Uncoupling ofin vivotorque production from EMG in mouse muscles injured by eccentric contractions
نویسندگان
چکیده
منابع مشابه
Eccentric exercise increases EMG amplitude and force fluctuations during submaximal contractions of elbow flexor muscles.
The purpose of this study was to determine the effect of eccentric exercise on the ability to exert steady submaximal forces with muscles that cross the elbow joint. Eight subjects performed two tasks requiring isometric contraction of the right elbow flexors: a maximum voluntary contraction (MVC) and a constant-force task at four submaximal target forces (5, 20, 35, 50% MVC) while electromyogr...
متن کاملWhen Active Muscles Lengthen : Properties and Consequences of Eccentric Contractions
exceeds that produced by the muscle, it will lengthen. Lengthening, or eccentric, muscle contractions have a surprisingly long history in physiological studies. (Note that this word was first introduced as “excentric” by Asmussen in 1953. This original spelling is more enlightening as it combines the prefix ex, “from or away,” with centric, “center,” hence a muscle contraction that is moving aw...
متن کاملWhen active muscles lengthen: properties and consequences of eccentric contractions.
exceeds that produced by the muscle, it will lengthen. Lengthening, or eccentric, muscle contractions have a surprisingly long history in physiological studies. (Note that this word was first introduced as “excentric” by Asmussen in 1953. This original spelling is more enlightening as it combines the prefix ex, “from or away,” with centric, “center,” hence a muscle contraction that is moving aw...
متن کاملEccentric contractions disrupt FKBP12 content in mouse skeletal muscle
Strength deficits associated with eccentric contraction-induced muscle injury stem, in part, from impaired voltage-gated sarcoplasmic reticulum (SR) Ca(2+) release. FKBP12 is a 12-kD immunophilin known to bind to the SR Ca(2+) release channel (ryanodine receptor, RyR1) and plays an important role in excitation-contraction coupling. To assess the effects of eccentric contractions on FKBP12 conte...
متن کاملMechanisms of enhanced force production in lengthening (eccentric) muscle contractions.
In contrast to isometric and shortening contractions, many observations made on actively lengthening muscles cannot be readily explained with the sliding filament and cross-bridge theory. Specifically, residual force enhancement, the persistent increase in force following active muscle lengthening, beyond what one would expect based on muscle length, has not been explained satisfactorily. Here,...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 1999
ISSN: 0022-3751
DOI: 10.1111/j.1469-7793.1999.609ac.x