A research group led by Professor Masao Nakayama of the University of Tsukuba scientifically analyzed kicking movements in soccer and showed that it is possible to comprehensively grasp various kicks that were previously treated as separate techniques.It is expected that it will be easier to learn various kicking techniques.

 Instep kicks (straight kicks), curve kicks, non-spin kicks (knuckle kicks), etc. in soccer are important techniques that are frequently used in free kicks, etc., and have been explained and taught as independent and different techniques.However, it was difficult to grasp the key factors (knacks) of each kicking technique because many of them were based on stories of athletes' experiences and case studies.

 This time, by linking an optical 3D motion capture system and virtual modeling technology, we integrated the instep kicks, curve kicks, and non-rotational kicks of 15 experimental collaborators (male university soccer players) into a biomechanical, Analyzed from a coaching perspective.

 As a result, the lateral rotation of the ball tends to increase as the angle of attack (including the declination) formed by the direction of the impact surface of the foot on the horizontal plane and the swing direction of the kick increases. (diagonal impact) and non-spin kick (flat impact) are continuously kicked separately.

 A curve kick that spins the ball and a non-spin kick that suppresses the spin were considered to be completely different kicking techniques, but this time, it was shown that the key factor of the non-spin kick can be captured as an extension of the curve kick.If these findings can be used for sports coaching and learning guidance, it will be possible to acquire and develop new kicking techniques and coaching methods.

Paper information:[Part P: Journal of Sports Engineering and Technology] Features of ball impact in straight, curve and knuckle kicks in soccer

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