We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
A CAFEÍNA POTENCIALIZA O DESEMPENHO EM ATIVIDADES DE ENDURANCE?
- Authors
de Souza Junior, Tácito Pessoa; Capitani, Caroline Dario; Filho, Irineu Loturco; Viveiros, Luis; Aoki, Marcelo Saldanha
- Abstract
Caffeine is commonly ingested by athletes because of its potential ergogenic effects. It has been proposed that caffeine improve physical performance by acting independently, or concurrently, via 3 different mechanisms: 1) an increased mobilization of intracellular calcium, 2) an increase in free fatty acid oxidation, and 3) serving as an adenosine receptor antagonist in the central nervous system. Early studies suggested that the ergogenic effect of caffeine was related to an increase in fatty acid oxidation and subsequent sparing of muscle glycogen. However, recent investigations indicate that caffeine maximizes endurance performance largely through its antagonist effect on adenosine receptors in the central nervous system. Acting through this mechanism, caffeine may modulate central fatigue and influence ratings of perceived exertion, perceived pain, and levels of vigor, all of which may lead to performance improvements. The majority of research has utilized a protocol where caffeine is ingested 60 min prior to the performance test to ensure optimal absorption. However, it has also been shown that caffeine can enhance performance when consumed 15-30 min prior to the test. The use of caffeine in anhydrous form, as compared to a cup of caffeinated coffee, seems to be more efficient to improve endurance performance. In addition, a low-to-moderate dose of caffeine between 3 and 6 mg/kg appears to be sufficient for enhancing performance in a sustained endurance effort.
- Subjects
CAFFEINE; ENDURANCE athletes; ERGOGENIC aids; INTRACELLULAR calcium; FATTY acid oxidation disorders
- Publication
Brazilian Journal of Biomotricity, 2012, Vol 6, Issue 3, p144
- ISSN
1981-6324
- Publication type
Article