eccentric contraction


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Related to eccentric contraction: Isotonic contraction

eccentric contraction

[ek¦sen·trik kən′trak·shən]
(biophysics)
The increase in tension that occurs in a muscle as it lengthens.
References in periodicals archive ?
Non-adenosine triphosphate-dependent mechanical rupture of actin-myosin cross-bridges could explain the lesser energy utilization in an eccentric contraction relative to concentric contraction.
Although possible in insolated muscle preparations [9], eccentric contractions are difficult to elicit and control through stimulation in clinical situations [10].
Research has shown that after severe eccentric contractions that are followed by muscle soreness, muscle fibrils, connective tissues around fibers, the plasma membrane of muscle fibrils, sarcomeres, sarcoplasmic reticulum, or a combination of these parts are damaged, leading to special biochemical and functional symptoms in the individual [8].
Studies have shown that, out of these contractions, the greater ability to generate force is achieved by the eccentric contraction, then by the isometric one and the least by the concentric one, while if we compare the effect to energy consumption, the best performance is achieved by the isometric contraction, followed by the eccentric one.
Eccentric contractions may also stimulate tendon cells to produce collagen and decrease neovascularization that contributes to pain.
1) These injuries usually occur in males in their fourth to sixth decade of life and are the result of a sudden, forceful eccentric contraction of the biceps muscle.
After a slight pause with continued tension, the spotter pulls back slowly--again, with great care--while the lifter gives enough resistance to ensure an even, gradual eccentric contraction to the starting position.
Eccentric contraction utilizes extensibility and occurs as the muscle lengthens.
Selective damage of fast glycolytic muscle fibres with eccentric contraction of the rabbit tibialis anterior.
Subsequently, the muscle is also more vulnerable to rupture during an eccentric contraction.
It is slowly releasing tension, which is termed eccentric contraction.
In each eccentric contraction, the elbow joint was forcibly extended from a flexed (90[degrees]) to a fully extended (180[degrees]) position in 1 second.