Effect of Energy Intake on Performance in Soccer Players during Game-style Exercise

抄録

It is well known that energy intake can delay fatigue and maintain performance in soccer players. Many studies showed the effect of energy intake on performance using soccer-match simulation protocols. However, the simulation protocols include no physical contacts among players which cause certainly fatigue in players. Therefore, we consider that the effect of energy intake on performance is overestimated. In this study, we evaluated the practical effect of energy intake on performance in soccer players using a designed game-style exercise. Sixteen male collegiate soccer players (age: 20.7 ± 0.7 years; height: 171.5 ± 5.4 cm; body mass: 66.8 ± 7.0 kg; percent body fat: 11.4 ± 2.5%) performed soccer game. Test foods, the mixture of carbohydrate and amino acids (180 kcal), or control foods (19 kcal) were ingested before 1^st and 2^nd half of soccer game. Subsequently, Yo-Yo intermittent recovery test (Level 2) was conducted as performance test. As a result, the subjects ingested test foods showed significantly higher scores in the Yo-Yo test compared to those ingested control foods (870 ± 55 m vs. 760 ± 59 m, respectively, p < 0.05). The result demonstrates the practical effect of energy intake on the performance in soccer game.