Comparação da atividade eletromiográfica de músculos do tronco em diferentes figuras de pole dance com trava de joelho

Abstract

Pole Dance is a physical activity that uses friction and opposition between the body and a vertical bar and requires great isometric contraction of the core muscles so that practitioners remain in the plastic figures that make up an acrobatic or choreographic sequence. The objective was to evaluate the electromyographic activity (EMG) of the rectus abdominis muscles – superior part (RAS) and erector spinae (EE) in different Pole Dance movements using knee lock to fix the body on the bar. Seven Pole Dance practitioners participated in the study, all of whom were considered physically active or very active and able to perform the proposed exercises. To carry out the study, the EMG activity of the RAS and EE muscles was recorded during the performance of three Pole Dance exercises (Indian - IN, Genius - GE and Monkey - MO) and during maximal isometric strength exercises, quantified in the maximum voluntary isometric contraction (MVIC). To capture the electromyographic signals, surface electrodes made up of two Ag/AgCl disks were used. The volunteers performed each of the exercises twice during a period of five seconds and with a rest period of two minutes between each one. The electromyographic signal obtained during all exercises was quantified in the time domain by the root mean square (RMS) and the maximum normalized values (RMSn) by the maximum voluntary isometric contraction (MVIC). The results showed that the levels of electromyographic activation of the RAS and EE muscles were significantly higher in the GE exercise and considered moderate. The results can facilitate the selection of exercises aiming at a possible progression in the training and performance in Pole Dance, in addition to being able to be prescribed in order to increase muscular resistance and neuromuscular control of the trunk, contributing to the vertebral column to support greater loads and decrease micromovements (instability) of spinal joints and, consequently, decrease the risk of injury and contribute to improved health.