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Heterogeneity of muscle activity during sedentary behavior.

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  • معلومة اضافية
    • Author-Supplied Keywords:
      body composition
      electromyography
      muscle inactivity
      sedentary time
      sitting
      standing
      textile electrodes
      électrodes textiles
      électromyographie
      assis
      composition corporelle
      debout
      inactivité musculaire
      temps sédentaire
      Language of Keywords: English; French
    • NAICS/Industry Codes:
      541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)
      541910 Marketing Research and Public Opinion Polling
    • Abstract:
      Replacing sitting by standing has been hypothesized to reduce the health risks of sitting, based on the assumption that muscles are passive during sitting and active during standing. Interventions have been more effective in overweight (OW) than in normal weight (NW) individuals, but subjects' muscle activities have not been quantified. This study compared quadriceps and hamstring muscle electromyographic (EMG) activity between 57 NW (body mass index (BMI) 22.5 ± 1.5 kg/m2, female n = 36) and 27 OW (BMI 28.4 ± 2.9 kg/m2, female n = 8) subjects during non-fatiguing standing (15 s, EMGstanding) and sitting (30 min). EMG amplitude was normalized to EMG measured during maximal isometric knee extension and flexion (% EMGMVC), and sitting muscle inactivity and bursts were determined using 4 thresholds (60% or 90% EMGstanding and 1% or 2% EMGMVC). Comparisons were adjusted for sex, age, knee extension strength, and the individual threshold. Standing EMG amplitude was 36% higher in OW (1.9% ± 1.5% EMGMVC) than in NW (1.4% ± 1.4% EMGMVC, P < 0.05) subjects. During sitting, muscles were inactive 89.8% ± 12.7% of the measurement time with 12.7 ± 14.2 bursts/min across all thresholds. On average, 6% more activity was recorded in NW than in OW individuals for 3 of the 4 thresholds ( P < 0.05 for 60% or 90% EMGstanding and 1% EMGMVC). In conclusion, the OW group had higher muscle activity amplitude during standing but more muscle inactivity during sitting for 3/4 of the thresholds tested. Interventions should test whether the observed heterogeneity in muscle activity affects the potential to gain cardiometabolic benefits from replacing sitting with standing. [ABSTRACT FROM AUTHOR]
    • Abstract:
      Le remplacement de la position assise par la position debout devrait hypothétiquement diminuer le risque pour la santé, car, selon le postulat, les muscles sont passifs en position assise et actifs en position debout. Les interventions documentées sont plus efficaces chez les personnes en surpoids (« OW ») que chez celles de poids normal (« NW »), mais on n'a pas quantifié l'activité musculaire. Cette étude compare l'activité myoélectrique du quadriceps et des ischio-jambiers chez 57 NW (indice de masse corporelle (« IMC ») 22,5 ± 1,5 kg/m2, n = 36 femmes) et 27 OW (IMC 28,4 ± 2,9 kg/m2, n = 8 femmes) en position debout sans fatigue (15 s, EMGdebout) et assise (30 min). On normalise l'amplitude EMG par rapport à EMGMVC mesurée au cours d'une contraction isométrique maximale du genou en extension et en flexion (% EMGMVC) et on évalue l'inactivité musculaire et les salves en position assise en fonction de quatre seuils : 60 ou 90 % EMGdebout et 1 ou 2 % EMGMVC. On ajuste les comparaisons en fonction du sexe, de l'âge, de la force du genou en extension et des seuils individuels. L'amplitude EMG en position debout est de 36 % plus forte chez OW (1,9 ± 1,5 % EMGMVC) comparativement à NW (1,4 ± 1,4 % EMGMVC, P < 0.05). En position assise, les muscles sont inactifs 89,8 ± 12,7 % du temps mesuré et présentent 12,7 ± 14,2 salves/min pour tous les seuils. On enregistre en moyenne 6 % plus d'activité chez NW par rapport à OW dans 3 des 4 seuils ( P < 0,05 pour 60 ou 90 % EMGdebout et 1 % EMGMVC). En conclusion, les sujets OW présentent une plus grande amplitude d'activité musculaire en position debout, mais plus d'inactivité musculaire en position assise dans 3/4 seuils testés. Les interventions ultérieures devraient vérifier si l'hétérogénéité de l'activité musculaire observée a un impact sur le potentiel d'obtenir des bienfaits cardiométaboliques en substituant la position debout à la position assise. [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:
      1Neuromuscular Research Center, Department of Biology of Physical Activity, P.O. Box 35, FI-40014 University of Jyväskylä, Finland.
      2Department of Sport Sciences, P.O. Box 35, FI-40014 University of Jyväskylä, Finland.
      3Exercise Health and Technology Center, Department of Physical Education, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Minhang District, Shanghai 200240, China.
    • ISSN:
      1715-5312
    • Accession Number:
      10.1139/apnm-2016-0170
    • Accession Number:
      119278549
  • Citations
    • ABNT:
      PESOLA, A. J. et al. Heterogeneity of muscle activity during sedentary behavior. Applied Physiology, Nutrition & Metabolism, [s. l.], v. 41, n. 11, p. 1155–1162, 2016. DOI 10.1139/apnm-2016-0170. Disponível em: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=asn&AN=119278549&custid=s8280428. Acesso em: 23 out. 2020.
    • AMA:
      Pesola AJ, Laukkanen A, Tikkanen O, Finni T. Heterogeneity of muscle activity during sedentary behavior. Applied Physiology, Nutrition & Metabolism. 2016;41(11):1155-1162. doi:10.1139/apnm-2016-0170
    • APA:
      Pesola, A. J., Laukkanen, A., Tikkanen, O., & Finni, T. (2016). Heterogeneity of muscle activity during sedentary behavior. Applied Physiology, Nutrition & Metabolism, 41(11), 1155–1162. https://doi.org/10.1139/apnm-2016-0170
    • Chicago/Turabian: Author-Date:
      Pesola, Arto J., Arto Laukkanen, Olli Tikkanen, and Taija Finni. 2016. “Heterogeneity of Muscle Activity during Sedentary Behavior.” Applied Physiology, Nutrition & Metabolism 41 (11): 1155–62. doi:10.1139/apnm-2016-0170.
    • Harvard:
      Pesola, A. J. et al. (2016) ‘Heterogeneity of muscle activity during sedentary behavior’, Applied Physiology, Nutrition & Metabolism, 41(11), pp. 1155–1162. doi: 10.1139/apnm-2016-0170.
    • Harvard: Australian:
      Pesola, AJ, Laukkanen, A, Tikkanen, O & Finni, T 2016, ‘Heterogeneity of muscle activity during sedentary behavior’, Applied Physiology, Nutrition & Metabolism, vol. 41, no. 11, pp. 1155–1162, viewed 23 October 2020, .
    • MLA:
      Pesola, Arto J., et al. “Heterogeneity of Muscle Activity during Sedentary Behavior.” Applied Physiology, Nutrition & Metabolism, vol. 41, no. 11, Nov. 2016, pp. 1155–1162. EBSCOhost, doi:10.1139/apnm-2016-0170.
    • Chicago/Turabian: Humanities:
      Pesola, Arto J., Arto Laukkanen, Olli Tikkanen, and Taija Finni. “Heterogeneity of Muscle Activity during Sedentary Behavior.” Applied Physiology, Nutrition & Metabolism 41, no. 11 (November 2016): 1155–62. doi:10.1139/apnm-2016-0170.
    • Vancouver/ICMJE:
      Pesola AJ, Laukkanen A, Tikkanen O, Finni T. Heterogeneity of muscle activity during sedentary behavior. Applied Physiology, Nutrition & Metabolism [Internet]. 2016 Nov [cited 2020 Oct 23];41(11):1155–62. Available from: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=asn&AN=119278549&custid=s8280428