Επιστημονικά περιοδικά

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Επιστημονικά περιοδικά

 

 

Biomechanics

Journal of biomechanics

 

Ανάλυση με βιντεοκάμερες το σουτ το Ronaldo

in Εμβιομηχανική (Βίντεο)

Συνδεσμοπλαστική πρόσθιου χιαστού (Βίντεο)

in Εμβιομηχανική (Βίντεο)

Ποιός κλωτσάει πιο γρήγορα; (Βίντεο)

in Εμβιομηχανική (Βίντεο)

Το κάρφωμα στο μπάσκετ – ανάλυση! (Βίντεο)

in Εμβιομηχανική (Βίντεο)

Αθλητική Επιστήμη – Καλαθοσφαίριση

in Εμβιομηχανική (Βίντεο)

Ανακοίνωση για τις Εξετάσεις της Εμβιομηχανικής 2012

in Featured, Χωρίς κατηγορία

Προς όλους τους Φοιτητές του ΤΕΦΑΑ Σερρών που χρωστούν το μάθημα της Βιομηχανικής

 

Διαβάστε το συννημένο αρχείο: ΑΝΑΚΟΙΝΩΣΗ_ΥΛΗΣ_ΒΙΟΜΗΧΑΝΙΚΗ_ΙΟΥΝΙΟΣ_2012 (pdf)

Nature: Greek science on the brink

in Χωρίς κατηγορία

 

Read the following article in Nature to understand the conditions under which researchers work in Greece:

 

Greek science on the brink

 

Financial woes spur controversial reforms of the country’s research system.

http://www.nature.com/news/greek-science-on-the-brink-1.9781

 

Ποιοί μηχανικοί παράγοντες επηρεάζουν το σούτ στο ποδόσφαιρο; Ανασκόπηση

in Ποδόσφαιρο

BIOMECHANICAL CHARACTERISTICS AND DETERMINANTS OF INSTEP SOCCER KICK 
Eleftherios Kellis and Athanasios Katis
June 2007 – Volume 6, Issue 2, 154-165

© Journal of Sports Science and Medicine (2007) 6, 154 – 165

Good kicking technique is an important aspect of a soccer player. Therefore, understanding the biomechanics of soccer kicking is particularly important for guiding and monitoring the training process. The purpose of this review was to examine latest research findings on biomechanics of soccer kick performance and identify weaknesses of present research which deserve further attention in the future. Being a multiarticular movement, soccer kick is characterised by a proximal-to-distal motion of the lower limb segments of the kicking leg. Angular velocity is maximized first by the thigh, then by the shank and finally by the foot. This is accomplished by segmental and joint movements in multiple planes. During backswing, the thigh decelerates mainly due to a motion-dependent moment from the shank and, to a lesser extent, by activation of hip muscles. In turn, forward acceleration of the shank is accomplished through knee extensor moment as well as a motion-dependent moment from the thigh. The final speed, path and spin of the ball largely depend on the quality of foot-ball contact. Powerful kicks are achieved through a high foot velocity and coefficient of restitution. Preliminary data indicate that accurate kicks are achieved through slower kicking motion and ball speed values.

FULL TEXT

 

Η συνδεσμοπλαστική πρόσθιου χιαστού επηρεάζει και το υγιές πόδι

in Κλινική εμβιομηχανική

ON THE EVALUATION OF POSTURAL STABILITY AFTER ACL RECOSTRUCTION

Eleftherios Kellis, Ioannis G. Amiridis and Nikolaos Kofotolis

Laboratory of Neuromechanics, Department of Physical Education and Sports Sciences at Serres, Aristotle Uni-versity of Thessaloniki, Greece.
© Journal of Sports Science and Medicine (2011) 10, 422 – 423

We tested postural stability in fifteen men (aged 25.9 ± 0.8 yrs) three months after ACL reconstruction (with semitendinous graft) in the right knee, on average 4.3 months after rupture and 15 controls (age 24.3 ± 0.6 yrs) after signing informed consent forms. Participants performed a 30 sec Normal Quiet Stance (NQS) test and One- Legged Stance (OLS) (foot raised above the ground above the ground with the hip and knee flexed at 90° on a pressure platform (Comex SA, 50Hz, Loran Engineering Ltd, Bologna, Italy). Subsequently, the total sway path of the CoP, average speed of CoP, the standard deviation of the CoP in anteroposterior and mediolateral axis and the sway area (Tropp and Odenrick, 1988) were calculated. The best of three trials was further analysed.

As expected, our results show that operated subjects showed not only a higher CoP displacement compared with controls but they also displaced their CoP at a higher rate. It was interesting that, in contrast, to our expectations, no bilateral differences in postural stability were found.  Consequently, using CoP related measures to monitor progress of the subjects should be based either on pre-post treatment changes in stability tests of the same leg or by comparing the OLS values compared with normative values obtained from controls.

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