Investigation of Biomechanics and Physiology Aspects for The Bench Press Training Niken Ari Safitri, Adrianus Inu Natalisanto, and Rahmawati Munir*)
Physics Department Faculty of Mathematics and Natural Science, Mulawarman University, Jl. Barong Tongkok No.4 Gn Kelua Campus, Samarinda 75123 Indonesia
Abstract
Bench press exercise is a form of powerlifting exercise to train the strength and endurance the muscles of human body. This exercise functions to develop the power of upper body muscles, like the shoulder, arm and chest muscles using an external burden, namely a barbell. We have been investigated the impotrance of biomechanics and Physiology aspects for bench press exercise. This work aims to investigate the effective angle (alpha) needed in lifting weights with the smallest thrust (biomechanics aspects) and determine the value of the minimum energy consumption required in performing the bench press movement (physiology aspects). The research steps were carried out in four stages, namely: firstly, designing biomechanics mathematical equations and determining physiological parameters. Secondly, experiments on people doing bench press movements. Thirdly, processing biomechanics data and physiology data. Lastly, analysis and discussion of biomechanics data and physiology data. Based on the results of the study, by analyzing the thrust to lift the barbell obtained an effective angle that is the angle flank by the upper arm with the lower arm is about 89-114 degree who use the smallest thrust on the grip 0.4 m- 0.5 m- and 0.6 m. The minimum energy consumption in performing bench press movements is obtained by 0.18 kcal/min at a mass of 30 kg- 0.81 kcal/min at a mass of 40 kg- 0.60 kcal/min at a mass of 50 kg- and 0.40 kcal/min at a mass of 60 kg. It can be concluded that the wider the distance between the grips, the greater the thrust required and in bench press sports activities the energy consumption is relatively light so the person observed can still do other day activities.
