Análise da razão de força isométrica entre RL/RM em atletas de handebol com e sem GIRD e não atletas

Abstract

Introduction: Owing to the large forces generated during the throwing motion, players impos an excessive stress on the glenohumeral joint, making the shoulder sufferable adaptations, which may be a risk factor for the development of injuries. The Glenohumeral Internal Rotation (GIRD) is one of these adaptations, it is a reduction in the range of motion (ROM) of medial rotation in the dominant shoulder when compared to the non-dominant. In addition to range of motion changes, muscle imbalances often occur in throwing players. The imbalance between the forces of medial rotators and lateral rotators are generally associated with the GIRD and are considered together with the other changes, factors that predispose to injury. Objective: to compare the rotador strength ratio RL/RM between athletes with and without GIRD and non-athletes, also analyzing whether there are differences between the dominant and non-dominant sides. Methodology: this is a cross-sectional study, developed in the Physiotherapy Department of the UFRN. A total of 47 individuals participated in the study, of both sexes, aged between 18 and 35 years, handball athletes and healthy individuals who did not practice throwing. After an initial assessment of range of motion (WMD), the athletes were divided into two groups Group Athletes without GIRD (GASG), composed of 16 athletes, Group Athletes with GIRD (GACG), composed of 16 athletes. Non-athletes were allocated to the non-athletes group (GNA), composed of 15 individuals, thus forming 3 distinct groups. It was performed in all groups the isometric evaluation of the rotador strength ratio (RM/RL). The data from this sample was analyzed using the software SPSS 20.0 (Statistical Package for the Social Sciences)and the significance level of 5% was adopted. Results: There was no statistically significant difference between limbs (p = 0.28), nor groups and limbs interaction (P = 0.97). The difference found for the variable was between the groups (p <0.01). The difference between the groups was between the Non-Athletes Group with the other groups (p <0.01) and there was no difference between the groups of athletes with GIRD and Group Athletes Without GIRD (P = 0.97). Conclusion: although handball athletes showed no difference in the rotador strength ratio RL / RM between the groups with and without GIRD, they showed a difference in relation to non-athletes. Thus, the repetitive pitch movement predisposes to a reduction in the isometric rotador strength ratio (RM/RL).