Auxotonic contraction意思
"Auxotonic contraction" is a term used in the context of muscle physiology to describe a type of muscle contraction that occurs when a muscle is working against an opposing force that is equal to its own force. In other words, during an auxotonic contraction, the muscle is neither lengthening nor shortening, but rather maintaining its length while exerting force.
This type of contraction is also known as "isometric contraction" because the muscle remains in a fixed position without changing its length. Isometric contractions are important for maintaining posture and for generating force without movement, such as when pushing against a wall or holding a heavy object without lifting it.
In contrast, other types of muscle contractions include:
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Isotonic contractions: These are contractions in which the muscle changes length while generating force, either by lengthening (eccentric contraction) or shortening (concentric contraction).
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Isokinetic contractions: These are contractions in which the muscle generates force while moving at a constant speed, typically achieved through the use of specialized equipment that controls the speed of movement.
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Eccentric contractions: These are isotonic contractions in which the muscle lengthens while generating force, often used to control the speed of movement or to decelerate a limb.
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Concentric contractions: These are isotonic contractions in which the muscle shortens while generating force, typically used to move an object or to accelerate a limb.
Auxotonic contraction is a less commonly used term, and it may be used interchangeably with isometric contraction in some contexts.