Isotonic contraction
Isotonic Contraction
Isotonic contraction (/aɪsoʊˈtɒnɪk kənˈtrækʃən/) is a type of muscle contraction where the muscle changes in length while maintaining a constant tension.
Etymology
The term "isotonic" is derived from the Greek words "iso-", meaning equal, and "tonos", meaning tension. "Contraction" comes from the Latin "contractio", meaning a drawing together.
Definition
In an isotonic contraction, the muscle length changes as the muscle tension remains constant. This type of contraction is typically associated with movements of the body where the resistance to the movement remains constant. There are two types of isotonic contractions: concentric contraction and eccentric contraction.
In a concentric contraction, the muscle shortens as it contracts, such as when lifting a weight. In an eccentric contraction, the muscle lengthens as it contracts, such as when lowering a weight.
Related Terms
- Muscle Contraction: The process where muscle fibers produce tension and contract in response to a stimulus.
- Concentric Contraction: A type of muscle contraction where the muscle shortens as it contracts.
- Eccentric Contraction: A type of muscle contraction where the muscle lengthens as it contracts.
- Isometric Contraction: A type of muscle contraction where the muscle length remains constant and the tension changes.
See Also
External links
- Medical encyclopedia article on Isotonic contraction
- Wikipedia's article - Isotonic contraction
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