Heart rate variability and surface electromyography of trained cyclists at different cadences

  • Bruno Saraiva Study Group in Exercise Physiology of Federal University of Rondônia, Porto Velho, Rondonia, Brazil
  • Ester Silva Federal University of Sao Carlos, Sao Carlos, Sao Paulo, Brazil
  • Rodrigo Polaquini Simões Federal University of Sao Carlos, Sao Carlos, Sao Paulo, Brazil
  • Ana Paula Urdiales Garcia Federal University of Sao Carlos, Sao Carlos, Sao Paulo, Brazil
  • Fabrício Augusto Menegon Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil.
  • Daniel Iwai Sakabe Federal University of Sao Carlos, Sao Carlos, Sao Paulo, Brazil
  • Rodrigo Lício Ortolan Federal Institute of Education, Science and Technology South of Minas Gerais, Poços de Caldas, Minas Gerais, Brazil.
  • Luiz Eduardo Barreto Martins State University of Campinas, Campinas, Sao Paulo, Brazil
  • Lucien Oliveira Federal University of Sao Carlos, Sao Carlos, Sao Paulo, Brazil
  • Aparecida Maria Catai Federal University of Sao Carlos, Sao Carlos, Sao Paulo, Brazil

Abstract

The heart rate variability (HRV) and surface electromyography (sEMG) are important tools in the evaluation of cardiac autonomic system and neuromuscular parameters, respectively. The aim of the study was to evaluate the behavior of HRV and sEMG of the vastus lateralis in two exercise protocols on a cycle ergometer at 60 and 80 rpm. Eight healthy men cyclists who have trained for at least two years were evaluated. Reduction was observed followed by stabilization of RMSSD and SDNN indices of HRV (p<0.05) along with increases in the amplitude of the sEMG signal (p<0.05) in both protocols. Significant correlations were observed between the responses of HRV and sEMG in the cadence of 60 rpm (RMSSD and sEMG: r = -0.42, p=0.03; SDNN and sEMG: r = -0.45, p=0.01) and 80 rpm (RMSSD and sEMG: r = -0.47, p=0.02; SDNN and sEMG: r = -0.49, p=0.01), yet no difference was observed for these variables between the two protocols. We concluded that the parasympathetic cardiac responses and sEMG are independent of cadences applied at the same power output.

Author Biographies

Bruno Saraiva, Study Group in Exercise Physiology of Federal University of Rondônia, Porto Velho, Rondonia, Brazil
Department of Physiology
Ester Silva, Federal University of Sao Carlos, Sao Carlos, Sao Paulo, Brazil
Department of Physiotherapy, Cardiovascular  Physiotherapy Laboratory, Nucleus of Research in Physical Exercise,
Rodrigo Polaquini Simões, Federal University of Sao Carlos, Sao Carlos, Sao Paulo, Brazil
Department of Physiotherapy, Cardiovascular  Physiotherapy Laboratory, Nucleus of Research in Physical Exercise,
Ana Paula Urdiales Garcia, Federal University of Sao Carlos, Sao Carlos, Sao Paulo, Brazil
Department of Physiotherapy, Cardiovascular  Physiotherapy Laboratory, Nucleus of Research in Physical Exercise,
Fabrício Augusto Menegon, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil.
Department of Public Health
Daniel Iwai Sakabe, Federal University of Sao Carlos, Sao Carlos, Sao Paulo, Brazil
Department of Physiotherapy, Cardiovascular  Physiotherapy Laboratory, Nucleus of Research in Physical Exercise,
Luiz Eduardo Barreto Martins, State University of Campinas, Campinas, Sao Paulo, Brazil
Laboratory of Exercise Physiology, Faculty of Physical Education,
Lucien Oliveira, Federal University of Sao Carlos, Sao Carlos, Sao Paulo, Brazil
Department of Physiotherapy, Cardiovascular  Physiotherapy Laboratory, Nucleus of Research in Physical Exercise,
Aparecida Maria Catai, Federal University of Sao Carlos, Sao Carlos, Sao Paulo, Brazil
Department of Physiotherapy, Cardiovascular  Physiotherapy Laboratory, Nucleus of Research in Physical Exercise,
Published
2016-06-24
Section
Original Article