Sideline throw-in optimization in soccer: a biomechanical perspective

Abstract

An optimization of strength training or better technique training can improve throw in movement. The aim of our study was to describe range of movements executed in this soccer technique. We made a 2D kinematics video analysis. 9 soccer players were analyzed. They performed throw in movements with and without previous run. Throw in without previous run was characterized by a trunk flexion (42.60±9.49º), shoulder extension (16.51±18.34º) and elbow extension (80.17±9.38º). Height of release was 2.32±0.09 m, V 0 reached 14.16±1.55 m/s and angle of release was 27.77±7.53º. The range of this throw in was 22.40±4.80 m. Optimal angle of release was reached at 42.20±0.51º. Height of release reached 2.32±0.09 m in Throw in with previous run case. V 0 reached 14.16±1.55 m/s and angle of release was 27.77±7.53º. Throw in with previous run was characterized by a trunk flexion (35.75±12.93º), shoulder extension (24.80±15.38º) and elbow extension (74.97±9.51º). The range of this throw in was 25.90±5.19 m. Optimal angle of release was reached at 42.61±0.41º. a 0 (p<0.05) and Phase 2 duration (p<0.05) showed significant differences. Movements analyzed were to similar both cases. An adequate training of these described movements can improve the performance of the throw in soccer movement.