Caffeine alters anaerobic distribution and pacing during a 4000-m cycling time trial
Santos Rde A, Kiss MA, Silva-Cavalcante MD, Correia-Oliveira CR, Bertuzzi R, Bishop DJ, Lima-Silva AE
PloS one · 43 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
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
- Gobierno
- Governo Brasil
- Gobierno
- Ministerio de Economía y Competitividad
Según 3 financiadores declarados y la declaración de financiación del texto completo.
Publicación
- Publicado
- 2013-09-18 · PLoS One · vol. 8 · número 9 · pág. e75399
- Editorial
- Public Library of Science
- Citado
- 62 citas · más que el 94% de estudios similares · 4.1× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 52 trabajos
- Acceso
- Acceso abierto (revista) · CC-BY
- Áreas de investigación
- Coffee research and impacts · Sports Performance and Training · Muscle metabolism and nutrition
- Palabras clave
- caffeine, cycling time trial, pacing strategy, energy expenditure, output power, endurance performance, blood lactate, electromyography, blood flow distribution, recreational cyclists, heart rate, rating of perceived exertion, blood pressure, heart rate variability
- MeSH
- humans, caffeine, central nervous system stimulants, electromyography, exercise, cross-over studies, anaerobic threshold, heart rate, time factors, adult, male
7 autores
- Ralmony de Alcantara Santos🇧🇷Universidade Federal de Pernambuco; Universidade Federal de São Paulo
- Maria Augusta Peduti Dal ́Molin Kiss🇧🇷Universidade de São Paulo
- Marcos David Silva‐Cavalcante🇧🇷Universidade de São Paulo; Universidade Federal de Pernambuco
- Carlos Rafaell Correia‐Oliveira🇧🇷Universidade de São Paulo; Universidade Federal de Pernambuco
- Rômulo Bertuzzi🇧🇷Universidade de São Paulo
- David John Bishop🇦🇺Victoria University
- Adriano Eduardo Lima‐Silva🇧🇷Universidade Federal de Pernambuco
Resumen
El texto original del estudio, en el idioma en que se publicó.
The purpose of the present study was to investigate the effects of caffeine ingestion on pacing strategy and energy expenditure during a 4000-m cycling time-trial (TT). Eight recreationally-trained male cyclists volunteered and performed a maximal incremental test and a familiarization test on their first and second visits, respectively. On the third and fourth visits, the participants performed a 4000-m cycling TT after ingesting capsules containing either caffeine (5 mg.kg(-1) of body weight, CAF) or cellulose (PLA). The tests were applied in a double-blind, randomized, repeated-measures, cross-over design. When compared to PLA, CAF ingestion increased mean power output [219.1±18.6 vs. 232.8±21.4 W; effect size (ES) = 0.60 (95% CI = 0.05 to 1.16), p = 0.034] and reduced the total time [419±13 vs. 409±12 s; ES = -0.71 (95% CI = -0.09 to -1.13), p = 0.026]. Furthermore, anaerobic contribution during the 2200-, 2400-, and 2600-m intervals was significantly greater in CAF than in PLA (p0.05). Similarly, there were no significant differences between CAF and PLA for anaerobic work (26363±7361 vs. 23888±6795 J), aerobic work (68709±2118 vs. 67739±3912 J), or total work (95245±8593 vs. 91789±7709 J), respectively. There was no difference for integrated electromyography, blood lactate concentration, heart rate, and ratings of perceived exertion between the conditions. These results suggest that caffeine increases the anaerobic contribution in the middle of the time trial, resulting in enhanced overall performance.
Resumen vía Europe PMC. Los derechos de autor siguen siendo de los autores o la editorial (CC BY).
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