Coelho, Daniel BarbosaCabido, Christian Emmanuel TorresCiminelli, Victor Augusto LemosCoelho, Leonardo Gomes MartinsOliveira, Lenice Kappes BeckerPereira, Emerson RodriguesMarins, João Carlos BouzasGarcia, Emerson Silami2017-08-102017-08-102016COELHO, D. B. et al. Comparison of different ways of expressing creatine kinase concentration of soccer players during a competitive season. Motriz: Revista de Educação Física, v. 22, p. 160-165, 2016. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1980-65742016000300160>. Acesso em: 29 ago. 2017.1980-6574http://www.repositorio.ufop.br/handle/123456789/8518The aim of this study was to analyze the responses of creatine kinase [CK] expressed in different forms to the training load of professional soccer players during a competitive season. Twelve players (age, 24 ± 4 years) participated in the study. [CK] was analyzed before the pre-season (Pre), after the pre-season (Post), and in the competitive mesocycles (M1, M2, and M3). Results showed [CK] in the Pre, Post, M1, M2, and M3 phases in absolute values (181.3 ± 58.7, 416.4 ± 155.7, 526.4 ± 268.0, 403.8 ± 137.0, and 442.5 ± 212.3 U/L, respectively), relative values (16.3 ± 4.6, 39.5 ± 19.1, 47.8 ± 20.1, 37.5 ± 14.2, 40.1 ± 17.4 %CKmáx, respectively), and values relative to the variation delta (19.9 ± 3.6, 48.1 ± 26.5, 57.0 ± 23.2, 45.1 ± 17.7, and 48.3 ± 22.0 %ΔCKmáx, respectively). [CK] was lower only during the Pre phase compared to the other phases (p < 0.05). [CK] was expressed as %CKmáx or %ΔCKmáx may be more specific to monitor training. In addition, the individualization of this biomarker optimizes the athletes’ performance as muscle injuries can be prevented.en-USabertoPhysical exertionTrainingPerformanceComparison of different ways of expressing creatine kinase concentration of soccer players during a competitive season.Artigo publicado em periodicoOs trabalhos publicados no periódico Motriz. Journal of Physical Education estão sob Licença Creative Commons que permite copiar, distribuir e transmitir o trabalho desde que sejam citados o autor e o licenciante. Fonte: Motriz. Journal of Physical Education <http://www.scielo.br/scielo.php?script=sci_serial&pid=1980-6574&lng=en&nrm=iso>. Acesso em: 24 set. 2019.http://dx.doi.org/10.1590/S1980-6574201600030006