Most movements

of the Shinai, including the attack stroke will be found to consist of interplay between centrifugal and centripetal force and also of relaxation and tension. If great strength is applied the result will be rigidity and the accumulation of force described in principle two cannot flow freely into the blade. If the tension is timed too early the blow will be dead for the same reason and the same will apply if it is too late. A nice technique results in perfect co- ordination of all factors.