Functionally Fit Personal Training's Comment Board

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Riddleback

May 15, 2009 1:52 AM

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Functionally Fit Person…

Sep 17, 2007 2:03 AM

A Z-Line (from everything I have ever heard of) is a line within a muscle indicating the end of a sarcomere (the basic functional unit of a muscle). Each end of the sarcomere has a Z-Line and when a muscle contracts the Actin and Myosin slide across eachother bringing the two Z-Lines closer together (causing muscle contraction). Hope this helps...
Riddleback

Sep 16, 2007 11:43 PM

I am not sure if you know this but I figured you'd be the best for me to ask, what is a Z-Line? I know it has something to do with the esophagus, but what exactly is it? The reason I ask is because I (apparently) have an irregular one...
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