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Titolo:
Effects of length on the catchlike property of human quadriceps femoris muscle
Autore:
Lee, SCK; Gerdom, ML; Binder-Macleod, SA;
Indirizzi:
Univ Delaware, Dept Phys Therapy, Interdisciplinary Grad Program Biomech &Movement, Newark, DE 19716 USA Univ Delaware Newark DE USA 19716 Biomech &Movement, Newark, DE 19716 USA Univ Delaware, Dept Phys Therapy, Phys Therapy Program, Newark, DE 19716 USA Univ Delaware Newark DE USA 19716 s Therapy Program, Newark, DE 19716 USA
Titolo Testata:
PHYSICAL THERAPY
fascicolo: 8, volume: 79, anno: 1999,
pagine: 738 - 748
SICI:
0031-9023(199908)79:8<738:EOLOTC>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN SKELETAL-MUSCLE; MOTOR UNITS; STIMULATED CONTRACTIONS; EXCITATION-FREQUENCY; CALCIUM TRANSIENTS; FORCE OUTPUT; FATIGUE; ACTIVATION; VOLUNTARY; RESPONSES;
Keywords:
catchlike property; fatigue; functional electrical stimulation; human quadriceps femoris muscle; muscle length;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Binder-Macleod, SA Univ Delaware, Dept Phys Therapy, Interdisciplinary Grad Program Biomech &Movement, 315 McKinly Lab, Newark, DE 19716 USA Univ Delaware 315 McKinly Lab Newark DE USA 19716 6 USA
Citazione:
S.C.K. Lee et al., "Effects of length on the catchlike property of human quadriceps femoris muscle", PHYS THER, 79(8), 1999, pp. 738-748

Abstract

Background and Purpose. Recent reports have suggested that electrical stimulation trains that take advantage of the catchlike property of skeletal muscle can produce higher forces from skeletal muscle than traditionally usedconstant-frequency trains. This study investigated the effects of catchlike-inducing trains on human quadriceps femoris muscles while the knee joint was held at 15 degrees of flexion. Subjects and Methods. Subjects (N=12) were tested with constant-frequency trains that had interpulse intervals ranging from 10 to 160 milliseconds and comparable catchlike-inducing trains. Data were collected during the control condition (1 train every 10 seconds) and during repetitive contractions (1 train per second). Results. During control and repetitive activation conditions, catchlike-inducing trains produced approximately 5% to 110% greater peak forces than comparable constant-frequency trains, depending on the frequencies being compared. Total forces produced (ie, force-time integrals) were increased up to 59% and 49% duringthe control and repetitive activation conditions, respectively. Conclusionand Discussion. These results support earlier findings that catchlike-inducing trains may be advantageous in functional electrical stimulation applications.

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Documento generato il 05/07/20 alle ore 13:31:25