抄録
Mouth guards were used by top athletes to study the changes in muscle strength. As a result, it was found that athletes that tended to bite when exerting strength experienced an increase in muscle strength. On the other hand, the muscle strength in athletes that did not bite when exerting strength tended to decrease. The effects varied depending on to the individual and the type of athletic activity, and the results varied, i. e., some athletes experiencing an increase in maximum strength, some an increase in average strength and some an increase in work strength. Thus it was concluded that there were individual differences in terms of the strength results.
