A Practical Approach to Monitoring Biomarkers of Inflammation and Muscle Damage in Youth Soccer Players During a 6-Month Training Cycle.

Autor:	Podgórski T; Department of Physiology and Biochemistry, Poznan University of Physical Education, Poznań, Poland., Kryściak J; Department of Physiology and Biochemistry, Poznan University of Physical Education, Poznań, Poland., Pluta B; Department of Methodology of Recreation, Poznan University of Physical Education, Poznań, Poland., Adrian J; Department of Theory and Methodology of Team Sports Games, Poznan University of Physical Education, Poznań, Poland., Marynowicz J; Department of Theory and Methodology of Team Sports Games, Poznan University of Physical Education, Poznań, Poland., Krzykała M; Department of Methodology of Recreation, Poznan University of Physical Education, Poznań, Poland., Konefał M; Department of Biological and Motor Sport Bases, University School of Physical Education, Wrocław, Poland., Chmura P; Department of Team Games, University School of Physical Education, Wrocław, Poland., Chmura J; Department of Biological and Motor Sport Bases, University School of Physical Education, Wrocław, Poland., Andrzejewski M; Department of Methodology of Recreation, Poznan University of Physical Education, Poznań, Poland.
Jazyk:	angličtina
Zdroj:	Journal of human kinetics [J Hum Kinet] 2021 Oct 31; Vol. 80, pp. 185-197. Date of Electronic Publication: 2021 Oct 31 (Print Publication: 2021).
DOI:	10.2478/hukin-2021-0093
Abstrakt:	The aim of the study was to determine the effects of a 6-month training cycle on muscle damage and inflammatory markers in youth male soccer players. Twenty-one soccer players were tested four times: at the beginning (T1) and immediately after the pre-season period (T2), in the middle (T3) and at the end of the competitive period (T4). Muscle damage and inflammatory markers were determined in blood taken 36 hours after the match. Throughout the training cycle significant increases (p < 0.05) of creatine kinase (T1: 254.4 U·L -1 ; T4: 304.2 U·L -1 ) and lactate dehydrogenase (T1: 382.8 U·L -1 ; T4: 453.2 U·L -1 ) activities were observed. Significant changes (p < 0.05) in platelet count (T1: 210.5·10 9 ·L -1 ; T4: 234.2·10 9 ·L -1 ), percentage of lymphocyte (T1: 39.80%; T4: 42.97%), monocyte (T1: 6.88%; T4: 9.99%) and granulocyte (T1: 53.32%; T4: 47.05%) as well as in granulocyte-to-lymphocyte (T1: 1.41; T4: 1.17) and lymphocyte-to-monocyte (T1: 6.21; T4: 4.46) ratios were noted. The correlation analysis revealed statistically significant relationships (p < 0.05) between: myoglobin and the percentage of leukocyte subpopulations and the granulocyte to lymphocyte ratio; lactate dehydrogenase and the percentage of monocyte; lactate and leukocyte count. In conclusion, the reported muscle damage and inflammatory markers in T3 and T4 indicate the need for fatigue status monitoring in youth soccer players, especially in the competitive period. Moreover granulocyte to lymphocyte and lymphocyte to monocyte ratios proved to be sensitive to fatigue changes and therefore can provide coaches and sport scientists with a broader perspective on the biochemical monitoring of training status in soccer players. (© 2021 Tomasz Podgórski, Jakub Kryściak, Beata Pluta, Jacek Adrian, Jakub Marynowicz, Magdalena Krzykała, Marek Konefał, Paweł Chmura, Jan Chmura, Marcin Andrzejewski, published by Sciendo.)
Databáze:	MEDLINE
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