Vrednost sile in hitrosti pri različnih teniških udarcih : magistrsko delo

Zajc, Luka (author), Filipčič, Aleš (mentor), Kugovnik, Otmar (comentor)

Tenis je v Sloveniji v zadnjih dvajsetih letih postal eden najbolj priljubljenih rekreativnih športov. Je dinamična igra, pri kateri si igralci izberejo različne strategije, kako se čimbolj približati zmagi. Dandanes so nam v pomoč pri načrtovanju različnih strategijah tudi številne tehnološke naprave za merjenje parametrov udarcev pri tenisu. Tehnologija pokriva zelo različna področja v športu in posledično tudi v tenisu, s čimer nam pomaga pri doseganju željenih rezultatov. Namen magistrske naloge je ugotoviti povezanost hitrosti zapestja in sile, ki se pojavlja v zapestju med izvajanjem servisa, forhenda in bekenda, ter najvišjo hitrostjo udarjene žoge. Meritve smo izvajali na osmih teniških igralcih moškega in ženskega spola, katerim smo merili hitrost in silo različnih udarcev. Merjenci so igrali diagonale, med meritvami pa je posamezni igralec imel na zapestju merilno napravo Armbeep. Vsak merjenec je izvedel 60 udarcev forhenda in bekenda ter 30 servisov iz desne strani in 30 iz leve strani. Ugotovitve razlik med hitrostjo in silo med različnimi udarci smo preverili s pomočjo enofaktorske analize variance, razlike med udarci pa smo preverjali s Post Hoc testom Tamhane.Za preverjanje povezanosti smo uporabljali Pearsonov koeficient korelacije. Odvisnost med spremenljivkami smo preverjali z regresijsko analizo. Rezultati so pokazali, da pri različnih teniških udarcih (forhend, bekend in servis) obstajajo statistično značilne razlike v hitrosti in sili. Pri analizi hitrosti smo opazili, da je najvišjo hitrost dosegel servis, medtem ko sta forhend in bekend imela podobni vrednosti. Iste ugotovitve smo opazili tudi pri sili, kjer je servis prav tako dosegel največjo silo, forhend in bekend pa sta imela ponovno podobno vrednost. Dokazali smo povezanost med hitrostjo zapestja med udarcem in hitrostjo žoge po udarcu, prav tako smo dokazali povezanost med silo med udarcem in hitrostjo žoge po udarcu.

• Language: Slovenian
• Keywords: hitrost, sila
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FŠ - Faculty of Sport
• Year: 2018
• PID: 20.500.12556/RUL-101989
• COBISS.SI-ID: 5358769
• Publication date in RUL: 19.07.2018

Secondary language

• Language: English
• Title: Value of force and speed in different tennis strokes

Abstract

In Slovenia tennis has become one of the most popular recreational sports in the last twenty years. It's a dynamic game where players can choose a variety of strategies to win more matches. Nowadays, many technological devices can help us in effective planning and reaching goals. The purpose of the seminar is to to determine the correlation between the velocity of the wrist and the force occurring in the wrist during service, forhenda and bekend, and the highest velocity of the ball that was hit. We measured 8 tennis players, boys and girls. The measured players played diagonals and one of the players had the Armbeep measuring device on the wrist. Each player performed 60 forehand and 60 backhand, then 30 services from the right and 30 services from the left. To determine the differences between the velocity and forces during various strikes, we verified with a one-way variance analysis, and the difference between strikes was checked by the post hoc Tamhane test. To verify the relationship, we used the Pearson coefficient of correlation. Dependence between the variables was checked by regression analysis. The results showed that for various tennis strikes (forehand, backhand and serve) there are statistically significant differences in speed and force. In the speed analysis, we noticed that the highest speed was reached by the service. Forehand and backhand had similar outcome. Similar results also occurred with force, where the service reached the largest force, forehand and backhand were also similar. We proved the correlation between the velocity of the wrist during the impact and the velocity of the ball after the impact, we also proved the correlation between the force on the wristand the velocity of the ball after the impact.

• Keywords: speed, force