摘要：Pimentel I, Bezerra E, Ceselles D, Rossato M, Machado J, Lazarri C, Paz G, Miranda H, Moro A. Smith Machine vs. Barbell: Ten Repetition Maximum Loads and Muscle Activation Pattern during Upper Body Exercises. JEPonline 2016;19(5):86-92. The aim of this study was to investigate muscle activation performance and maximum repetition test for the bench press, military press and the close-grip bench press exercises with the barbell and the Smith Machine. Twelve recreationally trained men (mean ± SD: 21.83 ± 4.5 yrs; 1.72 ± 0.1 cm; 80.3 ± 9.2 kg; 25.1 ± 2.96 kg·m -2 ; 17.3 ± 6.85 %Fat) underwent a within-subject, randomized and counterbalanced repeated-measures to analyze the 10-RM strength and muscle activation in the bench press, military press, and the close-grip bench press. Electromyographic signals were collected for the pectoralis major, anterior deltoid, biceps brachii, and triceps brachii during 1 set of each exercise with the barbell and smith machine. No difference was observed in muscle activity for pectoralis major, anterior deltoid, biceps brachii, and triceps brachii when comparing the barbell and the Smith Machine (P>0.05). However, significant differences in 10-RM loads were observed between the barbell and the Smith Machine for the close-grip bench press and military press exercises. These finding should be important when considering the determination of training loads.
