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Myoelectrical and mechanical changes linked to length specificity during isometric training

Myoelectrical and mechanical changes linked to length specificity during isometric training MATERIALS AND METHODS ; electromyogram; torque-angle relationship elbow flexor muscles; the 1950s long after Milos de Crotone’s “natural ,” a systematic method muscular strengthening began to appear within the sportsman’s physical program. Numerous works (3, 15) describe the various methods used in strengthening. Nevertheless, the nature the physiological phenomena underlying the increase performance remains a subject discussion (6) The improvement in maximal strength after muscle reinforcement could be due to one or all the following adaptations: 1) a metabolic transformation muscle fibers, including changes enzymes, capillary network, structure, and area the fibers; 2) an adaptation neuromuscular function, with greater maximal muscle excitation; and 3) an adaptation the force-length, force-velocity relationship through changes the mechanical characteristics the muscular tissue and for the number sarcomeres. A few authors have suggested that strength gain is specific to the angle at which the takes place. Among them, Gardner (5), as well as Zaciorsky and Rajcin (30), using two positions the knee, showed a greater improvement maximal voluntary contraction (MVC) at the position. Furthermore, Zaciorsky and Rajcin (30) claimed that the strength increase was all the more significant since the was carried DURING 1500 0161-7567/88 $1.50 Copyright Subjects. Three experimental groups, each comprising http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Physiology The American Physiological Society

Myoelectrical and mechanical changes linked to length specificity during isometric training

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Publisher
The American Physiological Society
Copyright
Copyright © 1988 the American Physiological Society
ISSN
8750-7587
eISSN
1522-1601
Publisher site
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Abstract

MATERIALS AND METHODS ; electromyogram; torque-angle relationship elbow flexor muscles; the 1950s long after Milos de Crotone’s “natural ,” a systematic method muscular strengthening began to appear within the sportsman’s physical program. Numerous works (3, 15) describe the various methods used in strengthening. Nevertheless, the nature the physiological phenomena underlying the increase performance remains a subject discussion (6) The improvement in maximal strength after muscle reinforcement could be due to one or all the following adaptations: 1) a metabolic transformation muscle fibers, including changes enzymes, capillary network, structure, and area the fibers; 2) an adaptation neuromuscular function, with greater maximal muscle excitation; and 3) an adaptation the force-length, force-velocity relationship through changes the mechanical characteristics the muscular tissue and for the number sarcomeres. A few authors have suggested that strength gain is specific to the angle at which the takes place. Among them, Gardner (5), as well as Zaciorsky and Rajcin (30), using two positions the knee, showed a greater improvement maximal voluntary contraction (MVC) at the position. Furthermore, Zaciorsky and Rajcin (30) claimed that the strength increase was all the more significant since the was carried DURING 1500 0161-7567/88 $1.50 Copyright Subjects. Three experimental groups, each comprising

Journal

Journal of Applied PhysiologyThe American Physiological Society

Published: Apr 1, 1988

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