Kinematics Analysis of Instep Shot in Different Heights

2014 ◽  
Vol 978 ◽  
pp. 106-109
Author(s):  
Pan Li
Keyword(s):  
Test System ◽  
Soccer Players ◽  
Kinematics Analysis ◽  
Biomechanical Test ◽  
Male College ◽  
Ball Velocity ◽  
Ball Trajectory ◽  
Support Leg ◽  
Ball Point ◽  
Kinematics Parameters

Using biomechanical test system to reveal the kinematics parameters of instep shot in different heights in soccer players. Twelve healthy male college students voluntarily participated in this study. After digitizing the recording collected by camera, this study reached the following conclusion that (1) In instep front shot the lower the contact height with ball during kicking, the faster the ball velocity. Therefore, the author put forward a proposal that in order to obtain the faster ball velocity, the kicking ball point should be lower, and (2) the player can control the ball velocity, ball trajectory, and the time of technique by controlling the vertical distance between support leg and ball.

Biomechanical Kinetics Analysis of Flexors and Extensors on Knee Joint in Soccer Players

2014 ◽  
Vol 540 ◽  
pp. 313-316
Author(s):  
Pan Li
Keyword(s):  
Knee Joint ◽  
Peak Torque ◽  
Test System ◽  
Soccer Players ◽  
Kinetics Analysis ◽  
Biomechanical Test ◽  
Significant Difference ◽  
Flexor Muscles ◽  
Male College ◽  
Kinetics Measurement

Using kinetics measurement method with CON-TREX biomechanical test system to reveal the peak torque of flexors and extensors in knee joint under different velocities in soccer players. Thirteen male college students participated in this study,. After analyzing the data collected by kinetics measurement device , this study reached the following conclusion that (a) there is no significant difference in different velocities on absolute peak torque and relative peak torque in knee joint of soccer players,(b) the knee joint extensor and flexor muscles in different velocities in soccer players should be developed with balance.

Kinetics Analysis of Instep Soccer Kick in Three Heights

2014 ◽  
Vol 1014 ◽  
pp. 161-164
Author(s):  
Pan Li
Keyword(s):  
Reaction Force ◽  
Force Plate ◽  
Soccer Players ◽  
Healthy Male ◽  
Principal Function ◽  
Kinetics Analysis ◽  
Male College ◽  
Ball Velocity ◽  
Soccer Kick ◽  
Support Leg

Using biomechanics theory to reveal the reaction force of ground of support leg in instep shot in different heights in soccer players. Twelve healthy male college students voluntarily participated in this study. After testing each participant by Kistler force plate and then analyze the collected data, the present study draws the following findings that (1) The reaction force of ground on support leg was independent of the ball velocity,(2) The principal function of support leg was in charge of fixing support, maintaining balance for optimal kicking ball of kicking leg.

Analysis of ball velocity for different groups of positional soccer players

2020 ◽  
Vol 10 (4) ◽  
pp. 19-24
Author(s):  
Md. Yeasir Arafat ◽  
Jannatul Ferdaus Rickta ◽  
Fatima Tus Johora Mukta
Keyword(s):  
Soccer Players ◽  
Ball Velocity

scholarly journals Selected Cognitive Abilities in Elite Youth Soccer Players

2015 ◽  
Vol 49 (1) ◽  
pp. 267-276 ◽  
Author(s):  
Veronika Baláková ◽  
Petr Boschek ◽  
Lucie Skalíková
Keyword(s):  
Cognitive Abilities ◽  
Factor Model ◽  
Test System ◽  
Soccer Players ◽  
Youth Soccer ◽  
Soccer Teams ◽  
Research Findings ◽  
Raven's Standard Progressive Matrices ◽  
Year 2000 ◽  
The Relationship

Abstract The identification of talent in soccer is critical to various programs. Although many research findings have been presented, there have been only a few attempts to assess their validity. The aim of this study was to determine the relationship between talent and achievement variables in the Vienna Test System. The participants were 91 Czech soccer players, representing four youth soccer teams, who were born in the year 2000. These boys were divided into two groups according to their coaches’ assessments using a TALENT questionnaire. A two-factor model (component 1: “kinetic finesse”; component 2: “mental strength”) was designed to interpret the responses of the coaches on the questionnaire. The Vienna Test System was used to determine the level of players’ cognitive abilities. In total, the subjects performed seven tests in the following order: Raven’s Standard Progressive Matrices (SPM), a reaction test (RT), a determination test (DT), a visual pursuit test (LVT), a Corsi Block-Tapping Test (CORSI), a time/movement anticipation test (ZBA), and a peripheral perception test (PP). To analyze the relationship between talent and achievement variables within the Vienna Test System, correlation analyses were performed. The results revealed that the talented group attained significantly better results on only 1 of the 16 variables, which was ZBA2: movement anticipation - deviation of movement median (r = .217, p = .019). A comparison of the two talent components showed that component 1 (“kinetic finesse”) was a more significant factor than component 2 (“mental strength”). Although we observed statistically significant correlations, their actual significance remains questionable; thus, further research is required.

Kinematics Analysis of a New 5 DOF Parallel-Serial Machine Tool Based on the Vector Method

2010 ◽  
Vol 450 ◽  
pp. 283-287 ◽  
Author(s):  
Rui Wang ◽  
Gang Ding ◽  
Shi Sheng Zhong
Keyword(s):  
Machine Tool ◽  
Parallel Mechanism ◽  
Kinematics Analysis ◽  
Vector Method ◽  
Velocity Transformation ◽  
Axis Parallel ◽  
Movable Platform ◽  
Parameter Coupling ◽  
The Relationship ◽  
Kinematics Parameters

A 5-axis parallel-serial machine tool is proposed, which consists of a 3-DOF parallel mechanism and a 2-DOF serial mechanism, and the kinematics analysis is discussed in detail based on the vector method. The size of the velocity transformation matrix is decreased. The problem of parameter coupling is resolved by adopting identity matrix and four-element vector. The relationship between the velocity and acceleration of the movable platform and the input parameters of the parallel mechanism is established. These algorithms are verified correct through ADAMS (Automatic Dynamic Analysis of Mechanical System) and can be referenced by kinematics analysis, dynamics analysis of parallel or parallel-serial machine tools, which have coupling kinematics parameters.

scholarly journals Does the FIFA 11+ Program Prevent Hamstring Injuries in College-Aged Male Soccer Players? A Critically Appraised Topic

2021 ◽  
Vol 30 (1) ◽  
pp. 158-160
Author(s):  
Scott Benson Street ◽  
Thomas Kaminski
Keyword(s):  
Lower Extremity ◽  
Soccer Players ◽  
Lower Extremity Injury ◽  
Clinical Question ◽  
Bottom Line ◽  
Warm Up ◽  
Lower Extremity Injuries ◽  
Hamstring Injuries ◽  
Male College ◽  
Extremity Injuries

Clinical Scenario: Hamstring injuries are the most prevalent lower-extremity injury among soccer players. The Fédération Internationale de Football Association (FIFA) has addressed this issue by developing the FIFA 11+ program, which is focused on improving strength and decreasing the incidence of lower-extremity injuries in the sport. This critically appraised topic focuses on this program as well as one of its components, the Nordic hamstring exercise, in the prevention of hamstring injuries. Clinical Question: Does the FIFA 11+ program prevent hamstring injuries in college-aged male soccer players? Summary of Key Findings: Four studies were selected to be critically appraised. The PEDro checklist was used to score the articles on methodology and consistency. All 4 articles demonstrated support for the clinical question. Clinical Bottom Line: There is moderate evidence to support the use of the FIFA 11+ program and Nordic hamstring exercise as part of a college soccer team’s warm-up routine. Strength of Recommendation: Grade B evidence exists in support of incorporating the FIFA 11+ program to reduce the incidence of hamstring injuries in male college soccer players.

Evaluation of Two Methods of the Jump Float Serve in Volleyball

2012 ◽  
Vol 28 (5) ◽  
pp. 579-586 ◽  
Author(s):  
Sasho MacKenzie ◽  
Kyle Kortegaard ◽  
Marc LeVangie ◽  
Brett Barro
Keyword(s):  
Movement Patterns ◽  
Flight Time ◽  
Lateral Movement ◽  
Volleyball Players ◽  
Ball Velocity ◽  
Ball Contact ◽  
Projection Angle ◽  
Ball Trajectory

A novel jump-focused (JF) technique of the jump float serve was compared with the conventionally used contact-focused (CF) method. Seven elite male (height: 195 ± 6 cm) and two elite female (height: 181 and 182 cm) volleyball players were videoed at 60 Hz performing both techniques. Horizontal and vertical ball contact coordinates, pre- and postcontact ball velocities, and initial projection angles were determined. The JF technique resulted in a significantly higher mean contact height, t(8) = 4.12, p = .006, d = 0.72, initial serve speed, t(8) = 4.71, p = .006, d = 2.03, and significantly flatter initial projection angle, t(8) = 2.53, p = .036, d = 0.63, relative to the CF technique. The precontact vertical ball velocity was also significantly higher, t(8) = 8.04, p = .004, d = 2.86. The higher precontact vertical ball velocity suggests it is more difficult to make accurate contact with the ball during the JF technique. However, this method promotes a more favorable ball trajectory and a greater initial serve speed. When combining the random lateral movement patterns inherent in any float serve, with the reduced flight time associated with the JF technique, a more challenging passing scenario can be presented to the defensive team in comparison with the current CF technique.

Kinematics Analysis of Mechanisms Based on Dynamics Multibody Systems in Virtual Assembly Environment

2010 ◽  
Vol 102-104 ◽  
pp. 214-218
Author(s):  
Zhi Xian Zhang ◽  
Jian Hua Liu ◽  
Ru Xin Ning
Keyword(s):  
Multibody Systems ◽  
Multibody System ◽  
Virtual Assembly ◽  
Assembly System ◽  
Prototype System ◽  
Motion Simulation ◽  
Kinematics Analysis ◽  
Simulation Process ◽  
Dynamics Of Multibody Systems ◽  
Kinematics Parameters

In recent years, in view of the absence of kinematics analysis function of mechanisms in the virtual assembly system, the method of kinematics analysis of mechanisms based on dynamics of multibody systems in virtual assembly environment is presented. A mechanism is considered as a multibody system and the kinematics equations are established based on Descartes coordinate system. All the kinematics parameters, just like position, speed and acceleration, can be obtained through solving the kinematics equations. In addition, the realization method of mechanism motion simulation in virtual assembly system is also proposed which contains the hiberarchy, data structure, module classes and simulation process of the system. The method is implemented and validated based on the prototype system VAPP(Virtual Assembly Process Planning).

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