| Full text | |
| Author(s): |
Pinheiro Brisola, Gabriel Motta
[1, 2]
;
Miyagi, Willian Eiji
[1, 2]
;
da Silva, Henrique Santos
[1]
;
Zagatto, Alessandro Moura
[2, 3]
Total Authors: 4
|
| Affiliation: | [1] Univ Estadual Paulista, UNESP, Postgrad Program Motricity Sci, Rio Claro, SP - Brazil
[2] Univ Estadual Paulista, UNESP, Lab Physiol & Sport Performance LAFIDE, Bauru, SP - Brazil
[3] Univ Estadual Paulista, UNESP, Dept Phys Educ, Bauru, SP - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | APPLIED PHYSIOLOGY NUTRITION AND METABOLISM; v. 40, n. 9, p. 931-937, SEP 2015. |
| Web of Science Citations: | 16 |
| Abstract | |
The aim of the study was to investigate the effects of acute supplementation of sodium bicarbonate (NaHCO3) on maximal accumulated oxygen deficit (MAOD) determined by a single supramaximal effort (MAOD(ALT)) in running and the correlation with 200- and 400-m running performances. Fifteen healthy men (age, 23 +/- 4 years; maximal oxygen uptake, 50.6 +/- 6.1 mL.kg(-1).min(-1)) underwent a maximal incremental exercise test and 2 supramaximal efforts at 110% of the intensity associated with maximal oxygen uptake, which was carried out after ingesting either 0.3 g.kg(-1) body weight NaHCO3 or a placebo (dextrose) and completing 200- and 400-m performance tests. The study design was double-blind, crossover, and placebo-controlled. Significant differences were found between the NaHCO3 and placebo conditions for MAOD(ALT) (p = 0.01) and the qualitative inference for substantial changes showed a very likely positive effect (98%). The lactic anaerobic contribution in the NaHCO3 ingestion condition was significantly higher (p < 0.01) and showed a very likely positive effect (99% chance), similar to that verified for peak blood lactate concentration (p < 0.01). No difference was found for time until exhaustion (p = 0.19) or alactic anaerobic contribution (p = 0.81). No significant correlations were observed between MAOD(ALT) and 200- and 400-m running performance tests. Therefore, we can conclude that both MAOD(ALT) and the anaerobic lactic metabolism are modified after acute NaHCO3 ingestion, but it is not correlated with running performance. (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 |