Abstract
The purpose of this study was to compare 2 different of typical bench press(type 1: support ground, type 2: support bench) with electromyogram analysis technique and to show the muscle activation properties of pectoralis major. This study conducted an experiment with 10 young men in school K university who have never done weight training experience(n = 10 ; mean height 176.40 ± 4.75 cm ; mass 72.80 ± 7.30kg ; age 20.5 ± 1.90years). We monitored activation of muscle using surface electromyography when weight lifting performed 5 times of bench press at 75% of 1RM. Paired t-test was used to identify significant differences between type 1 and type 2. An alpha level of .05 was used to determine the significance level. We analyzed activation of pectoralis major during bench press. The results of analysis were as follows; Firstly, activation of left pectoralis major was a significant change in p.05 level statiscally in electromyogram of supported types. Secondly, total pectoralis major muscle was not a significant change p.05 level statistically in electromyogram of two position.
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