eccentric muscle contraction


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Related to eccentric muscle contraction: isometric muscle contraction, concentric muscle contraction

eccentric muscle contraction

Lengthening of the muscle as it contracts against resistance. Lowering the body from a position in which the body was supported by the flexed arms, i.e., holding onto a bar above the head, is such a contraction.
See also: contraction

ec·cen·tric mus·cle con·trac·tion

(ek-sen'trik mŭs'ĕl kŏn-trak'shŭn)
Increase in muscle tone during lengthening of the muscle such that the muscle opposes, but does not stop, movement. Movement is controlled, as in the opening of the jaw.
References in periodicals archive ?
On the other hand, while concentric contractions, here stimulated by the uphill treadmill exercise, show lower power outputs and less micro-lesions than eccentric contractions, it has been known since the early nineteen fifty's (Abbot et al., 1952; Asmunssen, 1953) that concentric contractions increase the metabolic demands, pH, temperature and oxygen pressure more than eccentric muscle contractions.
Creatine supplementation failed to significantly influence indices elbow flexor muscle damage or rate of muscle recovery following eccentric muscle contractions. Following a bout of unaccustomed eccentric exercises with the elbow flexor muscles no significant differences were seen between muscle force loss and rate of recovery or muscle soreness between control, placebo or creatine supplemented groups over the 96 hr recovery period.
However, the Shake Weight[R] movement appears more similar to isometric contractions of the involved muscles, as opposed to the alternating concentric and eccentric muscle contractions used with isotonic free weight training.
(1997) Indices of skeletal muscle damage and connective tissue breakdown following eccentric muscle contractions. European Journal of Applied Physiology and Occupational Physiology 75, 369-374.