News tagged with muscle strength

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Obesity creates wimpy rats

(Medical Xpress) -- Obesity appears to impair normal muscle function in rats, an observation that could have significant implications for humans, according to Penn State researchers.

May 09, 2011
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Muscling in on multiple sclerosis

Multiple sclerosis (MS), a neurodegenerative disease, causes periodic attacks of neurologic symptoms such as limb weakness and mobility defects. And while MS patients' walking abilities and muscle strength are examined on ...

Jan 26, 2012
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Muscle (from Latin musculus, diminutive of mus "mouse") is the contractile tissue of the body and is derived from the mesodermal layer of embryonic germ cells. Muscle cells contain contractile filaments that move past each other and change the size of the cell. They are classified as skeletal, cardiac, or smooth muscles. Their function is to produce force and cause motion. Muscles can cause either locomotion of the organism itself or movement of internal organs. Cardiac and smooth muscle contraction occurs without conscious thought and is necessary for survival. Examples are the contraction of the heart and peristalsis which pushes food through the digestive system. Voluntary contraction of the skeletal muscles is used to move the body and can be finely controlled. Examples are movements of the eye, or gross movements like the quadriceps muscle of the thigh. There are two broad types of voluntary muscle fibers: slow twitch and fast twitch. Slow twitch fibers contract for long periods of time but with little force while fast twitch fibers contract quickly and powerfully but fatigue very rapidly.

This text uses material from Wikipedia, licensed under CC BY-SA

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