Abstract
The purpose of the study was to verify the veracity of the following beliefs: 1-Resistance and endurance training are incompatible. 2-Resistance training reduces flexibility. 3-Split body routines are more effective than full-body routines. 4-Resistance training is not useful neither in weight loss programs, nor to change body composition. The following databases were searched: ProQuest, Google Scholar, Scopus, ScienceDirect and Web of Science. The selection criteria were: a) Articles written in Spanish or in English b) Primary research following an experimental or quasi-experimental methodology c) Written between 2015 and 2019, except for section 2 and 3, which was extended until 2000 and 1990 respectively, due to the shortage of publications d) The target population of study were healthy adults who did not practice sports at the professional or semi-professional level e) Papers which include only adaptations achieved through training interventions. Once the studies were analyzed, it was concluded that in healthy adults: 1-The combination of resistance and endurance training is compatible. 2-Strength training does not decrease flexibility, and it could even improve it. 3-On the basis of existing studies, split and full-body routines are equally effective in improving strength. Full-body routines could generate higher muscle hypertrophy. 4-Strength training is effective in improving body composition, and could make a positive impact on cardiovascular and metabolic biomarkers.