Name: LAIS PESSANHA LEAL
Publication date: 06/12/2024
Examining board:
Name |
Role |
|---|---|
| ADRIANO FORTES MAIA | Presidente |
| DANILO SALES BOCALINI | Examinador Interno |
| LUCAS GUIMARÃES FERREIRA | Coorientador |
| LUÍS SÉRGIO FONTELES DUARTE | Examinador Externo |
Summary: Ergogenic supplements are often used to enhance physical performance. Capsiate is a non-pungent analog of capsaicin that has shown effects on muscular parameters, but its efficacy in high-intensity exercises has been little explored. The aim of the present study was to evaluate the effects of acute capsiate supplementation on muscle efficiency, energy system contribution, and performance during repeated sprints in young adults. The methodology consisted of a randomized, double-blind, crossover study involving 8 participants (age: 23 ± 2 years; height: 177 ± 5 cm; weight: 74 ± 8 kg). Participants performed 10 six-second sprints with 30-second intervals between each sprint under two experimental conditions: supplementation with capsiate (12 mg) and placebo (maltodextrin). The analyzed variables included peak power and mean power, average work and total work, fatigue index, blood lactate concentration, heart rate, neuromuscular efficiency, perceived exertion, and measurements of energy system contribution. Capsiate supplementation resulted in a significant increase in peak power (mean increase of 4.2% ± 1.0%; p < 0.05) compared to the placebo. No significant differences were found in mean power (250.4 ± 22.1 W vs. 245.3 ± 23.4 W; p = 0.12) or fatigue index (27.5% ± 5.2% vs. 28.1% ± 5.6%; p = 0.20). Blood lactate concentrations pre-sprint (4.2 ± 0.8 mmol/L vs. 4.0 ± 0.9 mmol/L; p = 0.31) and post-sprint (12.3 ± 2.1 mmol/L vs. 11.8 ± 2.2 mmol/L; p = 0.28) were similar between the two conditions. Neuromuscular efficiency and perceived exertion also did not differ significantly. The analysis of energy system contribution showed no significant changes in glycolytic or oxidative contribution during the sprints under either capsiate or placebo conditions, nor any sprint x supplementation interaction. Acute capsiate supplementation led to improvements in peak power during short-duration sprints in healthy young adults but did not significantly influence neuromuscular efficiency, fatigue, or the contribution of energy systems. These results suggest an ergogenic potential for capsiate in high-intensity, short-duration activities, although further studies are needed to explore its effects on other performance parameters and in larger samples.
Keywords: Capsiate; ergogenic supplementation; physical performance; repeated sprints; muscle efficiency.
