Effect of Soccer Specific Functional Fatigue On hip and knee Joints Kinematics In professional players during Landing

The purpose of this study was to investigate the effect of soccer specific functional fatigue on hip and knee joints angles during landing in professional players.15 soccer players with at least 2 years experience in Kerman soccer clubs were selected randomly. To evaluate the lower extremity kinematics following jumping and soccer specific- heading, three cameras (with50Hz) were used. To cause fatigue in subjects, specific functional protocol similar to specific bangsbo soccer was used and Quantic sport v21 soft ware was administrated for kinematic analysis of the recorded films. To statistical analyzing of data, descriptive statistical methods, and paired-t test were administrated at α=0.05.Finding revealed that hip and knee angles in sagittal and frontal plane in landing is influenced by functional fatigue. This results has been reducing knee and hip flexion angles and increased varus in knee joint. Results demonstrated a more erect landing posture due to a decrease in hip and knee flexion angles in the post fatigue condition. However, functional fatigue significantly decrease lower extremity control ability in male soccer player during landing.