Summary: Olympian Carrie Tollefson shows you how to maximize your workout with proper plank form! Planks are a great way to strengthen your core and back.<br><br>Links in this episode: <br> <ul></ul><br>This episode brought to you by: <br> <ul> <li><a href="http://www.mtectiming.com">Mtec Results</a></li> <li><a href="http://www.grandmasmarathon.com">Grandma's Marathon</a></li> <li><a href="http://www.fitsok.com/">Fitsok</a></li> </ul>
