(Motion influencing) Calculation of head acceleration and HIC of heading in soccer.

Abstract

Heading in soccer is mentioned about its chronic injury risk over the world. HIC (Head Injury Criterion) is used to assess the risk of head impact in many fields. In this study, linear acceleration of head was measured by optical motion capture system (VICON) and Impact Monitor Mouthguard. Furthermore, to compare the measurement the linear head acceleration with two methods, and discuss the motion decrease the head impact were aim of this study. HIC and angular velocity of neck swing and head rotation were calculated. HIC was small enough to judge that the risk of a single impact was small. Results of impact monitor mouthguard was better match with correlation coefficient in ball velocity after the impact than results of motion capture. Neck angular velocity of front swing influences HIC than ball velocity according to their correlation coefficient. Therefore, neck front swing is not reasonable to increase the ball velocity.