Analysis of forces in knee joints of top football players and futsal players in different types of jumps

2021 ◽  
Author(s):  
Radivoje Radakovic ◽  
Nikola Jankovic ◽  
Jelena Dimitrijevic ◽  
Natasa Zdravkovic Petrovic ◽  
Aleksandra Vulovic ◽  
...  
Keyword(s):  
Knee Joints ◽  
Football Players ◽  
Different Types

scholarly journals Pray the White Way: Religious Expression in the NFL in Black and White

Religions ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 470
Author(s):  
Scholes
Keyword(s):  
National Football League ◽  
Religious Language ◽  
Football Players ◽  
Religious Expression ◽  
Black And White ◽  
Different Types ◽  
The Media ◽  
Theological Debate ◽  
Racial Lines ◽  
African American Theology

Athletes, particularly players in the National Football League, have repeatedly invoked God in order to glorify, praise, or even credit the divine with success on the field. This essay examines the ways in which different types of religious language used to bring God onto the gridiron are received and evaluated along racial lines. I seek to show that speech by athletes, in particular black football players, that communicates a God who is partisan and intervenes in action on the field is routinely dismissed by fellow players, the media, and religious authorities who favor a God who either intervenes softly and generally or is above the game altogether. I contend that a double standard is applied to this theological debate due to a disregard of historical African American theology and to hegemonic white evangelical norms that police such discourse.

scholarly journals The priority of sports results as the main destructive factor in the training system of young football players 6-13 years old

2021 ◽  
pp. 16-19
Author(s):  
Oleg Bairachniy
Keyword(s):  
High Efficiency ◽  
Youth Sports ◽  
Negative Influence ◽  
Training System ◽  
Football Players ◽  
Training Process ◽  
Full Disclosure ◽  
Rational System ◽  
Different Types

Achievement of high efficiency of functioning of children and youth sports schools is possible only in conditions of building a rational system of training young football players. The rational system of training the sports reserve in football, among other things, involves the maximum realization of the athlete's motor and mental potential in the optimal age intervals for this. The orientation of sports schools towards achieving a long-term goal and full disclosure of individual capabilities, starting from the first stages of many years of training, is the key to the emergence of qualified and competitive players. At the same time, one of the main features of the system of youth football in Ukraine is the excessive striving of the majority of coaches of children's teams for a result in a match and victories in tournaments. The purpose of the research was to study the specificity of the orientation of various components of training young football players of 6-13 years old in terms of priority of the competitive result. Research results. The article presents the results of the analysis of the negative influence of the priority of the current competitive result on the content and orientation of various types of training. The nature of the changes in the orientation of the training process and their relationship with the level of preparedness of the players in the long term have been demonstrated. Taking into account the interconnection of different types of training, the consequences of planning the training process were revealed, provided that the current competitive results are of paramount importance at the early stages of long-term training.

Behavioral Tackling Interventions Decrease Head Impact Frequency in American Football Players: A Critically Appraised Topic

2020 ◽  
pp. 1-7
Author(s):  
Ashley E. Evans ◽  
Madeline Curtis ◽  
Marguerite (Meg) Montjoy ◽  
Erica Beidler
Keyword(s):  
High School ◽  
Injury Prevention ◽  
Head Impact ◽  
American Football ◽  
Football Players ◽  
Clinical Question ◽  
Impact Frequency ◽  
Bottom Line ◽  
Head Impacts ◽  
Different Types

Context: The rate of sport-related concussion diagnosis has significantly increased in recent years, which has created a need for injury prevention initiatives. There have been efforts put forth by researchers and American football organizations to teach athletes how to tackle properly in order to decrease the number of subconcussive head impacts and concussions. Clinical Question: Does the implementation of a behavioral tackling intervention decrease the head impact frequency in American football players? Clinical Bottom Line: There is moderate SORT Level B evidence to support the use of behavioral tackling interventions as a means for reducing head impact frequency in football athletes. All four included studies found a significant reduction in head impacts following a behavioral tackling intervention with study findings ranging from a 26–33% reduction in impact frequency. These findings were consistent in youth, high school, and college football players and for different types of behavioral tackling interventions. Therefore, these results indicate that behavioral tackling interventions have the potential to reduce the number of head impacts sustained by American football players, which may ultimately lead to a reduction in concussion occurrence as well.

scholarly journals Model indicators of collective interactions of highly qualified football players during the game

2019 ◽  
Vol 5 (4) ◽  
pp. 33
Author(s):  
V.M. Kostiukevych
Keyword(s):  
Comprehensive Analysis ◽  
Football Players ◽  
Highly Qualified ◽  
Collective Actions ◽  
Competitive Activity ◽  
Different Types ◽  
Two Phases ◽  
Collective Interactions ◽  
Selection Of ◽  
Selection Phase

<p><strong>The aim</strong> of the study wos to determine the model indicators of highly qualified football players in the game based on a comprehensive analysis of competitive activity.</p><p><strong>Material and methods</strong>. The study involved players from 8 leading Ukrainian football teams. A video analysis of 8 football matches of the leading teams of Ukraine was conducted. There was a pedagogical observation of the collective actions of the players. The actions of the players were recorded in a specially developed expert card. The indicators of the quantity and effectiveness of the use of various tactical actions by the players were determined. Collective interactions of football players during the game during ball possession and during the ball were recorded. The number of interactions of 2-3 players, 4-5 players, 7 or more players was determined during possession of the ball and during the selection of the ball. The number of different types of gears (short, medium, long) was also analyzed.</p><p><strong>Results</strong>. An analysis of the competitive activity of club and national teams of high qualification allows us to state that the result of the match largely depends on the collective interactions of the players. The collective interactions of football players during the game are carried out in two phases - possession of the ball and selection of the ball. In</p><p>the phase of possession, the interaction of 2-3 players is 71.6%, 4-6 players - 24.1%, out of 7 and more players - 4.3%. In the selection phase, the interaction of 2-3 players is 63.1%, 4-6 players - 22.9%, 7 or more players - 14.0%. It was revealed that the number of ball passes during the game, which are divided: in tactical direction - holding (29.8%), developing (55, 4%), aggravating (14.8%); in range - short (58.3%), medium (30.5%), long (30.5%); in range and coordination complexity: in 1 RCS 60.9% of short, 36, 4% of medium, 27.7% of long transfers are performed; in 2 CSWs - 32.7% of short, 49.6% of medium, 27, 7% of long transfers; in 3 CSWs - 6.4% of short, 14% of medium, 15, 8% of long transfers.</p><strong>Conclusions.</strong> The most important component of the collective interactions of the players is the ball passes, which are divided into tactical directions by holding (14.8%), developing (55.4%) and sharpening (14.8%).

Effects of Speed and Different Types of Treadmill on the Range of Motion of the Lower Extremities

1997 ◽  
Vol 84 (3_suppl) ◽  
pp. 1399-1402 ◽  
Author(s):  
Jiping Shih ◽  
Y. Tai Wang ◽  
Sherrae Sinclair
Keyword(s):  
Range Of Motion ◽  
Ankle Joint ◽  
Lower Extremities ◽  
Knee Joints ◽  
Different Types

This study examined the range of motion of the lower extremities in 20 subjects (10 men, 10 women) exercising on treadmills. Of particular interest was how this parameter was affected by speed and different types of treadmill. Analysis indicated that there were statistically significant differences in the hip and knee joints, but not in the ankle joint for two selected types of treadmill set at the same speed.

scholarly journals What Frequency of Technical Activity Is Needed to Improve Results? New Approach to Analysis of Match Status in Professional Soccer

2019 ◽  
Vol 16 (12) ◽  
pp. 2233 ◽  
Author(s):  
Marek Konefał ◽  
Paweł Chmura ◽  
Kacper Rybka ◽  
Jan Chmura ◽  
Maciej Huzarski ◽  
...  
Keyword(s):  
High Frequency ◽  
Effect Sizes ◽  
Large Impact ◽  
Football Players ◽  
Frequency Of Occurrence ◽  
New Approach ◽  
Professional Soccer ◽  
Novel Approach ◽  
Different Types ◽  
Moderate Effect

The aim of the research detailed here has been to assess the frequency with which football players engage in technical activity of various different types, in relation to seven phases of a game associated with changes in match status. To this end, 2016–2017 domestic-season matches in Germany’s Bundesliga were analyzed, the relevant data being retrieved using an Opta Sportsdata Company system. Technical activity taken into consideration included shots, passes, ball possession, dribbles, and tackles. It was found that there was a large impact of frequency of shots on target (H = 466.999(6); p = 0.001) in relation to the different match-status phases. Furthermore, moderate effect sizes were then obtained for frequency of shots (H = 187.073(6); p = 0.001), frequency of passes (H = 133.547(6); p = 0.001), and percentage of ball possession (H = 123.401(6); p = 0.001). The implication would be that a team trying to change the match score of a game experienced at a given moment in a more favorable direction will need to raise the frequency and accuracy of passes, the percentage of ball possession, and the percentage of tackles ending in success. The maintenance of a winning match status requires a high frequency of occurrence of shots and shots on target as well as greater frequency and effectiveness of dribbling. The main finding from our work is that consideration of the consequences of a game presented in relation to seven potential phases to match status can point to a novel approach to analysis.

Statistical properties of the mutual transfer network among global football clubs

2018 ◽  
Vol 32 (29) ◽  
pp. 1850320 ◽  
Author(s):  
Ming-Xia Li ◽  
Qiao-Li Xiao ◽  
Yue Wang ◽  
Wei-Xing Zhou
Keyword(s):  
Power Law ◽  
Node Degree ◽  
Edge Weight ◽  
Football Players ◽  
Football Clubs ◽  
Tail Distribution ◽  
The World ◽  
Different Types ◽  
Topological Characteristics ◽  
Nonlinear Correlations

Football is the most popular sport in the world, and one of the most interesting events is the transferring of football players among various clubs. Based on 470,792 transfer records among 23,605 football clubs in 206 countries and regions, we construct a mutual transfer network and investigate its basic topological characteristics related to node degree k, edge weight w and node strength s. We find that the distributions can be well fitted by bimodal distributions for k and s or a power-law tail distribution for w. By studying the features of neighbor nodes or edges, we find that the mutual transfer network exhibits assortative mixing for most nodes or clubs but disassortative for clubs with very large degrees. We also observe nonlinear correlations among the different types of measures. Our work sheds new lights into the investigation of the characteristics of football transfer activities.

scholarly journals Iron Homeostasis in Elite Athletes and Ultramarathon Runners

Proceedings ◽  
2019 ◽  
Vol 25 (1) ◽  
pp. 32
Author(s):  
Skenderi ◽  
Papanikolaou ◽  
Nomikos ◽  
Kotsis ◽  
Tsironi
Keyword(s):  
Iron Metabolism ◽  
Iron Homeostasis ◽  
Elite Athletes ◽  
Football Players ◽  
Different Types ◽  
Reliable Marker ◽  
Type Of Exercise ◽  
Main Regulator ◽  
Sports Anemia

AIM: The present study was aimed at determining the effect of two different types of exercise (elite athletes playing football and ultramarathon runners on iron metabolism and, especially, the role of hepcidin in iron homeostasis. MATERIAL & METHOD: Two groups of athletes were investigated. The first group consisted of 19 male elite football athletes and the second group of 41 ultramarathon runners. In both cases, blood samples were taken pre-race (t1), immediately post-race (t2), and 24 hours post-race for football athletes or 36-48 hours post-race for ultramarathon athletes (t3). RESULTS: The iron levels in time t3 were found to have statistically significant decreases compared with the iron levels in pre-race and post-race period. Moreover, ferritin levels increased significantly in times t2 and t3. Hepcidin levels increased in time t2 in football players (from 27.45 ± 12.98 to 37.42 ± 13.74 ng/mL) and decreased in time t3. However, in ultramarathon runners, hepcidin levels significantly increased in time t2 (from 29.16 ± 10.92 to 58.81 ± 16.97 ng/mL) and remained increased in time t3 (37.69 ± 16.38 ng/mL), despite a trend for decrease. In football players, sTfR levels did not change, contrary to ultramarathon runners, where sTfR levels were found decreased in times t2 and t3. CONCLUSIONS: Iron metabolism in athletes can be impacted by the type of exercise. Ferritin is not a reliable marker for iron balance because, in the present study, it is more likely an acute-phase protein. The main regulator of iron homeostasis, hepcidin, increased, showing the body’s response to inflammation, by trapping iron in the macrophages and by altering iron absorption. Finally, a strenuous and prolonged exercise can lead to sports anemia.

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