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KMID : 1023920150170020083
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Journal of the Korean Academy of Kinesiology
2015 Volume.17 No. 2 p.83 ~ p.92
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he Study of Optimal Bending Stiffness of Volleyball Shoe Sole by Using Energy Return Method in Lower Extremity Joint
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Jeon Min-Ju
Kwak Chang-Soo
Hong Jae-Seung
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Abstract
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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.
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KEYWORD
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volleyball shoe, bending stiffness, power, energy return
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