scholarly journals Physical performance tests – a relationship of risk factors for muscle injuries in elite level male football players

2018 ◽  
Vol 14 (2) ◽  
pp. 282-288 ◽  
Author(s):  
Kjell Svensson ◽  
Marie Alricsson ◽  
Marcus Olausson ◽  
Suzanne Werner
2016 ◽  
Vol 26 (3) ◽  
pp. 933-937 ◽  
Author(s):  
Kjell Svensson ◽  
Mattias Eckerman ◽  
Marie Alricsson ◽  
Theofilos Magounakis ◽  
Suzanne Werner

2016 ◽  
Vol 13 (3) ◽  
pp. 5660
Author(s):  
Ozan Sever ◽  
Erkal Arslanoğlu

The aim of study was to investigate age-related agility, acceleration, speed and maximum speed relationships in soccer players. Study consisted of 125 young football players aged between 14 and 18 from Karabükspor youth and reserve team who were measured for 30m speed,10m acceleration, 20m maximum speed, and T-Agility tests. The test values of players decreased with age as expected. All performance tests correlated significantly but coefficients of determination (r2) between agility test and all other tests were low. Acceleration and other tests except 30m speed also were low. There were no differences in age groups in terms of correlation between tests. Because of low coefficients of determination, it could be said that maximal speed, acceleration, agility were correlated by chance and were different components of physical performance so different training sessions should be planned for each physical abilities. ÖzetÇalışmada futbolcuların sürat, çeviklik, ivmelenme ve maksimum sürat becerilerinin yaşa bağlı değişimi ve birbirleri ile ilişkisi araştırılmıştır. Karabükspor altyapısı, A2 takımında 14-18 yaş aralığındaki 125 sporcu katılmıştır. Sporcuların 10m ivmelenme, 30m sürat ve T-Çeviklik ve 20 m maksimum sürat ölçümleri yapılmıştır. İstatistiksel analiz SPSS 19 programında yapılıp, 0,05 anlamlılık değeri olarak kabul edilmiştir. Sporcuların, çeviklik, ivmelenme, sürat ve maksimum sürat ölçüm süreleri yaş ile birlikte düşüş göstermektedir. En belirgin düşüş çeviklik testinde ortaya çıkmıştır. Tüm ölçümler arasında pozitif doğrusal ilişki vardır. Bu ilişki yaş faktörü ile incelendiğinde anlamlılık devam etmiştir. Fakat açıklayıcılık katsayılarına(r2) bakıldığında çeviklik ile diğer tüm ölçümler, ivmelenme ile 30 metre sürat süresi hariç tüm ölçümlerde düşük ilişki söz konusudur. Yaşa bağlı değişimde çevikliğin, doğrusal koşulara göre daha belirgin geliştiği ortaya çıkmıştır. Açıklayıcılık katsayısının düşük bulunması futbolcuların çeviklik, ivmelenme, sürat becerilerinin birbirleri ile güçlü ilişkisinin olmadığını göstermektedir. Bu fiziksel becerilerin birbirlerinden ayrı özellikler olduğu, antrenman planlamalarının bu beceriler ayrı ele alınarak yapılmasının faydalı olacağı düşünülmektedir.


2019 ◽  
Vol 40 (14) ◽  
pp. 903-908
Author(s):  
Rogério F. Liporaci ◽  
Marcelo Saad ◽  
Debora Bevilaqua Grossi ◽  
Marcelo Riberto

AbstractFootball players frequently face the occurrence of non-contact injuries. Although there are likely multiple factors that contribute to increased risk of non-contact injury, it remains a challenge to correlate all these factors. However, it is not clear how much of individual training abilities may interfere in these events. As such, the primary aim of the present study was to determine whether the reduction of functional performance of the thigh in the isokinetic knee tests, anthropometric and morbid history can establish risk factors for lower-limb musculoskeletal injuries throughout the season. The incidence of injuries and odds ratios were calculated for suspected risk factors. Hamstring/Quadriceps conventional ratio outside of the safety range (55–64%) may be involved in the occurrence of non-contact muscle injuries and the risk for any musculoskeletal injuries in the lower extremities is 16 times higher when extensor peak of torque exceeds 10% and 12 times higher when flexor peak of torque difference was greater than 10%. This kind of evaluation can result in intervention programs that may decrease the risk of lower-limb musculoskeletal injuries. Based on these results we can establish a specific and individualized exercise program for each athlete and thus protect them during the season.


2016 ◽  
Vol 50 (22) ◽  
pp. e4.7-e4 ◽  
Author(s):  
K Svensson ◽  
M Eckerman ◽  
M Alricsson ◽  
T Magounakis ◽  
S Werner

2001 ◽  
Vol 1 (1) ◽  
pp. 17-41 ◽  
Author(s):  
Suzanne H. Lowensohn ◽  
Frank Collins

Audits are the primary means of monitoring that public funds are appropriately spent by governmental entities. Currently, independent auditors (rather than governmental auditors) are the primary suppliers of governmental audit services, despite the fact that many of them view governmental audits as “secondary” (AICPA 1987). Furthermore, nongovernmental auditors are believed to be less “independent” and more prone to lose sight of the programmatic demand to safeguard the public trust (Power 1997) than governmental auditors. To better understand the supply of governmental audit services, this study investigates independent audit firm partner opinions of governmental audits and their motivation to pursue these engagements. Multiple regression results of our data reveal that partners are more likely to pursue governmental audits if they believe that desirable intrinsic and extrinsic rewards are attainable through performing these audits. Furthermore, environmental risk factors—an active political climate and authoritative changes—reduce partner motivation to pursue governmental audits. It is suggested that environmental risk factors disrupt the comfortable principal/agent relationship of the auditor and auditee because the relationships have become decoupled (abstracted) from the audit's programmatic mission.


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