Full text
| |
| Author(s): |
Nathan Gobbi de Oliveira
Total Authors: 1
|
| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Faculdade de Medicina (FM/SBD) |
| Defense date: | 2023-01-27 |
| Examining board members: |
Bryan Saunders;
Erick Prado de Oliveira;
Caio Eduardo Gonçalves Reis;
Hamilton Augusto Roschel da Silva
|
| Advisor: | Bryan Saunders |
| Abstract | |
There is currently a consensus in the literature that carbohydrate (CHO) supplementation during exercise can improve performance, nonetheless, methodological factors such as the amount, concentration and type of CHO ingested can affect this response. Carbohydrate supplementation with different glycemic indices during endurance exercise is poorly studied. It has been suggested that low GI CHOs, such as trehalose, will lead to greater performance benefits than high GI CHO such as maltodextrin. Therefore, this study aimed to investigate the possible ergogenic effects of trehalose supplementation during endurance exercise in trained cyclists. Thirteen recreationally trained male cyclists (VO2max 56.9 ± 10.0 ml·kg-1·min-1, age 37 ± 6 y, height 1.78 ± 0.04 m, cycling experience 8 ± 6 y) were recruited to this double-blind, cross-over, counterbalanced, placebo-controlled study. Seven visits to the laboratory were required, one for the determination of VO2max test and a familiarization to the test protocol on a cycle ergometer (100 min of continuous exercise followed by a 20 min time-trial), another familiarization, and four main visits with blood collections every 20 min and muscle biopsies before and immediately after exercise under the following supplementation conditions: (a) placebo, (b) maltodextrin (10% CHO), (c) isomaltulose (5% CHO) and (d) trehalose (5% CHO). Results: Trehalose improved total work done (302.3 ± 39.6 vs. 287.1 ± 48.8 kJ; p=0.02) and mean power output (251.9 ± 33.0 vs. 241.0 ± 39.6 W; p=0.03) in the 20-min time trial compared to control session, with no other performance differences between the sessions (all p 0.13). Conclusion: Trehalose supplementation throughout endurance exercise improved cycling performance and appears to be an appropriate carbohydrate source for exercise tasks of up to 2 h (AU) | |
| FAPESP's process: | 19/07497-4 - Effects of different types of carbohydrates during exercise on performance and metabolic responses |
| Grantee: | Nathan Gobbi de Oliveira |
| Support Opportunities: | Scholarships in Brazil - Master |