Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
The effects of voluntary contraction intensity and gender on perceived exertion during isokinetic quadriceps exercise
Autore:
Pincivero, DM; Coelho, AJ; Campy, RM; Salfetnikov, Y; Bright, A;
Indirizzi:
Eastern Washington Univ, Dept Phys Therapy, Human Performance & Fatigue Lab, Cheney, WA 99004 USA Eastern Washington Univ Cheney WA USA 99004 gue Lab, Cheney, WA 99004 USA Eastern Washington Univ, Dept Phys Educ Hlth & Recreat, Cheney, WA 99004 USA Eastern Washington Univ Cheney WA USA 99004 Recreat, Cheney, WA 99004 USA
Titolo Testata:
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 3, volume: 84, anno: 2001,
pagine: 221 - 226
SICI:
1439-6319(200103)84:3<221:TEOVCI>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUBMAXIMAL EFFORT; GROUP-III; GROUP-IV; MUSCLE; RELIABILITY; PERFORMANCE; DYNAMOMETER; DIFFERENCE; PERCEPTION; STRENGTH;
Keywords:
quadriceps; RPE; isokinetic; gender; strength;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: Pincivero, DM Eastern Washington Univ, Dept Phys Therapy, Human Performance & Fatigue Lab, 526 5th St,Mail Stop 4, Cheney, WA 99004 USA Eastern Washington Univ 526 5th St,Mail Stop 4 Cheney WA USA 99004
Citazione:
D.M. Pincivero et al., "The effects of voluntary contraction intensity and gender on perceived exertion during isokinetic quadriceps exercise", EUR J A PHY, 84(3), 2001, pp. 221-226

Abstract

The objectives of the present study were to: (1) examine perceived exertion across different target voluntary contraction intensities, (2) compare perceived exertion ratings with actual target intensities, and (3) compare perceived exertion ratings between males and females. The subjects for this study included 30 healthy, college-aged male (n = 15) and female (n = 15) volunteers. All subjects were free of orthopedic, cardiopulmonary, systemic and neurological disease. Each subject completed five maximal isokinetic, concentric quadriceps contractions in a seated position at 60 degrees (.) s(-1) to determine their single, highest peak torque. All subjects then completed, in a random order, 3-5 submaximal isokinetic contractions at 10%, 20%,30%, 40%, 50%, 60%, 70%, 80%, and 90% of their single, highest peak torque. Each relative contraction level (i.e., percentage) was achieved by havingthe subjects attempt to match the peak of their torque curve to a horizontal line on a computer monitor. Perceived exertion was measured by asking the subjects to provide a number that corresponded to the feelings in their quadriceps during exercise by viewing a modified category-ratio (CR-10) scale. The results of a two-factor (gender x intensity) analysis of variance revealed a significant, intensity main effect F-8.232 = 92.19, P < 0.001, <eta>(2) = 0.77, 1-beta = 0.99) and no significant gender main effect (F-8,F-232 = 2.66, P = 0.11, eta (2) = 0.09, 1-beta =0.35) Or interactions (F8,232 = 1.01, P = 0.43, eta (2) = 0.04, 1-beta =0.46). The findings of this studydemonstrate that perceived exertion is significantly (P < 0.05) different from the specific target values on the CR-10 scale at 10%, and 50-90% maximum voluntary contraction. The results revealed that the increase in perceived exertion across the contraction intensities could be fit to both linear (F-1,F-29 = 205.41, P < 0.001, eta (2) = 0.88, 1-beta = 0.99) and quadratic(F-1,F-29 = 10.05, P = 0.004, eta (2) = 0.26, 1-beta = 0.87) trends. Thesefindings suggest that perceived exertion is underestimated during submaximal isokinetic exercise, and is not different between males and females.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 11:38:42