Evolutionarily – the man, first of all, has to be strong. On his shoulders both catching of a mammoth, and successful "transportation" to a cave, and protection of the family against enemies. Today catching of a mammoth is not relevant, but whether means it that men do not need to worry about the physical force more?
The horizontal bar and bars are the simplest shells which are used in trainings. That on them to be engaged, not obligatory to go to the hall as in many yards there are platforms with these exercise machines. Trainings on a horizontal bar and bars allow to load the main groups of muscles, for example, hips, a biceps, a triceps, etc. Regularly being engaged, it is possible to get rid of extra kilos, to increase the muscular volume and relief of a body.