http://pecworkout.net/what-is-the-most-crucial-muscle-for-a-jumper.php Build Pec Muscle Quickly And Safely Thu, 24 May 2012 00:10:33 +0000 hourly 1 http://wordpress.org/?v=3.3.2 http://pecworkout.net/what-is-the-most-crucial-muscle-for-a-jumper.php/comment-page-1#comment-212 lestermount Fri, 11 Dec 2009 05:35:28 +0000 http://pecworkout.net/what-is-the-most-crucial-muscle-for-a-jumper.php#comment-212 The primary muscles would be the quadriceps group, and the calf muscles. However you are correct in that it takes your entire body and almost all of the muscles to jump. The primary muscles would be the quadriceps group, and the calf muscles. However you are correct in that it takes your entire body and almost all of the muscles to jump.

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