scholarly journals Comparison of selected biomechanical parameters and support foot injury during soccer instep kick by preferred and non-preferred lower limbs of the novice players

2016 ◽  
Vol 14 (12) ◽  
pp. 1-9
Author(s):  
Mostafa Haj Lotfalian ◽  
◽  
Mahdi Kargarfard ◽  
Heydar Sadeghi ◽  
Sajjad Mohamadi ◽  
...  
Author(s):  
Flávio Antônio de Souza Castro ◽  
Luana Maciel Da Silva

Introdução: O eggbeater é uma técnica propulsiva fundamental para o polo aquático. Implica em força resultante propulsiva para cima, sendo utilizada no polo aquático para passes, marcação e chutes a gol.Objetivo: O objetivo desta revisão de literatura foi apresentar e discutir  parâmetros biomecânicos (cinemáticos e cinéticos) relacionados à técnica de execução da pernada de eggbeater.Métodos: As palavras-chave utilizadas para procura dos estudos revisados neste artigo foram: eggbeater kick, water polo e technique, em inglês e português. Foram utilizadas as bases Scopus, Portal Periódico da CAPES e Google Acadêmico. Dezenove estudos foram selecionados para a revisão.Resultados e Discussão: O movimento é caracterizado por uma ação cíclica e alternada dos membros inferiores, ou seja, enquanto a perna esquerda move-se no sentido horário, a perna direita move-se no sentido anti-horário. Estudos demonstram que o movimento não deve ser focado na direção vertical, mas na horizontal (sentido ântero-posterior e médio-lateral) para gerar maior força de sustentação. Em relação à cinemetria, a análise tridimensional parece ser a melhor ferramenta. Já para análise cinética, existe a necessidade de desenvolver tecnologias adequadas à mensuração das forças propulsivas no meio aquático. Ainda, resultados indicam que testes específicos, ou seja, o movimento executado em ambiente aquático mais próximo da realidade de jogo, apresentaram-se mais adequados para avaliar aspectos cinéticos e cinemáticos do movimento em análise.Conclusão: A fim de se incrementar a força de sustentação, a técnica deve ser horizontalizada. Biomechanics Apllied to the Water Polo: Review of Kinetics And Kinematics Parameters of the Eggbeater KickIntroduction: The eggbeater kick is a elementary propulsive technique for the water polo.Objective: The aim of this study was to review the biomechanical parameters (kinematics and kinetics) related to the eggbeater kick, description and analysis.Methods: The keywords used to search for the studies reviewed were: eggbeater kick, water polo and technique, in English and Portuguese. Scopus, CAPES and Google Scholar bases were used.Results and Discussion: The movement is characterized by a cyclic and alternating action of the lower limbs, i.e., while the left leg moves clockwise, the right leg moves in the counterclockwise direction. The eggbeater kick technique promotes a propulsive resultant upward force and it’s used in water polo for passes, marking and shots on goal. Studies have shown that the movement should not be focused in the vertical direction, but horizontally (anteroposterior and mid-lateral) to generate more lift. Regarding to kinematics, the three-dimensional analysis seems to be the best tool. As for kinetic analysis, it is necessary to develop appropriate technologies to measure the propulsive forces in water. Therefore, results indicate that more specific tests, performed in the aquatic enviroment, next to the game’s reality, are more adeqate to asses kinetc and kinematic aspects of the analyzed movement.Conclusion: In order to increase the lift force, the technique should be horizontalized. Development of specific assessments should be encouraged.


2011 ◽  
Vol 11 (4) ◽  
pp. 327-340
Author(s):  
Aleksandra Melińska ◽  
Andrzej Czamara ◽  
Łukasz Szuba ◽  
Romuald Będziński

Author(s):  
Rodrigo Rabello ◽  
Filippo Bertozzi ◽  
Manuela Galli ◽  
Matteo Zago ◽  
Chiarella Sforza

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Zehao Tong ◽  
Feng Zhai ◽  
Hang Xu ◽  
Wenjia Chen ◽  
Jiesheng Cui

Introduction. This study finds the lower limbs’ reactive strength index and biomechanical parameters on variable heights. Objective. This research aims to reveal the effects of drop height on lower limbs’ reactive strength index and biomechanical parameters. Methods. Two AMTI force platforms and Vicon motion capture system were used to collect kinematic and dynamic signals of the lower limbs. Results. The drop height had significant effects on peak vertical ground reaction force and peak vertical ground reaction force in the extension phase, lower limbs’ support moment, eccentric power of the hip joint, eccentric power of the knee joint, eccentric power of the ankle joint, and concentric power of the hip joint. The drop height had no significant effects on the reactive strength index. Reactive strength index (RSI) had no significant correlations with the personal best of high jumpers. The optimal loading height for the maximum reactive strength index was 0.45 m. Conclusion. The optimal loading height for the reactive strength index can be used for explosive power training and lower extremity injury prevention.


2018 ◽  
Vol 2018 ◽  
pp. 1-22 ◽  
Author(s):  
Nurul Azira Azizan ◽  
Khairul Salleh Basaruddin ◽  
Ahmad Faizal Salleh

Various studies have examined body posture stability, including postural sway and associated biomechanical parameters, to assess the severity effects of leg length discrepancy (LLD). However, various viewpoints have been articulated on the results of these studies because of certain drawbacks in the comprehensive analysis of the effect of variations in LLD magnitude. Therefore, this systematic review was performed to help focus on the current findings to help identify which biomechanical parameters are most relevant, commonly used, and able to distinguish and/or have specific clinical relevance to the effect of variations in LLD magnitude during static (standing) and dynamic (walking) conditions. Several electronic databases containing studies from the year 1983 to 2016 (Scopus, ScienceDirect, PubMed, PMC, and ProQuest) were obtained in our literature search. The search process yielded 22 published articles that fulfilled our criteria. We found most of the published data that we analyzed to be inconsistent, and very little data was obtained on the correlation between LLD severity and changes in body posture stability during standing and walking. However, the results of the present review study are in line with previous observational studies, which describe asymmetry in the lower limbs corresponding to biomechanical parameters such as gait kinematics, kinetics, and other parameters described during static (standing) postural balance. In future investigations, we believe that it might be useful to use and exploit other balance-related factors that may potentially influence body posture stability.


2014 ◽  
Vol 155 (43) ◽  
pp. 1701-1712 ◽  
Author(s):  
Ádám Tibor Schlégl ◽  
Kinga Szuper ◽  
Szabolcs Somoskeöy ◽  
Péter Than

Introduction: Lower limbs anatomical and biomechanical parameters are essential in several paediatric orthopaedic disease, which makes their exact measurement necessary. Aim: The aim of the author was to evaluate the reliability of the EOS 2D/3D System, a 3D reconstruction capable imaging device in children. Method: 3D reconstructions were performed in 523 cases aged between 2 and 16 years in whom no abnormality influencing lower limbs biomechanics was observed. For statistical analysis intraclass correlation, paired-samples t-test, Spearman-correlation and Welch-test were used. Results: Excellent results were found for all parameters in reliability test used by the operator. The step-forward position used during the examination influenced the sagittal tibiofemoral angle only. All examined parameters showed significant correlation with age and gender. Height correlated with neck-shaft angle, hip-knee shift, femoral and tibial torsion only. Conclusions: The EOS technology proved to be an appropriate method to measure lower limbs anatomical parameters in children. Changes in these parameters during development correlated with age and gender. Orv., Hetil., 2014, 155(43), 1701–1711.


2021 ◽  
Vol 11 (10) ◽  
pp. 4633
Author(s):  
Huiyu Zhou ◽  
Datao Xu ◽  
Chaoyi Chen ◽  
Ukadike Chris Ugbolue ◽  
Julien S. Baker ◽  
...  

The stop-jumping task is one of the most important technical actions in basketball. A previous study showed 70% probability of non-contact ACL injuries during stop-jumping tasks. Therefore, the present study aimed to investigate the differences in lower extremity biomechanical changes between the rear foot as the initial contact area to terminate the jump (SJR) and the fore foot as the initial contact area to also terminate the jump (SJF) during the horizontal landing during a stop-jumping phase. In total, 25 male amateur Ningbo University basketball athletes from China were recruited for this study. The participants were asked to jump vertically by using two different stop-jumping strategies. Kinematic and kinetics data were amassed during a stop-jumping task. Statistical parametric mapping (SPM) analysis was used to find the differences between SJR and SJF. Our results indicated that the change of different ankle range of motion caused significantly different values for knee angle (p < 0.001), velocity (p = 0.003) (p = 0.023) (p < 0.001), moment (p = 0.04) (p < 0.001), (p = 0.036) and power (p = 0.015) (p < 0.001) during the stop-jumping phase and the horizontal landing phase. The same biomechanical parameters of the hip joint were also significantly different for hip angle (p < 0.001), moment (p = 0.012) (p < 0.001) (p < 0.001), and power (p = 0.01) (p < 0.001) (p < 0.001). These findings indicate that altering the primary contact at the ankle angle might effectively reduce the risk of a knee injury.


Author(s):  
Yui Kawano ◽  
Lin Cheng-Feng ◽  
Mayumi Kuno-Mizumura

This study aimed to identify the factor structures—which are the predominant frameworks for describing the basic dimensions of a concept—that contribute to the aesthetics of body position in ballet. This study was composed of three-dimensional movement analysis and subjective evaluation. Fourteen ballet dancers participated in the three-dimensional movement analysis. Thirty-six reflective markers were attached to the dancers’ bodies, after which the dancers performed a piqué arabesque, a position in which the weight transfers from one leg to the other. This movement was captured using eight optical cameras and one video camera. Biomechanical parameters, such as the joint angle and velocity of each body part, were calculated from the coordinates of the markers. Twenty-eight videos recorded in the three-dimensional movement analysis were viewed by 51 observers with ballet experience. The observers subjectively evaluated the videos through four category pairs—“beautiful-ugly,” “like-dislike,” “interesting-not interesting,” and “good-bad”—on a five-point semantic differential scale. Two groups, the top and bottom 30%, were extracted based on the “beautiful-ugly” rating and compared using an independent t-test. In addition, exploratory factor analysis was performed on the biomechanical parameters that showed significant differences. Five factors were identified: “stability of the right distal upper limb and upper body,” “torso displacement speed,” “stability of the left distal upper limb and line of the support leg,” “height of the gesture leg,” and “stability of the support leg around the hip joint and line of the limbs on the gesture leg side.” These results indicate that the movements of both upper and lower limbs contributed to the aesthetics of the ballet position of piqué arabesque. These findings will be useful for ballet teachers and dancers to understand the intrinsic aesthetics of movements.


2018 ◽  
Vol 104 (5) ◽  
pp. 609-616 ◽  
Author(s):  
István Márkus ◽  
Ádám Tibor Schlégl ◽  
Máté Burkus ◽  
Kristóf József ◽  
Bálint Niklai ◽  
...  

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