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eccentric contraction, a type of muscle contraction that occurs as the muscle fibers lengthen, such as when a weight is lowered through a range of motion.The contractile force generated by the muscle is weaker than an opposing force, which causes the muscle to stretch.Compare concentric contraction. type of muscle contraction that occurs as the muscle fibers lengthen, such as when a weight is lowered through a range of motion. The contractile force generated by the muscle is weaker than an opposing force, which causes the muscle to stretch. Compare concentric contraction.
This suggests that skeletal muscles are very resistant to lengthening. The basic mechanics of eccentric contractions are still a source of debate since the cross-bridge theory that so nicely describes concentric contractions is not as successful in describing eccentric contractions. Eccentric contractions are currently a very popular area of study for three main reasons: First, much of a muscle's normal activity occurs while it is actively lengthening, so that eccentric contractions are physiologically common (Goslow et al. 1973; Hoffer et al. 1989) Second ...