Pode o limiar de fadiga neuromuscular ser determinado por testes curtos e não exaustivos?

Autores

  • Eduardo Bodnariuc Fontes University of Campinas. Faculty of Physical Education. Campinas, SP. Brazil.
  • Alexandre Hideki Okano Federal University of Rio Grande do Norte. Natal, RN. Brazil.
  • Bruno de Paula Smirmaul University of Campinas. Faculty of Physical Education. Campinas, SP. Brazil.
  • Leandro Ricardo Altimari State University of Londrina. Londrina, PR. Brazil.
  • Ezequiel Moreira Gonçalves University of Campinas. Faculty of Medical Science. Campinas, SP. Brazil.
  • Ricardo Okada Triana University of Campinas. Faculty of Physical Education. Campinas, SP. Brazil.
  • Antonio Carlos de Moraes University of Campinas. Faculty of Physical Education. Campinas, SP. Brazil.

DOI:

https://doi.org/10.1590/1980-0037.2012v14n3p254

Resumo

The present study determined the neuromuscular fatigue threshold (NFT) using four different time-periods of analysis of the electromyographic signal and compared these estimations with critical power (CP). Fifteen healthy young men (73.6 ± 5.1 kg, 177.8 ± 7.0 cm, 23.4 ± 5.2 years) performed 3-4 different severe constant workload trials until exhaustion on a cycle ergometer with simultaneous SEMG signals acquisition. The obtained data permitted NFT estimation with four different periods of analysis as follows: initial 30s (T30), 1min (T1), 2min (T2) and total time (TT), as well as CP. T30 and T1 were significantly higher than TT and CP and, T2 and TT did not differ between each other, and both were significantly higher than CP. In addition, TT was significantly correlated to CP (0.72; P < 0.05) and to T2 (0.58; P < 0.05). We conclude that NFT overestimates CP, independent of the time-period analysis used for its determination.

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Publicado

2012-04-30

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