@article{ref1,
title="Changes in injury risk mechanisms after soccer-specific fatigue in male youth soccer players",
journal="Journal of human kinetics",
year="2018",
author="Lehnert, Michal and Croix, Mark De Ste and Xaverova, Zuzana and Botek, Michal and Varekova, Renata and Zaatar, Amr and Lastovicka, Ondrej and Stastny, Petr",
volume="62",
number="",
pages="33-42",
abstract="The aim of this study was to examine the acute effects of soccer specific fatigue on muscular and neuromuscular function in male youth soccer players. Elite soccer players (n = 20; age 15.7 ± 0.5 y; body height 177.75 ± 6.61 cm; body mass 67.28 ± 8.29 kg) were measured before and after soccer specific exercise (SAFT<sup>90</sup>). The reactive strength index (RSI) was determined by a drop jump test, leg stiffness (LS) by a 20 sub-maximal two-legged hopping test, and a functional hamstring to quadriceps strength ratio from isokinetic concentric and eccentric strength of the dominant and non-dominant leg (measured at angular velocities of 1.05 rad · s<sup>-1</sup> and 3.14 rad · s<sup>-1</sup>). Metabolic response to the SAFT<sup>90</sup> was determined by blood lactate and perceived exertion was assessed by the Borg scale. After simulated match play, a significant decrease in absolute LS (t = 4.411; p < 0.001; ω<sup>2</sup> = 0.48) and relative LS (t = 4.326; p < 0.001; ω<sup>2</sup> = 0.49) was observed and the RSI increased significantly (t = 3.806; p = 0.001; ω<sup>2</sup> = 0.40). A reduction in LS found after the SAFT<sup>90</sup> indicates possible reduction in dynamic knee stabilization. However, if we consider the changes in other observed variables, the present study did not clearly confirm that fatigue induced by a soccer specific protocol increased the risk of ACL and hamstring injury. This may be attributed to the simulated rather than actual match play used in the present study.<p /> <p>Language: en</p>",
language="en",
issn="1640-5544",
doi="10.1515/hukin-2017-0157",
url="http://dx.doi.org/10.1515/hukin-2017-0157"
}