Abstract
The aim of this study was to compare the electric activity of muscles trapezius upper fibers, pectoralis major sternocostal portion and latissimus dorsi in basic movements of tennis forehand, backhand and serve during the phases of beginning, acceleration and end. The sample was composed by had twenty right handed male volunteers (10 tennis players and 10 non-tennis players) ranging in age from 20 to 30 years; body mass index from 15% to 29%. It was used a 8 channel electromyograph (VIKING II) and surface minielectrodes (Beckman). A metronome indicated the exact time of each step of the movement. The software SISDIN provided the data from the electromyographic activity in Root Mean Square (RMS), expressed in microvolts (µV). Analysis of variance (ANOVA) and Tukey’s test as post-hoc were applied. The results showed that, regardless the movement and step of the movement, tennis players had higher electric activity than non- tennis players in all muscles studied; so no statistical difference was found between tennis players and control group. In conclusion, the electric activity in the movements of forehand, backhand and serve varied according to the muscle studied. The higher electric activity shown by tennis players may be explained by their better adaptation and greater intensity they employed in those movements.
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