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Titolo:
Maximal voluntary force and rate of force development in humans - importance of instruction
Autore:
Sahaly, R; Vandewalle, H; Driss, T; Monod, H;
Indirizzi:
Inst Natl Sports & Educ Phys, Lab Biomecan & Physiol, F-75012 Paris, France Inst Natl Sports & Educ Phys Paris France F-75012 F-75012 Paris, France Univ Paris 06, Lab Physiol Travail & Sport, F-75013 Paris, France Univ Paris 06 Paris France F-75013 ravail & Sport, F-75013 Paris, France Univ Paris 10, Unite Format & Rech Sci & Tech Act Phys Sportives, F-92001 Nanterre, France Univ Paris 10 Nanterre France F-92001 portives, F-92001 Nanterre, France
Titolo Testata:
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 3-4, volume: 85, anno: 2001,
pagine: 345 - 350
SICI:
1439-6319(200108)85:3-4<345:MVFARO>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
LEG EXTENSOR MUSCLES; TIME; CONTRACTIONS; WOMEN;
Keywords:
maximal voluntary force; rate of force development; dynamometry; muscle strength; bilateral deficit;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Vandewalle, H Inst Natl Sports & Educ Phys, Lab Biomecan & Physiol, 11 AveTremblay, F-75012 Paris, France Inst Natl Sports & Educ Phys 11 Ave Tremblay Paris France F-75012
Citazione:
R. Sahaly et al., "Maximal voluntary force and rate of force development in humans - importance of instruction", EUR J A PHY, 85(3-4), 2001, pp. 345-350

Abstract

The present investigation has been designed to confirm the effect of instruction (hard-and-fast instruction compared to fast instruction) upon maximal voluntary isometric force (MVF) and maximal rate of force development (MRFD) in muscle groups which differ with regards to muscle mass and usage. Inaddition, we took advantage of the force data collected during unilateral and bilateral leg extension, to compare the instruction effects on the indices of the bilateral deficits (BI, the differences between the data collected during bilateral extensions and the sum of the data collected during unilateral left and right extensions) with regard to MVF (BIMVF) and MRFD (BIMRFD). Force-time curves were recorded during maximal isometric contractionsof the elbow flexors, the leg extensors of the take-off and lead legs and during bilateral leg extension in 26 healthy young male volunteers from thetrack-and-field national team of Tunisia. In the first protocol, the subjects were instructed to produce MFV as hard-and-fast as possible (instruction I). In the second protocol (instruction II) the subjects were instructed to provide MFRD, that is the most explosive force, by concentrating on the fastest contraction without concern for achieving maximal force. The present study confirmed the importance of an appropriate instruction for the measurement of MRDF. The MRFD (F=40.8, P<0.001) were significantly higher when measured after instruction II compared to instruction I. The effect of the instruction upon MRFD were similar for muscle groups with different volumes, cortical representations and uses. The same results (F=52.1; P<0.001) were observed when MRFD was related to MVF [MRFD%=(MRFD/MVF)x100]. On the other hand, MVF was similar following both instructions (ANOVA, F=0.562; P=0.454). Moreover, the results of the present study suggested that the effect ofinstruction was significantly larger for BIMRFD than for BIMVF.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/01/20 alle ore 07:30:52