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Neuromuscular fatigue threshold, critical power and anaerobic work capacity under caffeine ingestion.

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  • معلومة اضافية
    • Subject Terms:
    • Author-Supplied Keywords:
      anaerobic capacity
      caffeine
      electromyography
      ergogenic substances
      fatigue
    • NAICS/Industry Codes:
      325411 Medicinal and Botanical Manufacturing
      713940 Fitness and Recreational Sports Centers
      541910 Marketing Research and Public Opinion Polling
    • Abstract:
      The present study examined the effects of acute ingestion of caffeine on the rate of increase of electromyographic signal (EMGslope), neuromuscular fatigue threshold (NFT), critical power (CP) and anaerobic work capacity (AWC). Eight males (25.7 ± 3.4 years; 82.0 ± 9.1kg; 180.2 ± 5.4cm) performed four constant-load bouts on a cycle ergometer until exhaustion under two different conditions: caffeine (6mg. kg-1) and placebo. The trials were performed at 80%, 90%, 100% and 110% (Trial80%, Trial90%, Trial100% and Trial110%,) respectively of peak power output determined by a maximal incremental test. The EMGslope was compared from the superficial quadriceps muscles, time to exhaustion, as well as NFT, CP and AWC estimated in both conditions. The caffeine ingestion showed higher time to exhaustion (12-17%) for Trial100% and Trial110% (P<0.05), but no significant changes were observed for EMGslope (P>0.05). Thus neither NFT nor CP changed, but AWC improved (~23%) significantly during the caffeine condition. It is concluded that caffeine ingestion did not affect the EMGslope, NFT and CP in physically active adult males; however, AWC increased, detecting the caffeine effects on anaerobic capacity. [ABSTRACT FROM AUTHOR]
    • Abstract:
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    • Author Affiliations:
      1GPNeurom - Laboratory of Electromyography Studies, FEF - State University of Campinas (UNICAMP), SP, Brazil
      2Faculty of Medical Sciences, State University of Campinas (UNICAMP), SP, Brazil
      3Group of Studies and Research of Metabolism, Nutrition and Exercise State University of Londrina (UEL), Brazil
      4Group of Study and Research in Neuromuscular System and Exercise, CEFE - State University of Londrina (UEL), PR, Brazil
      5Group of Study and Research in Integrative Biology of Exercise, CCS - Federal University of Rio Grande do Norte (UFRN), RN, Brazil
    • ISSN:
      1528-3356
    • Accession Number:
      84335602
  • Citations
    • ABNT:
      MOREIRA GONALVES, E. et al. Neuromuscular fatigue threshold, critical power and anaerobic work capacity under caffeine ingestion. International SportMed Journal, [s. l.], v. 11, n. 4, p. 380–388, 2010. Disponível em: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=asn&AN=84335602&custid=s8280428. Acesso em: 9 abr. 2020.
    • AMA:
      Moreira Gonalves E, Bodnariuc Fontes E, de Paula Caraa Smirmaul B, et al. Neuromuscular fatigue threshold, critical power and anaerobic work capacity under caffeine ingestion. International SportMed Journal. 2010;11(4):380-388. http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=asn&AN=84335602&custid=s8280428. Accessed April 9, 2020.
    • APA:
      Moreira Gonalves, E., Bodnariuc Fontes, E., de Paula Caraa Smirmaul, B., Okada Triana, R., Hideki Okano, A., Guerra-Junior, G., de Moraes, A. C., & Altimari, L. R. (2010). Neuromuscular fatigue threshold, critical power and anaerobic work capacity under caffeine ingestion. International SportMed Journal, 11(4), 380–388.
    • Chicago/Turabian: Author-Date:
      Moreira Gonalves, Ezequiel, Eduardo Bodnariuc Fontes, Bruno de Paula Caraa Smirmaul, Ricardo Okada Triana, Alexandre Hideki Okano, Gil Guerra-Junior, Antonio Carlos de Moraes, and Leandro Ricardo Altimari. 2010. “Neuromuscular Fatigue Threshold, Critical Power and Anaerobic Work Capacity under Caffeine Ingestion.” International SportMed Journal 11 (4): 380–88. http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=asn&AN=84335602&custid=s8280428.
    • Harvard:
      Moreira Gonalves, E. et al. (2010) ‘Neuromuscular fatigue threshold, critical power and anaerobic work capacity under caffeine ingestion’, International SportMed Journal, 11(4), pp. 380–388. Available at: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=asn&AN=84335602&custid=s8280428 (Accessed: 9 April 2020).
    • Harvard: Australian:
      Moreira Gonalves, E, Bodnariuc Fontes, E, de Paula Caraa Smirmaul, B, Okada Triana, R, Hideki Okano, A, Guerra-Junior, G, de Moraes, AC & Altimari, LR 2010, ‘Neuromuscular fatigue threshold, critical power and anaerobic work capacity under caffeine ingestion’, International SportMed Journal, vol. 11, no. 4, pp. 380–388, viewed 9 April 2020, .
    • MLA:
      Moreira Gonalves, Ezequiel, et al. “Neuromuscular Fatigue Threshold, Critical Power and Anaerobic Work Capacity under Caffeine Ingestion.” International SportMed Journal, vol. 11, no. 4, Dec. 2010, pp. 380–388. EBSCOhost, search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=asn&AN=84335602&custid=s8280428.
    • Chicago/Turabian: Humanities:
      Moreira Gonalves, Ezequiel, Eduardo Bodnariuc Fontes, Bruno de Paula Caraa Smirmaul, Ricardo Okada Triana, Alexandre Hideki Okano, Gil Guerra-Junior, Antonio Carlos de Moraes, and Leandro Ricardo Altimari. “Neuromuscular Fatigue Threshold, Critical Power and Anaerobic Work Capacity under Caffeine Ingestion.” International SportMed Journal 11, no. 4 (December 2010): 380–88. http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=asn&AN=84335602&custid=s8280428.
    • Vancouver/ICMJE:
      Moreira Gonalves E, Bodnariuc Fontes E, de Paula Caraa Smirmaul B, Okada Triana R, Hideki Okano A, Guerra-Junior G, et al. Neuromuscular fatigue threshold, critical power and anaerobic work capacity under caffeine ingestion. International SportMed Journal [Internet]. 2010 Dec [cited 2020 Apr 9];11(4):380–8. Available from: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=asn&AN=84335602&custid=s8280428