摘要：The aim of this study was to compare the time under tension (TUT), the electromyographic activity (EMG), and the lactate levels (LAC) between 8, 10, and 12RM in the bench press exercise. Eleven physically active men participated in this study. The TUT was verified through kinematics. After 48 hrs, the subjects performed the exercise with the TUT and the load obtained in the tests with the evaluation of EMG and LAC. ANOVA revealed significant differences in all protocols in the TUT and LAC variables (P<0.05) in ascending order to the number of repetitions (8<10<12RM). The pectoralis major muscle (sternocostal part) presented higher EMG signal for the 12RM compared to the 8 and 10RM protocol. The pectoralis major (clavicular part) presented a lower EMG signal for the 12RM protocol. However, the deltoid and triceps brachii did not show any difference in the EMG response. The findings indicate that the control of the volume/intensity ratio and the prescription in the repetition ranges of the exercise proposed can be performed based on the TUT.
