Thursday, July 24, 2008

Types of Muscle

One way to classify muscles is to divide them into three groups: skeletal, smooth and cardiac. Each of these muscle types have different types of cells.

Skeletal muscle, also called voluntary muscle, is attached to bone by tendons and moves the b ones. Skeletal muscles usually move by conscious control.

Smooth muscles lines organs such as the stomach and the intestines. It is under involuntary control.

Cardiac muscle is found only in the heart. This type of muscle, and skeletal muscle are striated. They are made up of sarcomeres which are multi-protein complexes that are myofibril units, composed of three different filament systems.
In skeletal muscle, sarcomeres are arranged into regularly-arranged bundles. Smooth muscle is arranged in uneven irregular angles or intercalated discs. Compared to smooth muscle, skeletal muscle contracts in bursts. Smooth muscle contracts in longer, more steady contractions.

For the past several blog posts, I have not created exercise programs. Look to past posts or search by muscle group, and you will find them!

Disclaimer: None of the above information can be taken as a substitute for advice from a medical professional, such as a physician.

My third book, Pocket Guide to Fitness, is available on,, and If you look up my name on those Web sites, you will find my other books The Boy in a Wheelchair and Life, Work and Play: Poems and Short Stories.

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