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Medicina is published by MDPI from Volume 54 Issue 1 (2018). Articles in this Issue were published by another publisher in Open Access under a CC-BY (or CC-BY-NC-ND) licence. Articles are hosted by MDPI on mdpi.com as a courtesy and upon agreement with Lithuanian Medical Association, Lithuanian University of Health Sciences, and Vilnius University.
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Medicina 2017, 53(4), 285-293; https://doi.org/10.1016/j.medici.2017.08.001 (registering DOI)

Functional and biochemical adaptations of elite level futsal players from Brazil along a training season

1
Instituto de Ciências Biológicas, Programa de Pós-graduação em Bioexperimentação, Universidade de Passo Fundo, Passo Fundo, RS, Brazil
2
Laboratório de Bioquímica do Exercício, Centro de Educação Física e Desportos, Programa de Pós-Graduação em Educação Física, Universidade Federal de Santa Maria (UFSM), Santa Maria, Rio Grande do Sul, Brazil
3
Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas (CCNE), Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil
4
Associação Carlos Barbosa de Futsal (ACBF), Carlos Barbosa, Rio Grande do Sul, Brazil
5
Laboratório de Pesquisa em Bioquímica Clínica, Departamento de Análises Clínicas e Toxicológicas, Centro de Ciências da Saúde, Universidade Federal de Santa Maria (UFSM), Santa Maria, Rio Grande do Sul, Brazil
6
Grupo de Investigación en Rendimiento Físico y Salud (IRyS), Escuela de Educación Física, Pontificia Universidad Católica de Valparaiso, Valparaiso, Chile
These two authors contributed equally to the manuscript.
*
Author to whom correspondence should be addressed.
Received: 2 November 2016 / Revised: 8 August 2017 / Accepted: 14 August 2017 / Published: 26 August 2017
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Abstract

Background and objective: Although hard training is mandatory in elite level futsal training, few studies have proposed a biochemical follow up in futsal players during a whole season. Therefore, the aim of this study was to compare functional and biochemical markers in Brazilian elite level futsal players throughout a competition season.
Materials and methods: Eight players aged 25.5 ± 5.4 years were evaluated at three time points: preseason (T1), immediately before the FIFA®-Intercontinental-Futsal-Cup (T2), and at the end of the season (T3), with a tapering period of 1 week before T2. Functional parameters (weight, height, body fat, VO2max, heart rate, and distance ran) and blood sampling for cell count and lipid profile (cholesterol, HDL-C, LDL-C, triglycerides) were assessed at each time point. After, a Yo-Yo R2 test was carried out in each time point (T1, T2 and T3) and blood samples to assess skeletal muscle damage (creatine kinase [CK], lactate dehydrogenase [LDH]), inflammation (C-reactive protein [CRP]) and oxidative stress markers (ischemia modified albumin [IMA], and advanced oxidation protein products [AOPP]) were obtained before and after the tests.
Results: Although functional parameters did not change throughout the season, greater total number of erythrocytes (P ≤ 0.05), and hemoglobin (P ≤ 0.05) were found at T2 compared to T1. Similarly, lower LDH (P ≤ 0.05) and CK (P ≤ 0.05) levels were found at T2 compared to T1. CPR levels were also decreased at T2 in comparison to T1 both before and after Yo-Yo R2 test (P ≤ 0.05), while IMA and AOPP levels showed only a season effect (P ≤ 0.05).
Conclusions: The tapering strategy was successful considering players presented lower levels of muscle damage, inflammation and oxidative stress makers before T2, which preceded the main championship of the year. These results are of great relevance, considering the team won the FIFA®-Intercontinental-Futsal-Cup, which happened at T2. Thus, it seems that routine-based biochemical markers may be useful as training control means in this population. View Full-Text
Keywords: Elite futsal; Intense training; Muscle damage; Oxidative stress; Inflammation Elite futsal; Intense training; Muscle damage; Oxidative stress; Inflammation
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Barcelos, R.P.; Tocchetto, G.L.; Lima, F.D.; Stefanello, S.T.; Rodrigues, H.F.M.; Sangoi, M.B.; Moresco, R.N.; Royes, L.F.F.; Soares, F.A.A.; Bresciani, G. Functional and biochemical adaptations of elite level futsal players from Brazil along a training season. Medicina 2017, 53, 285-293.

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