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2018 | 6 | 81-86
Article title

The influence of effective distance on the impact of a punch – Preliminary Analysis

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Introduction: Distance between competitors in fighting sports and their target have an influence on kinematics of motion and as an consequence, its effectiveness. Therefore, the aim of this study is to extent the knowledge about influence of effective distance affects velocity of an object after hit. Material and Methods: Analysis were performed based on captured data of a male competitor with black belt in taekwondo (age: 20 yrs., body mass: 65kg, height: 171 cm). During data capturing, he performed sport punch strike 3 times with his left upper limb, and 3 times with the right one. The target was a ping pong ball. Data capturing was performed in HML (Human Motion Lab). Results: Velocities of sport punch strike were in range from 6.20 -8.01 m/s. Significant increase in passed momentum to the object were in -between 1.12 -1.73 % of effective distance. However, when effective distance were in -between 3.70 -3.95%, there were significant decrease (nearly half) in velocity of hit object. Conclusions: Our findings allows to formulate assumptions for further analysis, which states, tha t when maximum velocity of a punch occurs closer to the moment of hitting a target ( ∆ d), the higher it will be in a moment of that hit (r=0.95; p<0.01). Therefore, it allows to assume, that the lower will be a value of ∆ d, the higher will be destructive f orce for target ( ∆ E)
  • Institute Physical Education, Tourism and Physioterapy, Jan Dlugosz University, Czestochowa, Poland
  • Institute Physical Education, Tourism and Physioterapy, Jan Dlugosz University, Czestochowa, Poland
  • Institute Physical Education, Tourism and Physioterapy, Jan Dlugosz University, Czestochowa, Poland
  • Institute Physical Education, Tourism and Physioterapy, Jan Dlugosz University, Czestochowa, Poland
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