The main purpose of this research was to design a program of functional work exercises to strengthen the core in cargo operators of the company merkafruver in the city of Guadalajara de Buga in 2020, which had a quantitative, cross-sectional approach with descriptive scope and non-experimental design. The results of the initial test showed that the loading operators had very low levels of resistance strength in the core muscles, for this reason, a bibliographic analysis was carried out in which the types of training and the most appropriate methods for strengthening the core, taking into account the functionality of the loading operators, with the results of the analysis and the bibliographic review it was possible to conclude that an integrated functional method is a very suitable way of training the core, since when training movements and not muscles Isolated, more specific actions are carried out by loading operators, and this population also performs basic movement patterns, which are closely related to the characteristics of functional training.