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. 2013 Sep 6;8(9):e74227. doi: 10.1371/journal.pone.0074227

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© 2013 Laudani et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Percentage coactivation of the biceps femoris muscle during the knee extension maximal voluntary contraction (MVC) and of the vastus lateralis muscle during knee flexion MVC in the high (HPAi; n: 19), medium (MPAi; n: 32) and low (LPAi; n: 21) PA intensity clusters. Data are expressed as means ± SD. *significantly different from MPAi; ^†significantly different from HPAi.