Composición corporal y el efecto de un programa de fuerza auxiliar para prevenir lesiones en músculos cuádriceps femoral, isquiotibiales y bíceps femoral en jóvenes universitarios futbolistas

The objective of this research was to determine the effects of a program of auxiliary force in the prevention of injuries to muscles: quadriceps femoris, hamstrings and biceps femoris in college football players of the city of Madrid, independent of the normal training program of university club. Twenty-four college players aged 19–28 years participated in the study, divided into experimental group (n=12) and control group (n= 12). In both groups, the displacement and the velocity (potency) were initially assessed through a motion transducer or "encoder". Then in experimental group was implemented a program of auxiliary force for 6 months. The Ethics/Bioethics Committee at the Universidad of Tarapacá, approved the protocols of this research. The results shown in the experimental group, with program of auxiliary forces a significant increase in gain strength/potency, relative to the control group, expressed in watts (1187.6±110.4 vs. 1011.6±110.4 respectively), the percentage recovery of force was 16.8% in the experimental group and 0.1larger than bifurcation aneurysms until they 7% in the control group. The percentage of injured players in the experimental group was significantly lower than the control group (16.6% and 50% respectively). We conclude that preventive programs auxiliary force in football players 19 and 28 years are effective in preventing muscle injuries by the considerable gain strength/potency, providing great economic and sporting benefits. Therefore it is recommended include these programs of auxiliary force in all sports clubs.