Caffeine effects on VO2max test outcomes investigated by a placebo perceived-as-caffeine design
Brietzke C, Asano RY, De Russi de Lima F, Pinheiro FA, Franco-Alvarenga, Ugrinowitsch C, Pires FO
Nutrition and health · 22 citas
Cómo se estudió
- Diseño
- Ensayo controlado aleatorizado (indexado por PubMed)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
Quién lo pagó
- Financiación
- Financiación independiente
- Gobierno
- Fundação de Amparo à Pesquisa do Estado de São Paulo
- Gobierno
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
- Gobierno
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo
- Subvenciones
- Fundação de Amparo à Pesquisa do Estado de São Paulo (2010/01317-0)
Según 3 financiadores declarados.
Publicación
- Publicado
- 2017-12-01 · Nutr Health · vol. 23 · número 4 · págs. 231–238
- Editorial
- SAGE Publishing
- Citado
- 30 citas · más que el 70% de estudios similares · 0.8× el promedio de su campo
- Referencias
- 49 trabajos
- Acceso
- De pago
- Áreas de investigación
- Muscle metabolism and nutrition · Cardiovascular and exercise physiology · Sports Performance and Training
- Palabras clave
- Caffeine, Placebo, Ingestion, Perceived exertion, Medicine, VO2 max, Internal medicine, Cycling, Endocrinology, Animal science, Cardiology, Physical therapy, Heart rate, Blood pressure, Biology
- MeSH
- leg, humans, fatigue, caffeine, central nervous system stimulants, severity of illness index, reproducibility of results, single-blind method, attitude to health, deception, oxygen consumption, time factors, bicycling, dietary supplements, adult, athletic performance, physical exertion, young adult, performance-enhancing substances, musculoskeletal pain
7 autores
- Cayque Brietzke🇧🇷Universidade de São Paulo
- Ricardo Yukio Asano🇧🇷Universidade de São Paulo
- Felipe De Russi de Lima🇧🇷Universidade de São Paulo
- Fabiano Aparecido Pinheiro🇧🇷Universidade de São Paulo
- Paulo Estevão Franco‐Alvarenga🇧🇷Universidade de São Paulo
- Carlos Ugrinowitsch🇧🇷Universidade de São Paulo
- Flávio Oliveira Pires🇧🇷Universidade de São Paulo
Resumen
El texto original del estudio, en el idioma en que se publicó.
Background
Ergogenic effects of caffeine (CAF) ingestion have been observed in different cycling exercise modes, and have been associated with alterations in ratings of perceived exertion (RPE). However, there has been little investigation of maximal oxygen uptake (VO2MAX) test outcomes.
Aim
This study aimed to verify whether CAF may reduce RPE, thereby improving maximal incremental test (MIT) outcomes such as VO2MAX, time to exhaustion and peak power output (WPEAK).
Methods
Nine healthy individuals performed three MITs (25 W/min until exhaustion) in a random, counterbalanced fashion after ingestion of CAF, placebo perceived as caffeine (PLA), and no supplementation (baseline control). VO2 was measured throughout the test, while RPE was rated according to overall and leg effort sensations. The power output corresponding to submaximal (RPE = 14 according to the 6-20 Borg scale) and maximal RPE was recorded for both overall (O-RPE14 and O-RPEMAX) and leg RPE (L-RPE14 and L-RPEMAX).
Results
VO2MAX did not change significantly between MITs; however, CAF and PLA increased time to exhaustion (↑ ∼18.7% and ∼17.1%, respectively; p PEAK (↑ ∼13.0% and ∼11.8%, respectively; p MAX and L-RPEMAX) than submaximal RPE (possibly beneficial in O-RPE14 and L-RPE14). Similar results were found when participants ingested PLA.
Conclusions
Compared with control, CAF and PLA improved MIT performance outcomes such as time to exhaustion and WPEAK, without altering VO2MAX values. CAF effects were attributed to placebo.
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