An Integrated Approach to Explore Interlimb Asymmetries, Neuromuscular Parameters, and Injuries in Semiprofessional Soccer Players

Interlimb asymmetries have been widely studied with controversial results, suggesting that the magnitude of asymmetries is highly task-dependent and could be related to injury risk. This study aimed to establish an optimal method for assessing asymmetries and evaluate interlimb power performance and range of motion asymmetries in injured and non-injured male semiprofessional soccer players. A prospective and descriptive design was applied, and 20 male semiprofessional soccer players participated. The players underwent a battery of screening tests (i.e., countermovement jump [CMJ], half-squat, hip abduction and hip adduction isometric force, knee flexion and extension isokinetic torque, and lower limb range of movement). The healthy players had a greater range of motion in the hip extension and ankle flexion of the dominant leg and hip abduction and knee flexion of the non-dominant leg. However, the injured players exhibited greater asymmetry in hip abduction maximum isometric strength. These findings suggest the importance of establishing a comprehensive method to assess the range of motion interlimb asymmetries related to injury risk in semiprofessional soccer players.