KINEMATIC AND KINETIC EVALUATION OF JUMP-LANDING TASK IN VOLLEYBALL DEFENSE: IMPLICATIONS FOR ACL INJURY RISK ASSESSMENT.
The aim of this study was to evaluate the biomechanics of jumping and landing in defense between beginner and professional volleyball players. 10 professional volleyball players from Iranian leagues and 10 beginners with less than 2 years of training experience participated in this study. Selected k...
| Publicado en: | Kinesiologia Slovenica Vol. 28; no. 1; pp. 141 - 156 |
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| Autores principales: | , , , |
| Formato: | research tables/charts Journal Article |
| Publicado: |
Faculty of Sport
2022
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| Acceso en línea: | Ver este registro en EBSCOhost |
| Sumario: | The aim of this study was to evaluate the biomechanics of jumping and landing in defense between beginner and professional volleyball players. 10 professional volleyball players from Iranian leagues and 10 beginners with less than 2 years of training experience participated in this study. Selected kinetic and kinematic variables in jump and landing movement in 5 tasks of volleyball defense was analyzed. There were no significant differences between beginners and professional groups in different types of jumping and landing in the phase of preparation, jumping and landing in the variables of ground reaction force in different directions except the variable YP1 in the side stepping to the left (P = 0.029) and loading rate. The results also showed that the knee flexion angle at the moment of landing in all jumps was significantly higher in professional volleyball players than in the beginner group. The difference between the groups in maximum knee flexion in the landing phase was also significant in all jumps except the side stepping to the left (p <0.05). Professional volleyball players have a lower risk of ACL injury than beginner volleyball players. As a result, to reduce the risk of ACL injury in beginners, it is necessary to pay attention to landing exercises and focus on increasing the flexion angle. Namen te študije je bil ovrednotiti biomehaniko skokov in doskokov v obrambi med začetniki in profesionalnimi odbojkarji. V raziskavi je sodelovalo 10 profesionalnih odbojkarjev iz iranskih lig in 10 začetnikov z manj kot 2 leti izkušenj Z ODBOJKARSKIM treningom. Analizirane so bile izbrane kinetične in kinematične spremenljivke pri skoku in doskoku pri 5 nalogah odbojkarske obrambe. Med začetniškimi in profesionalnimi skupinami pri različnih vrstah skokov in doskokov v fazi priprav, skokov in doskokov v spremenljivkah sile reakcije tal v različnih smereh ni bilo UGOTOVLJENIH ZNAČILNIH razlik (P = 0,029). Rezultati so tudi pokazali, da je bil kot upogiba kolena v trenutku doskoka pri vseh skokih bistveno večji pri profesionalnih odbojkarjih kot v začetni skupini. Razlika med skupinama v maksimalni fleksiji kolena v fazi doskoka je bila pomembna tudi pri vseh skokih razen pri bočnem koraku v levo (p <0,05). Profesionalni odbojkarji imajo manjše tveganje za poškodbe ACL kot odbojkarji začetniki. zA zmanjšanje tveganja za poškodbe ACL pri začetnikih posvetiti pozornost pristajalnim vajam in se osredotočiti na povečanje upogibnega kota. |
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