DIFFERENCES IN THE FREQUENCY OF MYOELECTRIC ACTIVATION OF LOWER LIMBS BETWEEN SINGLE AND DOUBLE LEG LANDINGS IN MALES

  • G. Leporace
  • D. Chagas
  • L. Metsavaht
  • G. Pereira
  • J. Praxedes
  • A. Batista
  • J. Nadal
Keywords: landing tasks, ACL injury, male athletes, EMG, time-frequency domain

Abstract

The frequency of myoelectric activation seems to be related to the recruitment of different motor units (Wakeling, 2009). Fast muscle fibers are responsible to the production of higher forces related to the slow fibers (Wakeling, 2009). Therefore, the pattern of activation of some muscles could be associated to the risk of injuries (Bealieau et al., 2008). However, it is not well described whether the muscular activation, in the time-frequency domain, used by males in tasks with different mechanical stresses would truly be related to the strategies of protection of the ACL. The aim of this research was to compare the instantaneous median frequency (IMF) of the EMG signal of lower limbs muscles between different landing tasks in males.