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Trehalose Improved 20-min Cycling Time-Trial Performance After 100-min Cycling in Amateur Cyclists.
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- Author(s): de Oliveira, Nathan Gobbi (AUTHOR); de Oliveira, Luana Farias (AUTHOR); da Silva, Rafael Pires (AUTHOR); Oliveira, Tamires Nunes (AUTHOR); Möller, Gabriella Berwig (AUTHOR); Murasaki, Juliana (AUTHOR); Ramires, Manoel Antônio (AUTHOR); Azevedo, Rafael de Almeida (AUTHOR); Artioli, Guilherme Giannini (AUTHOR); Roschel, Hamilton (AUTHOR); Gualano, Bruno (AUTHOR); Saunders, Bryan (AUTHOR)
- Source:
International Journal of Sport Nutrition & Exercise Metabolism. Jul2024, Vol. 34 Issue 4, p199-206. 8p. - Source:
- Additional Information
- Subject Terms: EXERCISE; RESEARCH funding; GLYCEMIC control; STATISTICAL sampling; RANDOMIZED controlled trials; DESCRIPTIVE statistics; CYCLING; BLOOD sugar; EXPERIMENTAL design; HEART beat; AMATEUR athletes; LACTATES; DIETARY carbohydrates; ATHLETIC ability; ENDURANCE sports training; GLYCEMIC index; DIETARY supplements; TIME; ERGOGENIC aids; BLOOD sugar monitoring
- Abstract: Carbohydrate (CHO) supplementation during endurance exercise can improve performance. However, it is unclear whether low glycemic index (GI) CHO leads to differential ergogenic and metabolic effects compared with a standard high GI CHO. This study investigated the ergogenic and metabolic effects of CHO supplementation with distinct GIs, namely, (a) trehalose (30 g/hr), (b) isomaltulose (30 g/hr), (c) maltodextrin (60 g/hr), and (d) placebo (water). In this double-blind, crossover, counterbalanced, placebo-controlled study, 13 male cyclists cycled a total of 100 min at varied exercise intensity (i.e., 10-min stages at 1.5, 2.0, and 2.5 W/kg; repeated three times plus two 5-min stages at 1.0 W/kg before and after the protocol), followed by a 20-min time trial on four separated occasions. Blood glucose and lactate (every 20 min), heart rate, and ratings of perceived exertion were collected throughout, and muscle biopsies were taken before and immediately after exercise. The results showed that trehalose improved time-trial performance compared with placebo (total work done 302 ± 39 vs. 287 ± 48 kJ; p =.01), with no other differences between sessions (all p ≥.07). Throughout the 100-min protocol, blood glucose was higher with maltodextrin compared with the other supplements at all time points (all p <.05). Heart rate, ratings of perceived exertion, muscle glycogen content, blood glucose, and lactate were not different between conditions when considering the 20-min time trial (all p >.05). Trehalose supplementation throughout endurance exercise improved cycling performance and appears to be an appropriate CHO source for exercise tasks up to 2 hr. No ergogenic superiority between the different types of CHO was established. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of International Journal of Sport Nutrition & Exercise Metabolism is the property of Human Kinetics Publishers, Inc. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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