This research is composed of one preliminary test and three primary tests targeting 8 high school cycle players, and aims at investigating an influence of carbohydrate mouth rinse on aerobic exercise performance ability of Heart Rate (HR), Distance and Rating of Perceived exertion(RPE) and presenting an effective solution to it. For this research, 8 high school cycle players are selected. Then the preliminary test and the three primary tests of Normal race (NO) group, Maltodextrin mouth rinse race(MA) group, and Saccharin mouth rinse race (SA) group are fulfilled. The preliminary test takes fulfills the check of the basic body composition component of stature, weight, body fat, etc., and checks the maximum oxygen consumption using gas analyzer. The primary test arranges 70% strength of Wmax value measured by the preliminary test, and carries out one-hour time trial staying over 80rpm. When it can't stay over 80 rpm, the race is supposed to be quit. The primary test is proceeded in the respectively different ways. NO group proceeds a general race of routeway strength without doing anything. MA group proceeds a race of the same strength after mouth rinse of 7% maltodextrin liquid 25 ml of 70 g/1L for 15 seconds before exercise, and SA group proceeds a race of the same strength after mouth rinse of 0.1% saccharin liquid 25ml of 1g/1L for 15 seconds before exercise. Every 15 minutes during exercise, using RPE scale, the test checks on aerobic exercise performance ability and individual exercise intensity which each student feels. To put the research finding together, the primary test of carbohydrate mouth rinse shows the increase in aerobic exercise performance ability of HR, Distance and the affirmative results in RPE of individual subjective feels of exercise intensity. This shows that carbohydrate mouth rinse before exercise may induce an affirmative physiological change from the players. This result seems to make sure of an improvement effect in exercise performance and fatigue. However, in consideration of personal difference, it is thought that it would be necessary to continually study on metabolic test at various exercise type and strength through carbohydrate mouth rinse in long-term, on the basis of this research finding.