ABSTRACT
It has been demonstrated that excellent athletes usually have, not only a higher exercise capacity but also higher ability to maintain equilibrium which is important for assuming the various body postures required in different sports. It is thought that a method of training which enhances the sense of equilibrium will also increase the ability to perform certain of sports.<BR>Many sensory organs and the central nervous system, which integrates these organs, are integrated to the maintenance of equilibrium. To maintain equilibrium, vestibular, visual and bathyesthetic inputs are integrated centrally (in the brainstem, cerebellum, etc.) and necessary commands are other tissues.<BR>A series of studies which we performed demonstrated that the ability to maintain equilibrium was lower in individuals with imbalanced occlusion than in individuals with normal occlusion.<BR>Imbalanced occlusion can be corrected by the appropriate use of rejin sprints. We recently examined the effects of such sprints on the equilibrium of athletes with imbalanced occlusion, using a gravity fluctuation analyzer. In this study, we raised the bite only within the amount of existing free way spce.<BR>From these results, gravity fluctuation in athletes with imbalanced occlusion was greater than that in individuals with normal occlusion.However, when imbalanced occlusion was corrected by the use of rejin sprints, gravity fluctuation tended to decrease.<BR>It these findings from the present study are combined with the knowledge that the exercise capacity of athletes has a positive correlation with their equilibrium maintenance ability. It appears that correction of imbalanced occlusion and the appropriate use of mouth protectors would contri-bute to improving the performance of athletes.