Effect of pre-exercise carbohydrate availability on fat oxidation and energy expenditure after a high-intensity exercise
| Autor: | G.A. Ferreira, L.C. Felippe, R.L.S. Silva, R. Bertuzzi, F.R. De Oliveira, F.O. Pires, A.E. Lima-Silva |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Brazilian Journal of Medical and Biological Research, Vol 51, Iss 5 (2018) |
| Druh dokumentu: | article |
| ISSN: | 1414-431X 1414-431x |
| DOI: | 10.1590/1414-431x20186964 |
| Popis: | The aim of this study was to test the hypothesis that reduced pre-exercise carbohydrate (CHO) availability potentiates fat oxidation after an exhaustive high-intensity exercise bout. Eight physically active men underwent a high-intensity exercise (∼95% V̇O2max) until exhaustion under low or high pre-exercise CHO availability. The protocol to manipulate pre-exercise CHO availability consisted of a 90-min cycling bout at ∼70% V̇O2max + 6 × 1-min at 125% V̇O2max with 1-min rest, followed by 48 h under a low- (10% CHO, low-CHO availability) or high-CHO diet (80% CHO, high-CHO availability). Time to exhaustion was shorter and energy expenditure (EE) lower during the high-intensity exercise in low- compared to high-CHO availability (8.6±0.8 and 11.4±1.6 min, and 499±209 and 677±343 kJ, respectively, P0.05), but post-exercise fat oxidation was significantly higher (P0.05). These results suggest that a single bout of high-intensity exercise performed under low-CHO availability increased post-exercise fat oxidation, and even with shorter exercise duration, both post-exercise EE and total EE were not impaired. |
| Databáze: | Directory of Open Access Journals |
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