Abstract
The study aimed to measure the electrical activity (mean and peak) of the pectoralmajormuscle of the right and left sidein bench press exercise using the free weights and Smith machine to identify the differences in the electrical activity in the intensity (50%, 75%, and 100%) of (1RM). The researcher used the experimental method. The subject was four students who are practicing weightlifting sport in the Collegeof Physical Education and Sports Sciences / University of Baghdad. Theirbody masswere(69.38 ± 5.56) kg, height(171.52 ± 1.15) cm, and age (20.25 ± 2.25) years. Bench press test was performed on the flat level, and then the same previous test carried outagain, but using Smithmachinewith the intensity of (50%, 75%, and 100%) of (1RM)for both tests. The researchersused the SPSS to obtain theresults by usingt-test for independent samples. Theresults did not show significant differences between the right and left pectoral major muscle in sEMG signal(mean and peak) when using free weights and smith machine.The increasing in the electrical activity (mean and peak) associated with increasing in intensity for both pectoral major muscle. therustles showed significant differences in the right pectoral major musclefor using free weight, and a significant differences in the left pectoral major musclefor using smith machine. The researchersrecommended the use of smith machineor free weights to develop the pectoral major muscle
Keywords
bench press exercise
Free Weights
pectoral major muscle
sEMG
Smith Machine
Abstract
The study aimed to measure the electrical activity (mean and peak) of the pectoralmajormuscle of the right and left sidein bench press exercise using the free weights and Smith machine to identify the differences in the electrical activity in the intensity (50%, 75%, and 100%) of (1RM). The researcher used the experimental method. The subject was four students who are practicing weightlifting sport in the Collegeof Physical Education and Sports Sciences / University of Baghdad. Theirbody masswere(69.38 ± 5.56) kg, height(171.52 ± 1.15) cm, and age (20.25 ± 2.25) years. Bench press test was performed on the flat level, and then the same previous test carried outagain, but using Smithmachinewith the intensity of (50%, 75%, and 100%) of (1RM)for both tests. The researchersused the SPSS to obtain theresults by usingt-test for independent samples. Theresults did not show significant differences between the right and left pectoral major muscle in sEMG signal(mean and peak) when using free weights and smith machine.The increasing in the electrical activity (mean and peak) associated with increasing in intensity for both pectoral major muscle. therustles showed significant differences in the right pectoral major musclefor using free weight, and a significant differences in the left pectoral major musclefor using smith machine. The researchersrecommended the use of smith machineor free weights to develop the pectoral major muscle
Keywords
bench press exercise
Free Weights
pectoral major muscle
sEMG
Smith Machine