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. 2017 Feb 23;6(1):16. doi: 10.3390/antiox6010016

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© 2017 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Menstrual phase comparison of the absolute serum creatine kinase (CK) activity pre- and post downhill running expressed as mean ± SD (a); and the magnitude of CK response post downhill running showing the individual data and average (---) change relative to pre-exercise and 95% confidence interval for early follicular (EF) group (b); late follicular (LF) group (c) and mid-luteal (ML) group (d). # and ### denotes a significant difference relative to pre-exercise (−20 min) within a group, p < 0.05 and p < 0.001, respectively.

Menstrual phase comparison of the absolute serum creatine kinase (CK) activity pre- and post downhill running expressed as mean ± SD (a); and the magnitude of CK response post downhill running showing the individual data and average (---) change relative to pre-exercise and 95% confidence interval for early follicular (EF) group (b); late follicular (LF) group (c) and mid-luteal (ML) group (d). # and ### denotes a significant difference relative to pre-exercise (−20 min) within a group, p < 0.05 and p < 0.001, respectively.