| Full text | |
| Author(s): |
Miyagi, Willian E.
[1, 2]
;
Bertuzzi, Romulo C.
[3]
;
Nakamura, Fabio Y.
[4]
;
de Poli, Rodrigo A. B.
[1, 2]
;
Zagatto, Alessandro M.
[1, 2]
Total Authors: 5
|
| Affiliation: | [1] Lab Physiol & Sport Performance LAFIDE, Bauru - Brazil
[2] Sao Paulo State Univ UNESP, Sch Sci, Postgrad Program Movement Sci, Bauru - Brazil
[3] Univ Sao Paulo, Sch Phys Educ & Sport, Sao Paulo - Brazil
[4] G dAnnunzio Univ Chieti Pescara, Dept Med & Aging Sci, Pescara - Italy
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | FRONTIERS IN NUTRITION; v. 5, SEP 20 2018. |
| Web of Science Citations: | 1 |
| Abstract | |
The aim of this study was to verify the effects of caffeine on anaerobic capacity estimated by the sum of the estimated glycolytic {[}E-{[}La]] and phosphagen {[}E-PCr] metabolism based on blood lactate and excess post-oxygen consumption responses (AC({[}La-]+EPOCfast)). Fourteenmale cyclists were submitted to a graded exercise test to determine themaximal oxygen uptake ((V)over dotO(2max)) and intensity associated with. (V)over dotO(2max) (i(V)over dotO(2max)). Subsequently, the participants performed two supramaximal efforts at 115% of i(V)over dotO(2max) to determine the AC({[}La-]+EPOCfast), after previous supplementation with caffeine (6 mg.kg(-1)) or a placebo (dextrose), in a cross over, randomized, double blind, and placebo-controlled design. The time to exhaustion was higher in the caffeine (186.6 +/- 29.8 s) than in the placebo condition (173.3 +/- 25.3 s) (p = 0.006) and a signi fi cant correlation was found between them (r = 0.86; P = 0.00008). Significant differences were not found between AC({[}La-] + EPOCfast) values from the placebo (4.06 +/- 0.83 L and 55.2 +/- 5.7 mL.kg(-1)) and caffeine condition (4.00 +/- 0.76 L and 54.6 +/- 5.4 mL.kg(-1)); however, a significant correlation was observed only for AC({[}La-]+EPOCfast) expressed in absolute values (r = 0.74; p < 0.002). The E-{[}La] and E-PCr also presented no significant differences and they were signi fi cantly correlated (r = 0.82 and r = 0.55, respectively; p < 0.05). We conclude based on the overall comparison of mean values between two treatments that acute caffeine ingestion improves the time to exhaustion but does not affect anaerobic capacity estimation. (AU) | |
| FAPESP's process: | 14/02829-5 - Determination of the maximum accumulated oxygen deficit using only one session of supramaximal exercise on a cycle ergometer |
| Grantee: | Willian Eiji Miyagi |
| Support Opportunities: | Scholarships in Brazil - Master |
| FAPESP's process: | 13/12940-8 - Maximal accumulated oxygen deficit determination using a single supramaximal exercise effort: analysis of reproducibility and influence of exercise mode and exercise intensity |
| Grantee: | Alessandro Moura Zagatto |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 16/17836-2 - Effects of neuromuscular post activation induced by jumps in anaerobic capacity in cycle |
| Grantee: | Rodrigo de Araujo Bonetti de Poli |
| Support Opportunities: | Scholarships in Brazil - Master |