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Titolo:
Re-examination of training effects by electrostimulation in the human elbow musculoskeletal system
Autore:
Colson, S; Martin, A; Van Hoecke, J;
Indirizzi:
Univ Bourgogne, UFR STAPS Dijon, Grp Analyse Mouvement, F-21078 Dijon, France Univ Bourgogne Dijon France F-21078 yse Mouvement, F-21078 Dijon, France
Titolo Testata:
INTERNATIONAL JOURNAL OF SPORTS MEDICINE
fascicolo: 4, volume: 21, anno: 2000,
pagine: 281 - 288
SICI:
0172-4622(200005)21:4<281:ROTEBE>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
NEUROMUSCULAR ELECTRICAL-STIMULATION; TORQUE-VELOCITY RELATIONSHIPS; QUADRICEPS FEMORIS MUSCLE; MECHANICAL-PROPERTIES; TRICEPS SURAE; EXCITATION-FREQUENCY; VASTUS LATERALIS; KNEE EXTENSION; CO-ACTIVATION; FIBER TYPES;
Keywords:
electrostimulation training; co-activation; torque/angular velocity relationships; torque/angular relationships; EMG; electrical and mechanical twitches;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
50
Recensione:
Indirizzi per estratti:
Indirizzo: Colson, S Univ Bourgogne, UFR STAPS Dijon, Grp Analyse Mouvement, BP 27 877, F-21078Dijon, France Univ Bourgogne BP 27 877 Dijon France F-21078 1078Dijon, France
Citazione:
S. Colson et al., "Re-examination of training effects by electrostimulation in the human elbow musculoskeletal system", INT J SP M, 21(4), 2000, pp. 281-288

Abstract

This study examines the effects of a 7 weeks sub-maximal training period of electrostimulation on the maximal isometric, concentric, eccentric voluntary torque and muscle contractile properties of the elbow flexor muscles ofnine subjects. The daily program consisted of five series of six 6-s isometric actions (60 to 70% of maximal isometric voluntary action) at an elbow angle of 90 degrees. After training the maximal voluntary isometric flexiontorque increased significantly whereas the maximal voluntary isometric extension torque decreased significantly. Increases in isometric flexion torque were linked to an increase of the myoelectrical activity of the biceps brachii muscle. Under dynamic conditions flexion torque was significantly increased throughout the whole spectrum of angular velocities. These changes were accompanied by an increase in the myoelectrical activity of the agonistmuscle under eccentric conditions and at two fast concentric angular velocities, without modifications of the myoelectrical activity of the antagonist muscle. The analysis of the electrical and mechanical twitches indicated that modifications of the muscle membrane electrical activity were also present at the muscle level. These results indicate that torque gains were attributed to neural adaptations and/or to a modification of the relative partof agonist and antagonist muscles in elbow flexion torque production.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 05:01:20