The objective of this study was to identify the kinetic characteristics of the leg joints during the take-off motion of the kendo men strike and to investigate how these variables are related to take-off time in 20 male members of a university kendo team. The main results were as follows:
1.Subjects with shorter men strike times tended to also have shorter take-off times. In addition, the take-off time comprised 90% of the total men strike time.
2. The time taken by the three joints of the take-off leg to reach peak plantar flexion and extension torque, as a percentage of total take-off time, was 70.2±4.4% (ankle), 68.0±3.6% (knee), and 54.8±6.2% (hip).
Although there was no significant difference between the ankle and knee, the hip showed a tendency to reach the peak value earlier than the other two joints.
3.There was a significant correlation between deviations in the timings of torque exertion by the three leg joints and take-off time, with smaller deviations associated with shorter take-off times.
4.A significant correlation was observed between the take-off time and peak plantar-flexion torque at the ankle. No significant correlations were observed between take-off time and peak extension torque in the knee and hip or between peak positive torque power in the three joints and mechanical work.
The results of this study reveal the mechanical characteristics of the take-off motion unique to kendo and are useful for formulating training methods suitable for this action sequence.
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