 at the Faculty of Sports. The subjects performed vertical jumps on a force plate, and six variables were measured (take-off time, maximum take-off acceleration in the first half of the take-off time, maximum take-off acceleration in the second half of the take-off time, average push-off acceleration in the first half of the take-off time, average take-off acceleration in the second half of the take-off time and take-off height). In addition, four variables of isometric take-off power in a squatting position were tested with a special measuring device (maximum isometric push-off power in 0,2 seconds, maximum isometric push-off power, relative maximum isometric push-off power in 0,2 seconds relative to body weight, relative maximum isometric push-off power relative to body weight). Other tests included standing long jump, standing triple jump, and hurdle jump. Three morphological characteristics (body mass index, body height, and body weight) as well as age were also measured. The results showed statistically significant and high correlations between the selected variables of take-off power. Furthermore, correlations were found between age and the selected variables of take-off power, as well as between morphological characteristics and the selected variables of take-off power. Factor analysis revealed four significant common factors (with eigenvalues higher than 1), which accounted for 84,5 % of the total variance of the 13 take-off power variables: 1. Basic jumping power factor, 2. The explosive take-off power factor, 3. Explosive take-off power factor in isometric conditions, and 4. The take-off power factor in the second half of the take-off time.

• Keywords: ski jumping, correlation, take-off, testing, take off power