differences in thigh muscularity and dynamic torque between junior and senior soccer players the aim of the present study was to examine differences in thigh muscularity and dynamic torque between elite junior 157 02 years and senior 226 24 years soccer players crosssectional areas of the total muscle compartment quadriceps femoris and hamstrings adductors were determined using magnetic resonance imaging knee extension and flexion torque were also measured at 105 and 314 rad s1 neither junior nor senior players showed significant differences in crosssectional area or torque between the dominant and nondominant leg the quadriceps femoris and hamstrings adductors were significantly greater in the senior than junior players at all thighslice sites the percentage of quadriceps femoris to total muscle compartment was significantly higher in the junior than the senior players and the corresponding value of hamstrings adductors was significant in the reverse direction the senior players showed greater torque than the juniors regardless of motion and velocity even in terms of torque relative to the product of the crosssectional area and height the present results indicate that 1 senior players are characterized by the predominant development of hamstrings and adductors and a higher dynamic torque relative to muscle size and 2 elite soccer players did not show asymmetry in terms of the muscularity or dynamic torque of the thigh muscles irrespective of age