| Summary: | 碩士 === 國立體育學院 === 教練研究所 === 95 === The purposes of this study were to investigate the kinematics and gait parameters of Indoor Eight People Make Tug-of-War “European Back-Step” and “Japanese Back-Step” attack movements. The subjects were recruited from national top three outstanding high school teams with 560 kg-grade and each team contain nine participants.Two JVC High-Speed Video Camera(30Hz) and one Electric Pulling-force Meter (4000Hz) were used to collect the 3D kinematical data. The 3D data were analyzed by Kwon3D motion analysis system and DASY Lab6.0 software. Independent Sample T Test and Pair-data Sample T Test were used to compare the differences between “European” & “Japanese” back-step attack movements. The level of significance was α= .05 in this study, and the statistics software was SPSS 12.0 version. The conclusions and suggestion of this study were as followed:
1.European Back-Step spent less time in the right foot swing phase and the left foot swing phase compared with Japanese Back-Step.Japanese Back-Step spent less time in the right foot double support phase and the left foot double support phase compared with European Back-Step.So European Back-Step needs a steady gait.
2. In the left-right side displacement order, Japanese Back-Step:right＞left＞left＞right, European Back-Step: right＞left＞right＞right.
3.There was no difference between the two style in vertical heavy change.
4.There was no difference between the two style in the period of the smallest body angle.In the smallest body angle, European Back-Step was signifcantly smaller than Japanese Back-Step..In the smallest body angle period, European Back-Step was signifcantly larger than Japanese Back-Step.
5.There was no difference between the two style in angles of lower limbs.But Japanese Back-Step was earlier than European Back-Step in time of the smallest angle.
As result, it is recommended that athletes should practice the Japanese Back-Step attack movement in the future.
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