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Effect of participants' static stretching knowledge or deception on the responses to prolonged stretching.

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  • معلومة اضافية
    • Author-Supplied Keywords:
      force
      hamstrings
      placebo
      rate of force development
      force
      ischio-jambiers
      placebo
      taux de production de la force
      Language of Keywords: English; French
    • Abstract:
      Much of the static stretching (SS) literature reports performance impairments with prolonged SS. However, it has been acknowledged that a limitation of these studies is participants' knowledge or bias. Since many participants have knowledge of the literature, their performance may be subconsciously influenced by expectations. Hence, the objective of this study was to examine the effect of stretching knowledge or deception on subsequent force output following SS. Two groups of male participants who were either aware (BIASED: 14) or unaware (DECEPTION: 14) of the SS literature participated. Unaware participants were misinformed that SS increases force production. Testing involved maximal voluntary isometric contractions (MVC) of the quadriceps and hamstrings at pre-, post-, and 5 min post-intervention (three 30-s passive hamstring stretches to the point of discomfort with 30-s rest intervals) or control. While the DECEPTION group displayed impaired knee flexion force ( p = 0.04; 3.6% and 10.4%) following hamstrings SS, there was no significant impairment with the BIASED (-1.1% and +0.9%) group. Both groups exhibited hamstrings F200 (force produced in the first 200 ms) impairments following SS. Whereas BIASED participants exhibited an overall decrease ( p < 0.05; 1.8% and 4.2%) in knee extension MVC, DECEPTION participants showed ( p = 0.005; 8.8% and 5.1%) force increases. The quadriceps F200 was not significantly affected with the BIASED group but overall there were 4.5% and 8.7% F200 impairments at 1 and 5 min post-intervention ( p = 0.05) with the DECEPTION group. Thus while deception resulted in enhanced quadriceps muscle force output, there was no knowledge or deception advantage when stretching the hamstrings. [ABSTRACT FROM AUTHOR]
    • Abstract:
      La majorité des documents sur l'étirement statique (« SS ») rapporte une diminution de la performance associée à un SS prolongé. Toutefois, il est admis qu'une limite de ces études est le savoir ou le biais des participants. Du fait que plusieurs participants possèdent un savoir documenté, leur performance pourrait être influencée par des attentes inconscientes. Ainsi, le but de cette étude est d'analyser l'effet du savoir relatif à l'étirement ou de sa méprise sur la production de force consécutive à un SS. Deux groupes de sujets masculins au fait (« BIAISED » : 14) ou pas (« DECEPTION » : 14) de la documentation participent à cette étude. On trompe les sujets du groupe DECEPTION en leur disant que SS augmente la force. Avant, immédiatement après et 5 min après l'intervention (3 × 30 s d'étirement passif des ischio-jambiers jusqu'au seuil d'inconfort avec des intervalles de 30 s de repos) ou avant et après la séance de contrôle, on évalue la contraction isométrique maximale volontaire (« MVC ») du quadriceps et des ischio-jambiers. À la suite de SS des ischio-jambiers, le groupe DECEPTION présente une diminution de la force de flexion du genou ( p = 0,04; 3,6 % et 10,4 %); par contre, le groupe BIASED ne présente aucune diminution significative de la force (-1,1 % et +0,9 %). Les deux groupes présentent une diminution de F200 (force produite durant les 200 premières ms) consécutive à SS. Alors que les sujets du groupe BIASED présentent une diminution globale ( p < 0,05; 1,8 % et 4,2 %) de la MVC lors de l'extension du genou, les sujets du groupe DECEPTION présentent une augmentation de la force ( p = 0,005; 8,8 % et 5,1 %). Le groupe BIASED ne présente pas de modification significative de F200 du quadriceps, mais le groupe DECEPTION présente une diminution de F200 de 4,5 % et 8,7 % à la 1re min et à la 5e min suivant l'intervention ( p = 0,05). D'une part, la méprise suscite une amélioration de la force du quadriceps; d'autre part, la connaissance ou la méprise ne procure pas d'avantage lors d'une séance d'étirement des ischio-jambiers. [Traduit par la Rédaction] [ABSTRACT FROM AUTHOR]
    • Abstract:
      Copyright of Applied Physiology, Nutrition & Metabolism is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
    • Author Affiliations:
      1School of Human Kinetics and Recreation, Memorial University of Newfoundland, St. John's, NL A1C 5S7, Canada.
    • ISSN:
      1715-5312
    • Accession Number:
      10.1139/apnm-2016-0241
    • Accession Number:
      118669386
  • Citations
    • ABNT:
      JANES, W. C. I. et al. Effect of participants’ static stretching knowledge or deception on the responses to prolonged stretching. Applied Physiology, Nutrition & Metabolism, [s. l.], v. 41, n. 10, p. 1052–1056, 2016. DOI 10.1139/apnm-2016-0241. Disponível em: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=asn&AN=118669386&custid=s8280428. Acesso em: 29 maio. 2020.
    • AMA:
      Janes WCI, Snow BBG, Watkins CE, Noseworthy EAL, Reid JC, Behm DG. Effect of participants’ static stretching knowledge or deception on the responses to prolonged stretching. Applied Physiology, Nutrition & Metabolism. 2016;41(10):1052-1056. doi:10.1139/apnm-2016-0241.
    • APA:
      Janes, W. C. I., Snow, B. B. G., Watkins, C. E., Noseworthy, E. A. L., Reid, J. C., & Behm, D. G. (2016). Effect of participants’ static stretching knowledge or deception on the responses to prolonged stretching. Applied Physiology, Nutrition & Metabolism, 41(10), 1052–1056. https://doi.org/10.1139/apnm-2016-0241
    • Chicago/Turabian: Author-Date:
      Janes, W.C. Ian, Brandon B.G. Snow, Caisie E. Watkins, Elecia A.L. Noseworthy, Jonathan C. Reid, and David G. Behm. 2016. “Effect of Participants’ Static Stretching Knowledge or Deception on the Responses to Prolonged Stretching.” Applied Physiology, Nutrition & Metabolism 41 (10): 1052–56. doi:10.1139/apnm-2016-0241.
    • Harvard:
      Janes, W. C. I. et al. (2016) ‘Effect of participants’ static stretching knowledge or deception on the responses to prolonged stretching’, Applied Physiology, Nutrition & Metabolism, 41(10), pp. 1052–1056. doi: 10.1139/apnm-2016-0241.
    • Harvard: Australian:
      Janes, WCI, Snow, BBG, Watkins, CE, Noseworthy, EAL, Reid, JC & Behm, DG 2016, ‘Effect of participants’ static stretching knowledge or deception on the responses to prolonged stretching’, Applied Physiology, Nutrition & Metabolism, vol. 41, no. 10, pp. 1052–1056, viewed 29 May 2020, .
    • MLA:
      Janes, W. C.Ian, et al. “Effect of Participants’ Static Stretching Knowledge or Deception on the Responses to Prolonged Stretching.” Applied Physiology, Nutrition & Metabolism, vol. 41, no. 10, Oct. 2016, pp. 1052–1056. EBSCOhost, doi:10.1139/apnm-2016-0241.
    • Chicago/Turabian: Humanities:
      Janes, W.C. Ian, Brandon B.G. Snow, Caisie E. Watkins, Elecia A.L. Noseworthy, Jonathan C. Reid, and David G. Behm. “Effect of Participants’ Static Stretching Knowledge or Deception on the Responses to Prolonged Stretching.” Applied Physiology, Nutrition & Metabolism 41, no. 10 (October 2016): 1052–56. doi:10.1139/apnm-2016-0241.
    • Vancouver/ICMJE:
      Janes WCI, Snow BBG, Watkins CE, Noseworthy EAL, Reid JC, Behm DG. Effect of participants’ static stretching knowledge or deception on the responses to prolonged stretching. Applied Physiology, Nutrition & Metabolism [Internet]. 2016 Oct [cited 2020 May 29];41(10):1052–6. Available from: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=asn&AN=118669386&custid=s8280428