The objective of this study was to investigate the effect of running versus cycling exercises upon serum S100B levels and typical markers of skeletal muscle damage such as creatine kinase (CK), aspartate aminotransferase (AST) and myoglobin (Mb). Although recent work demonstrates that S100B is highly expressed and exerts functional properties in skeletal muscle, there is no previous study that tries to establish a relationship between muscle damage and serum S100B levels after exercise. We conducted a cross-sectional study on 13 male triathletes. They completed 2 submaximal exercise protocols at anaerobic threshold intensity. Running was performed on a treadmill with no inclination (RUN) and cycling (CYC) using a cycle-simulator. Three blood samples were taken before (PRE), immediately after (POST) and 1 h after exercise for CK, AST, Mb and S100B assessments. We found a significant increase in serum S100B levels and muscle damage markers in RUN POST compared with RUN PRE. Comparing groups, POST S100B, CK, AST and Mb serum levels were higher in RUN than CYC. Only in RUN, the area under the curve (AUC) of serum S100B is positively correlated with AUC of CK and Mb. Therefore, immediately after an intense exercise such as running, but not cycling, serum levels of S100B protein increase in parallel with levels of CK, AST and Mb. Additionally, the positive correlation between S100B and CK and Mb points to S100B as an acute biomarker of muscle damage after running exercise.

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ResumoO principal intuito dos periódicos científicos é difundir para a comunidade científica os resultados de pesquisas por meio de suas publicações. A frequência com que o tema "Atividade Física" (AF) se faz presente nas publicações especializadas permite avaliar a consolidação da AF enquanto área da saúde no Brasil. O objetivo deste estudo foi descrever a frequência do tema da Atividade Física e Saúde (AFS) junto aos principais periódicos nacionais vinculados á área de Educação Física (EF). Este foi um estudo descritivo de screening dos termos da AFS junto aos periódicos científicos brasileiros nos anos de 2003; 2008 e 2013. Comparando as publicações da área de AFS com as demais áreas da EF, observou-se um aumento absoluto dos estudos indexados nos periódicos pesquisados (313%) entre 2003 e 2013. No entanto, a frequência relativa ficou estável no decênio (19,3%), apontando também, uma evolução da produção científica de outras áreas da EF (desempenho, educação, práticas pedagógicas entre outras) nestes periódicos. PalavRas-chaveAtividade motora; Saúde pública; Índice de periódicos; Portais de acesso a revistas científicas. abstRactThe main purpose of scientific journals is to disseminate to the scientific community the results of scientific research through its publications. The frequency that the topic Physical Activity (PA) is present in specialized publications evaluates the consolidation of PA as the health area in Brazil. The aim of the study was describe the frequency of the issue of Physical Activity and Health (PAH) with leading national journals linked to the area of Physical Education (PE). This was a descriptive study, the terms of screening of PAH at Brazilian scientific journals in 2003;2008 and2013. Comparing the publications area of PAH with other areas of PE, there was an absolute increase of studies indexed in periodicals surveyed (313%) between 2003 and 2013, however, the relative frequency was stable in the decennary (19.3%), also pointing an evolution of scientific production from other areas of PE (performance, education, pedagogical practices among others) in these journals.

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