| Full text | |
| Author(s): |
Bonetti de Poli, Rodrigo de Araujo
[1, 2]
;
Roncada, Luan Henrique
[1, 3]
;
Malta, Elvis de Souza
[1, 2]
;
Artioli, Guilherme Giannini
[4, 5]
;
Bertuzzi, Romulo
[4]
;
Zagatto, Alessandro Moura
[1, 2, 3]
Total Authors: 6
|
| Affiliation: | [1] Sao Paulo State Univ UNESP, Lab Physiol & Sport Performance LAFIDE, Bauru - Brazil
[2] Sao Paulo State Univ UNESP, Postgrad Program Movement Sci, Bauru - Brazil
[3] Sao Paulo State Univ UNESP, Dept Phys Educ, Sch Sci, Bauru - Brazil
[4] Univ Sao Paulo, Sch Phys Educ & Sport, Sao Paulo - Brazil
[5] Univ Sao Paulo, Appl Physiol & Nutr Res Grp, Sao Paulo - Brazil
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | FRONTIERS IN PHYSIOLOGY; v. 10, APR 10 2019. |
| Web of Science Citations: | 0 |
| Abstract | |
This study aimed to investigate the effects of short-duration creatine monohydrate supplementation on anaerobic capacity (AC), anaerobic energy pathways, and timeto-exhaustion during high-intensity running. Fourteen healthy men underwent a graded exercise test (GXT) followed by a (V)overdotO(2max) confirmation test, 5 submaximal efforts, and 4 supramaximal running bouts at 115% of (V)overdotO(2max) intensity (the first two supramaximal sessions were applied as familiarization trials) to measure the AC using two procedures; the maximum accumulated oxygen deficit (MAOD) and non-oxidative pathways energetics sum (AC({[}La)(-])(+EPOCfast)). The investigation was conducted in a single-blind and placebo-controlled manner, with participants performing the efforts first after being supplemented with a placebo (dextrose 20 g.day(-1) for 5 days), and then, after a 7 day ``placebo{''} washout period, they started the same procedure under creatine supplementation (20 g.day(-1) for 5 days. This order was chosen due to the prolonged washout of creatine. MAOD was not different between placebo (3.35 +/- 0.65 L) and creatine conditions (3.39 +/- 0.79 L; P = 0.58) and presented a negligible effect {[}effect size (ES) = 0.08], similar to, AC({[}La)(-])(+EPOCfast) (placebo condition (3.66 +/- 0.79 Land under creatine ingestion 3.82 +/- 0.85 L; P = 0.07) presenting a small effect (ES = 0.20). The energetics from the phosphagen pathway increased significantly after creatine supplementation (1.66 +/- 0.40 L) compared to the placebo condition (1.55 +/- 0.42 L; P = 0.03). However, the glycolytic and oxidative pathways were not different between conditions. Furthermore, time to exhaustion did not differ between placebo (160.79 +/- 37.76 s) and creatine conditions (163.64 +/- 38.72; P = 0.49). Therefore, we can conclude that creatine supplementation improves the phosphagen energy contribution, but with no statistical effect on AC or time to exhaustion in supramaximal running. (AU) | |
| FAPESP's process: | 17/21724-8 - Impact of cold-water immersion regular use after high-intensity interval training sessions on muscle repair, muscle adaptation and running performance |
| Grantee: | Elvis de Souza Malta |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| 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 |