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. 2017 Sep 20;7(2):159–168. doi: 10.1016/j.jshs.2017.09.009

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© 2018 Published by Elsevier B.V. on behalf of Shanghai University of Sport.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Fig. 2 — Concentration of the plasma bone turnover markers (A) osteocalcin, (B) carboxy-terminal type-1 collagen crosslinks (CTX-1), (C) procollagen type-1 amino-terminal propeptide (P1NP), and (D) sclerostin in elite football-trained young men (FTY), untrained young men (UY), lifelong football-trained elderly men (FTE), and untrained elderly men (UE). **p < 0.01, ***p < 0.001, compared with UE; ^##p < 0.01, ^###p < 0.001, compared with UY; ^†††p < 0.001, compared with FTE; ^§§§p < 0.001, compared with FTY.