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| Natura: | Artículo científico |
| Lingua: | en |
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Junta de Andalucía
2010
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| Accesso online: | https://www.redalyc.org/articulo.oa?id=323327664002 |
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Sommario:
- Pre-exercise high concentration carbohydrate supplementation impairs the performance on high intensity cycling exercise M. V. de Sousa L. R. Altimari A. H. Okano C. F. Coelho J. M. Altimari O. Teixeira H. G. Simões R. C. Burini E. S. Cyrino Medicina Cyclists Performance Hormonal responses High intensity exercise Carbohydrate supplementation Objectives. To evaluate the effects of pre-exercise high concentration carbohydrate supplementation on performance, cardiovascular, metabolic and hormonal responses during high intensity cycling exercise. Method. Seven male cyclists (28.7 ± 5.4 years; 65.2 ± 4.7 kg body weight), who performed two continuous exercise trials under placebo (PLA) or carbohydrate (CHO) ingestion at a work rate of 80% VO2max until exhaustion, participated in the study. The cyclists received 5 ml.kg-1 of a maltodextrin solution diluted at a concentration of 10% (CHO) or placebo (PLA) at 60, 45 and 30 min pre-exercise. Results. A 5.4% reduction in the time to exhaustion was observed in the CHO trial compared to the PLA trial. In both trials, glucose and lactate levels were higher in the post-trial condition compared to pre-exercise values (p < 0.05). Free fatty acid levels were lower in the CHO group than in the PLA group both before and after the trial (p < 0.05). Insulinemia was higher during the pre-trial in the CHO group (42.7 ± 3.6 μU.ml-1) compared to the PLA condition (11.8 ± 3.3 μU.ml-1) (p < 0.05), and even decreased to 23.8 ± 5.1 μU.ml-1 during exercise after CHO intake (p < 0.05). No significant differences in plasma cortisol were observed between the two trials (p > 0.05). Conclusions. Pre-exercise high concentration CHO supplementation resulted in impaired performance in high intensity cycling exercise and decreased free fatty acid levels. 2010 artículo científico 1888-7546 https://www.redalyc.org/articulo.oa?id=323327664002 en http://www.redalyc.org/revista.oa?id=3233 Revista Andaluza de Medicina del Deporte application/pdf Junta de Andalucía Revista Andaluza de Medicina del Deporte (España) Num.4 Vol.3