Zanesljivost poenostavljene dvodimenzionalne kinematične analize tehnične izvedbe enonožnih skokov : magistrsko delo

Ribič, Ažbe (author), Pori, Primož (mentor), Spudić, Darjan (comentor)

Namen magistrske naloge je bil predstaviti poenostavljene metode 2D kinematične analize, hkrati pa preveriti znotrajobiskovno zanesljivost spremenljivk, pridobljenih z omenjeno metodo. V raziskavo je bilo vključenih 80 profesionalnih športnikov (starost 21,8 ± 3,9 leta; telesna masa 92 kg ± 9,6 kg; telesna višina 189,8 ± 5,6 cm). Protokol meritev je obsegal šest enonožnih skokov z nasprotnim gibanjem (CMJ), šest enonožnih skokov v daljino (SVD) in šest enonožnih pristankov (EP), po tri z vsako nogo. Tehnična izvedba testov je bila posneta z visokofrekvenčnimi kamerami v bočni in frontalni ravnini. Kinematična analiza pa je bila opravljena s prostodostopnim programom Kinovea. Glavne ugotovitve naše raziskave so, da je zanesljivost postavljanja markerjev in določanja ključnega položaja ne glede na test, ravnino gibanja, nogo in način določanja ključnega položaja po meri relativne zanesljivosti, ki jo predstavlja interklasni korelacijski koeficient (ICC), in absolutne zanesljivosti, ki jo predstavlja koeficient variance (CV), v predpostavljenih mejah (ICC = 0,8-1; CV < 10 %). Po kriteriju ICC smo ugotovili dobro do odlično zanesljivost spremenljivk pri testu EP ne glede na ravnino gibanja tako pri dominantni kot nedominantni nogi. Pri testu CMJ smo ugotovili podobne rezultate, in sicer srednjo do dobro zanesljivost po kriteriju ICC tako za dominantno kot nedominantno nogo ne glede na ravnino gibanja. Zanesljivost spremenljivk pri testu SVD je tako za odriv kot pristanek ne glede na ravnino in nogo slaba do srednja. Ne glede na test pa smo ugotovili vsaj zelo dobro (EP in CMJ) in sprejemljivo (SVD) absolutno zanesljivost. Trdimo lahko, da je 2D kinematična analiza EP dovolj zanesljiva metoda, da jo uporabljamo v namene kinematične analize tako v športni kot klinični praksi. Rezultati spremenljivk testov CMJ in SVD pa ne dosegajo dovoljšne zanesljivosti, da bi lahko verodostojno trdili, da je njihova uporaba v praksi mogoča. Poleg tega je treba upoštevati, da med subjektivnim in objektivnim določanjem ključnega položaja obstajajo statistično značilne razlike, ne glede na to, da obstajajo statistično značilne povezave pri večini spremenljivk treh testov. To nam pove, da je pri izbiri načina kinematične analize potrebna konsistentnost ter pri odčitavanju in analizi podatkov ter sami interpretaciji dodatna pozornost in kritična presoja

• Language: Slovenian
• Keywords: Tehnična izvedba skoka, kinematična analiza, zanesljivost, enonožni skok, enonožni pristanek
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FŠ - Faculty of Sport
• Year: 2024
• PID: 20.500.12556/RUL-155121
• COBISS.SI-ID: 196204035
• Publication date in RUL: 21.03.2024

Secondary language

• Language: English
• Title: Reliability of a simplified two-dimensional kinematic analysis of thecnical execution in single-leg jumps

Abstract

The purpose of the master's thesis was to present a simplified method for 2D kinematic analysis while simultaneously verifying the reliability of variables obtained using the mentioned method. The study included 80 professional athletes (mean age 21.8 ± 3.9 years; body mass 92 kg ± 9.6 kg; height 189.8 ± 5.6 cm). The measurement protocol included six single leg counter-movement jumps (CMJ), six single-leg horizontal jumps (SVD) and six single-leg landings (EP), three with each leg. Technical execution of the tests was recorded with high-frequency cameras in the lateral and frontal planes. Kinematic analysis was conducted using the freely available software Kinovea. The main findings of our research are that the reliability of marker placement and determining the key position, regardless of the test, plane of movement, leg, and method of determining the key position, meets the criteria of relative reliability represented by the intraclass correlation coefficient (ICC) and absolute reliability represented by the coefficient of variation (CV) within assumed limits (ICC = 0.8-1; CV < 10%). According to the ICC criterion, we found good to excellent reliability of variables in the EP test, regardless of the plane of movement, for both dominant and non-dominant legs. In the CMJ test, we found similar results, with moderate to good reliability by the ICC criterion for both dominant and non-dominant legs, regardless of the plane of movement. The reliability of variables in the SVD test, both for takeoff and landing, is poor to moderate, regardless of the plane and leg. Regardless of the test, we found at least very good (EP and CMJ) and acceptable (SVD) absolute reliability. We can argue that 2D kinematic analysis of EP is reliable enough to be used for kinematic analysis purposes in both sports and clinical practice. However, the results of CMJ and SVD test variables do not achieve sufficient reliability to credibly claim their practical use. Additionally, it is important to consider that there are statistically significant differences between subjective and objective determination of the key position, despite the statistically significant correlations in most variables of the three tests. This suggests that consistency is required in choosing the method of kinematic analysis, and additional attention and critical judgment are needed in reading, analyzing data, and interpreting the results.

• Keywords: Technical performance of jump, kinematic analysis, reliability, single leg jump, single leg land