The Free Kick Kinematics of Elite Football Players
Dujaka Aziz,
Sokoli Bylbyl
Issue:
Volume 4, Issue 2, June 2019
Pages:
18-27
Received:
7 July 2019
Accepted:
3 August 2019
Published:
16 August 2019
Abstract: We have considered the kinematics parameters for the free instep kick of the elite footballer (Cristiano Ronaldo), in the pace of the swing leg movement and the supporting leg with linear velocity measurement, angular displacement and angular velocity of the joints (ankle, knee, hip). We used the cinematographically method through Kinovea-0.8.26-win32. exe and Photo Suite 4 Platinum Editor from MGI Software of filming of a free instep kick (10. LaLiga, vs. Villarreal, 21/02/2010), and where as the caliber size we have taken the diameter of the ball, creating its kinograms in stages of movement. We have especially analyzed the Approach phase which Cristiano Ronaldo traverses at a distance of 4.0 m, which is passed in 3 steps (1.14 m; 1.72 m; 2.75 m). Angle of approach is 40 degrees, the free-kick distance is 30 m. During the contact of foot/ball, knee angle of the swing leg is 132 degrees (support leg 153 deg), while the ball is hit by a linear velocity of ankle joint 17.5 m/s, giving the ball a speed of 13.7 m/s. Result of this research is the way of execution the second step of approach phase which Cristiano Ronaldo is performing with the placement of the right foot in the ground only with the tip of the fingers and not with the whole foot, passing quickly backs winging phase, and phase of hip flexion and knee extension during downward motion.
Abstract: We have considered the kinematics parameters for the free instep kick of the elite footballer (Cristiano Ronaldo), in the pace of the swing leg movement and the supporting leg with linear velocity measurement, angular displacement and angular velocity of the joints (ankle, knee, hip). We used the cinematographically method through Kinovea-0.8.26-wi...
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Investigating the Factors Affecting the Sustainable Management of Sporting Student Events Worldwide
Mohammad Saeid Kiani,
Leila Nazari,
Leila Shahbazpour
Issue:
Volume 4, Issue 2, June 2019
Pages:
28-32
Received:
5 August 2019
Accepted:
25 September 2019
Published:
9 October 2019
Abstract: The purpose of the present study was to investigate the factors affecting sustainable management in sporting events for students worldwide. The method of this study is a review study and has become a challenging issue due to the importance of environmental issues in the world and the role of the environment in researcher has studied and translated related articles and books on sustainable management at sporting events from 2000 to 2019. According to the findings, sustainable development is a process of change that aligns resource utilization, investment management, technological development orientation and organizational change with current and future needs. Identifying and explaining students' attitudes to the environment, as an informed and influential part of society, is an essential and important step in environmental policy making and generating awareness of the environment and its dangers and how to protect the environment. The researcher concludes that resolving the contemporary environmental crisis requires the development of student participation to preserve the environment in sporting events so that by increasing knowledge of changing values and enhancing change potential, appropriate conditions are created for solidarity and harmony between students and the environment. Be provided. The more students use information resources such as the visual media, the written, their environmental attitudes and performance in sporting events, the better environmental factors.
Abstract: The purpose of the present study was to investigate the factors affecting sustainable management in sporting events for students worldwide. The method of this study is a review study and has become a challenging issue due to the importance of environmental issues in the world and the role of the environment in researcher has studied and translated ...
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