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Asian J Kinesiol > Volume 17(2); 2015 > Article
The Official Journal of the Korean Academy of Kinesiology 2015;17(2):83-92.
DOI: https://doi.org/10.15758/jkak.2015.17.2.83    Published online May 31, 2015.
The Study of Optimal Bending Stiffness of Volleyball Shoe Sole by Using Energy Return Method in Lower Extremity Joint.
Min-Ju Jeon, Chang-Soo Kwak, Jea-Seung Hong
Hallym Polytechnic University
Hallym University
Correspondence:  Jea-Seung Hong,
Email: cskwak@hallym.ac.kr
Received: 24 April 2015   • Accepted: 9 May 2015
Abstract
PURPOSE
The purpose of this study was to determine the optimal bending stiffness of volleyball shoe soles by using energy return method as a new shoe evaluation method.
METHODS
Nine healthy male college students were recruited for this study, who had previously attended a volleyball class. The running motion at the speed of 4.0±0.4m/sec and the volleyball jumping motion were measured and analyzed by using 3D motion analysis system and a force platform.
RESULTS
The maximal flexion power at each joint was increased as the mid-sole hardness decreased. The maximal extension power was increased as the mid-sole hardness increased. The energy absorption of each joint was increased as the mid-sole hardness was decreased. The energy production was increased as the mid-sole hardness increased.
CONCLUSIONS
Our study suggests that the energy return method may be a reliable biomechanical assessment technique to determine the optimal bending stiffness of volleyball shoes. Future studies with various shoes are warranted for determining the optimal bending stiffness.
Keywords: volleyball shoe, bending stiffness, power, energy return


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