Muscle Contraction

s

s

<object width="420" height="315"><param name="movie" value="http://www.youtube.com/v/HZWCJc69QAI?version=3&amp;hl=en_US&amp;rel=0"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/HZWCJc69QAI?version=3&amp;hl=en_US&amp;rel=0" type="application/x-shockwave-flash" width="420" height="315" allowscriptaccess="always" allowfullscreen="true"></embed></object>

<object width="420" height="315"><param name="movie" value="http://www.youtube.com/v/CepeYFvqmk4?version=3&amp;hl=en_US&amp;rel=0"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/CepeYFvqmk4?version=3&amp;hl=en_US&amp;rel=0" type="application/x-shockwave-flash" width="420" height="315" allowscriptaccess="always" allowfullscreen="true"></embed></object>


s