Over the last decade, significant advances have been made in the study and understanding of movement mechanics. Much of this may be attributed to the use of more sophisticated technology to improve our ability to assess the human body in real-time athletics. As a consequence of these advances, our understanding of the pathophysiology of injury has also increased. New insight into playing forces during complex actions as the throwing motion allowed us to develop better protocols for the prevention and treatment of the most common injuries. In the present paper we used motion analyses with a specific aim: analyzing the technique in the attack strike in volleyball for the upper limb and obtaining motion-specific parameters for this specific movement, with special consideration on the overhead throwing, lead to elaboration of a biomechanical model. Using of the proposed model for identification of the mechanisms that predispose to injury in terms of biomechanics can lead to improvement of technique and decrease of injuries. In this way the methodology of training must be continuously developed, considering the achievements of modern physiology and biomechanics of sport activity. Methods: The experimental research was carried on a group of 12 senior women volleyball players, components of the volleyball team of the University of Craiova Club, during july 2006- june 2007. The measurements were focused on goniometry (evaluation of movements for the glenohumetal joint); dynamometry (force iindexes for shoulder and palm); cimematics measurements (joint angles) and kinetic measurements (muscular forces). Data were recorded by using the movement analysis system 3D "Simi Motion", the scanning and equilibrium system "RSSCAN and force platform Kistler "AMTI". Interpretation and synthetis of data were performed by using the Footscan Scientific and Anybody software. Results: The date initially obtained by SIMI, RSSCAN and AMTI were used as in-put data for the Anybody system. In the present study the "Anybody" software permitted the evaluation of the shoulder and knee muscular forces during the strike attack in volleyball, based on the feed-back dynamics (knowing the limb trajectories we can identify the muscular forces) and direct comparation of the obtained values in the initial and final testing. Due to this software we calculated the muscular forces, reactional and joint moments, reconstructing the movement for the implemented models by using the markers coordinates and the values of the contact presure and forces for the weight center and obtaining an computerized model of the strike attack in volleyball with individualisation possibilities for each player. Conclusions: The new modalities in approaching the biomechanical analysis in high level sports by complex computerised techniques, offer the possibility for analysing the cinematic and dynamic properties of movements and to elaborate scientific models that simulate and realise predictions in a various range of movements. Elaboration of the original tridimensional musculoskeletal model permitted behavioural simulation for the lower and upper limb during the strike attack in volleyball and data collection regarding biomechanical conditions that encourage trauma production in volleyball players.
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