Title Analiza povezanosti explozivne snage tipa bacanja stiska šake i fleksibilnosti ramenog pojasa s bzinomS servisa u tenisu Title (english) Examining the correlation between explosive power throw hand grip and shoulder girdle flexibility with tennis serve speed Author Paola Martić Mentor Petar Barbaros (mentor)Committee member Petar Barbaros (predsjednik povjerenstva)Committee member Dario Novak (član povjerenstva)Committee member Damir Knjaz (član povjerenstva)Granter University of Zagreb Defense date and country 2023-09-26, Croatia Scientific / art field, SOCIAL SCIENCES Abstract Servis u tenisu zahtijeva precizan prijenos energije kako bi se postigla maksimalna brzina udarca, a budući da je to jedini udarac koji igrač samostalno pokreće, ključno je analizirati karakteristike koje doprinose uspješnosti servisa. Cilj ovog istraživanja je utvrditi povezanost eksplozivne snage tipa bacanja, stiska šake i fleksibilnosti ramenog pojasa s brzinom servisa kod tenisačica te identificirati i oblikovati regresijski model koji učinkovito predviđa brzinu servisa na temelju povezanosti navedenih varijabli. Uzorak ispitanika u ovom istraživanju 20 je tenisača prosječne dobi 13,10 ± 0,74 godina, tjelesne visine 165,70 ± 4,90 cm i tjelesne mase 51,45 ± 5,84 kg. Za procjenu motoričkih sposobnosti gornjih ekstremiteta tenisačica koristila su se četiri testa za procjenu eksplozivne snage tipa bacanja (bacanje medicinke naprijed preko glave, bacanje medicinke unatrag preko glave, bacanje medicinke u stilu bacanja kugle, bacanje medicinke iz sjedećeg položaja), jedan test za procjenu jakosti mišića šake i podlaktice (dinamometrija stiska šake), jedan test za procjenu fleksibilnost ruku i ramenog pojasa (iskret
palicom) te je provedena analiza povezanosti tih testova s brzinom servisa. Od svih analiziranih varijabli, bacanje medicinke naprijed preko glave - OMBT (r = 0,70), bacanje medicinke u stilu bacanja kugle - MBTSP (r = 0,75) i dinamometrija stiska šake - GS (r = 0,71) imali su izrazitu povezanost s brzinom servisa (p < 0.05). Rezultati višestruke regresijske analize ukazali su da kombinacija odabranih prediktora (MBTSP - bacanjem medicinke u stilu bacanja kugle, GS - dinamometrijom stiska šake i OMBT - bacanjem medicinke naprijed preko glave) objašnjava 75% varijance brzine servisa, pri čemu je MBTSP bila ključna varijabla prediktivnog modela i sama je objasnila 51% varijance brzine servisa. Postizanje veće brzine servisa ovisi o više čimbenika, pri čemu je posebno važna jakost, snaga i fleksibilnost gornjeg dijela tijela kod mladih igrača koji teže poboljšanju svojeg početnog udarca. Zaključak ovog istraživanja naglašava važnost razvoja motoričkih sposobnosti mladih tenisačica kako bi unaprijedile svoju tehniku servisa i postigle veću brzinu udarca.
Abstract (english) Tennis service requires precise transfer of energy to achieve maximum racket speed, and since it is the only stroke that a player initiates independently, it is crucial to analyze the characteristics that contribute to its success. The aim of this study is to determine the correlation between explosive power throw, hand grip strength and shoulder girdle flexibility with the serve speed in female tennis players, as well as to identify and construct a regression model that effectively predicts the serve speed based on the relationship among these variables. The sample of participants in this study consists of 20 tennis players with an average age of 13.10 ± 0.74 years, a height of 165.70 ± 4.90 cm, and a weight of 51.45 ± 5.84 kg. To evaluate the motor skills of the upper extremities in female tennis players, four tests aimed at measuring explosive throwing capabilities (forward overhead medicine ball throw, backward overhead medicine ball throw, medicine ball throw shot put, seated medicine ball throw), hand and forearm muscle strength (handgrip dynamometry), and flexibility of the hands and shoulder girdle (twit with the stick). Among all analyzed variables, the overhead medicine ball throw (OMBT) (r = 0.70), medicine ball throw shot put (MBTSP) (r = 0.75) and grip strength (GS) (r = 0.71) exhibited a significant correlation with serve speed (p < 0.05). The results of multiple regression analysis indicated that the combination of selected predictors (MBTSP - medicine ball throw shot put, GS - grip strength and OMBT - overhead medicine ball throw) accounted for 75% of the variance in serve speed, with MBTSP emerging as the key predictor, explaining 51% of the serve speed variance alone. Achieving a higher service speed depends on various factors, with particular emphasis on the strength, power, and flexibility of the upper body in young players who aim to improve their initial shot. The conclusion of this research underscores the significance of developing the motor skills of young female tennis players to enhance their serving technique and achieve greater shot speed.
Keywords
tenis
servis
brzina servisa
motoričke sposobnosti
tenisačice
Keywords (english)
tennis
serve
serve velocity
motor abilities
female tennis players
Language croatian URN:NBN urn:nbn:hr:117:114549 Study programme Title: Kinesiology; specializations in: Kinesiology in Education and Track-and-Field, Kinesiology in Education and Fitness, Kinesiology in Education and Wrestling, Kinesiology in Education and Sailing, Kinesiology in Education and Windsurfing, Kinesiology in Education and Judo, Kinesiology in Education and Kayaking, Kinesiology in Education and Kinesiological Recreation, Kinesiology in Education and Kinesitherapy, Kinesiology in Education and Physical Conditioning of Athletes, Kinesiology in Education and Basketball, Kinesiology in Education and Football, Kinesiology in Education and Volleyball, Kinesiology in Education and Basic Kinesiological Transformations, Kinesiology in Education and Dancing, Kinesiology in Education and Swimming, Kinesiology in Education and Rhythmic Gymnastics, Kinesiology in Education and Handball, Kinesiology in Education and Skiing, Kinesiology in Education and Artistic Gymnastics, Kinesiology in Education and Management of Sport, Kinesiology in Education and Tennis, Kinesiology in Education and Rowing Type of resource Text File origin Born digital Access conditions Access restricted to students and staff of home institution Terms of use Created on 2023-09-29 10:25:41
