MUSCULAR SYNERGISM DURING CORE STABILITY EXERCISES

The aim of this study was to compare the myoelectric activity and synergism of Core region muscles among exercises commonly prescribed for Core training. The myoelectric activity of seven men was collected and the activation ratio among lumbar erector spinae (LES), lumbar multifidus (MT), external oblique (EO) and rectus abdominis (RA) were compared among eight exercises. The results suggest that EO has higher activation during frontal bridge, side bridge and “bird dog” exercises, RA has higher activation during frontal and side bridge, while LES and MT demonstrated higher activation during “bird dog” and double leg and single leg back bridge. We concluded that to train all muscles groups in a synergic way, in different postures, it should be prescribed at least one variation of the exercises that presents the flexor, lateral flexor and extensor pattern

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

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