четверг, 4 октября 2012 г.

30 day core challenge

30 day core challenge
30 day core challenge
It might seem like a lot to build up to, but you’ll be surprised by how quickly you can improve your strength and help your running.

If you are unsure of any of the exercises, click the links below for how to videos.


Original article and pictures take therunningbug.com site

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