A mecânica nos aparelhos de musculação

Abstract

The search for a healthy life, diseases prevention, body and esthetical care are currently on high. People are looking for a non-pharmacologic health improvement through exercise, such as weight training or another practices. The practice of physical exercises at the gym today finally is part of all social classes people routine. Health benefits of physical exercise are scientifically proven. At closed spaces, physical exercises are usually realized with mechanical instruments, which will be the focus of this work. In this research, we selected ten devices available at Espaço Saúde Academia, from Roque Gonzales, to exert an analysis of their mechanics. This location was chosen for the ease and free access by the researchers and for being the only gym in the city and, consequently, the only available devices in the city. We seek to represent the musculation equipment’s functioning typically available at gyms and discover the nexus between the specifications described on the device and the force that must be exerted to keep it suspended or to realize its movement. We know that this review can help Physical Education professionals when their students execute the exchange of exercises in mechanical equipment for exercises with free weights, since commonly beginners start from device due to their safety. Moreover, we believe that this analysis will be useful like educative material for physics teachers of the Basic Education and essential subjects of Mechanics of the Advanced Education. For a simplifeistion of the first analysis, we developed a study considering systems in static equilibrium and concluded that all the equipment has a mechanic that affect in the force that the user will perform when compared to the scale described on the weight training device. At last, in a parsing of the dynamics of basic systems of fixed and movable pulleys, from an estimate of typical acceleration in the accomplishment of the weight training exercises, we demonstrated that the difference of effort performed by the user to move the system does not necessarily need to be considered if compared to the necessary effort to keep the weight plate suspended in balance.