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The effect of carbohydrate diets on amateur runners
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Carbohydrate (CHO) consumption contributes to minimizing muscular and hepatic
glycogen stores during long-distance running. Coinciding with fatigue onset and
performance decline, a decrease in the amount of carbohydrates affects performance in
runners adversely. Accordingly, the effect of three CHO diets (30%, 60%, and 80%)
were each analyzed for seven days on amateur runners’ 5 km performance. Ten amateur
male runners (36.4 ± 12.7 years, 175 ± 4.5 cm, 70.2 ± 6.31 kg) performed a pretest and
three running tests. Body mass was assessed before and after exercise. Pacing and time
were measured for each kilometer in all the research phases. Two-way Anova repeated
measures were employed to analyze the data. In the pretest, the CHO intake results
revealed 4.20 ± 1.86 g/kg. In the 30% diet, CHO consumption was 30.80 ± 1.07% or
2.20 ± 0.42 g/kg; in the 60% diet, 59.34 ± 0.82% or 4.24 ± 0.82 g/kg; and in the 80%
diet, 77.79 ± 1.00 % or 5.56 ± 4.15 g/kg. All analyses showed no significant difference
among the CHO diets. However, in the 80% protocol, time improved by 2.30% in
comparison to the 30% diet and the pretest. Our results revealed that changing dietary
CHO in comparison to a runner’s usual intake did not improve their athletic
performance.
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ROSA, E. S.; GOSTON, J. L.; ABREU, W. C.; SILVA, S. F. da. The effect of carbohydrate diets on amateur runners' performance. Journal of Sports Research, Ankara, v. 9, n. 2, p. 57-66, 2022. Disponível em: https://doi.org/10.18488/90.v9i2.2993. Acesso em: 29 out. 2024.
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