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Titolo:
Motor impairment in the human hand following eccentric exercise
Autore:
Leger, AB; Milner, TE;
Indirizzi:
Queens Univ, Sch Rehabil Therapy, Kingston, ON K7L 3N6, Canada Queens Univ Kingston ON Canada K7L 3N6 rapy, Kingston, ON K7L 3N6, Canada Simon Fraser Univ, Sch Kinesiol, Burnaby, BC V5A 1S6, Canada Simon Fraser Univ Burnaby BC Canada V5A 1S6 , Burnaby, BC V5A 1S6, Canada
Titolo Testata:
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 3, volume: 84, anno: 2001,
pagine: 213 - 220
SICI:
1439-6319(200103)84:3<213:MIITHH>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
INDUCED MUSCLE DAMAGE; SKELETAL-MUSCLE; CONTRACTIONS; SORENESS; STIFFNESS; FATIGUE; FORCE; ELECTROMYOGRAM; ADAPTATION; ANTAGONIST;
Keywords:
muscle injury; movement; stability; finger;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Leger, AB Queens Univ, Sch Rehabil Therapy, Kingston, ON K7L 3N6, Canada Queens Univ Kingston ON Canada K7L 3N6 ston, ON K7L 3N6, Canada
Citazione:
A.B. Leger e T.E. Milner, "Motor impairment in the human hand following eccentric exercise", EUR J A PHY, 84(3), 2001, pp. 213-220

Abstract

Motor impairment was induced by having subjects perform two sets of 50 maximal contractions, using the first dorsal interosseus (FDI) muscle to abduct the index finger, while the muscle was being stretched. Tests were conducted prior to the exercise (pre-exercise) and 24 h following the exercise (post-exercise). There were declines of 19% in maximal abduction torque and 15% in maximal flexion torque at the metacarpapha-langeal joint, during isometric contraction post-exercise compared to pre-exercise. The ability to stabilize the metacarpophalangeal joint about the abduction/adduction axis was reduced by 14% post-exercise? and the variability in tracking an isometric torque target increased by 30%. There was a decrement of 7%-10% in the median frequency of the power density spectrum of FDI electromyogram (EMG) throughout a 60 s maintained abduction at 50% maximal voluntary contraction. The mean rectified EMG, on the other hand, increased by 100%-175% for torque levels below 40% of maximal voluntary contraction? post-exercise. The results were consistent with preferential injury of type II muscle fibres in FDI. Although non-exercised synergist muscles appeared to be inhibited during maximal voluntary flexion, there was evidence that they compensated for injured FDI muscle fibres during maintained contraction at sub-maximal flexion torque.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 23:00:47