Caffeine and performance over consecutive days of simulated competition
Stadheim HK, Spencer M, Olsen R, Jensen J
Medicine and science in sports and exercise · 30 citas
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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 no declarada
Publicación
- Publicado
- 2014-02-06 · Med Sci Sports Exerc · vol. 46 · número 9 · págs. 1787–1796
- Editorial
- Lippincott Williams & Wilkins
- Citado
- 42 citas · más que el 81% de estudios similares · 1.5× el promedio de su campo
- Referencias
- 42 trabajos
- Acceso
- Acceso abierto (copia en repositorio) · OTHER-OA
- Áreas de investigación
- Coffee research and impacts · Sports Performance and Training · Thermoregulation and physiological responses
- Palabras clave
- caffeine, caffeine dose, cross-country skiing, endurance performance, muscle damage, creatine kinase, epinephrine, blood lactate, heart rate, myalgia, placebo
- MeSH
- humans, epinephrine, lactic acid, caffeine, creatine kinase, exercise test, cross-over studies, double-blind method, competitive behavior, placebo effect, oxygen consumption, heart rate, running, time factors, skiing, male, athletic performance, young adult, performance-enhancing substances, myalgia
4 autores
- Hans Kristian Stadheim🇳🇴National Institute of Occupational Health; Norwegian School of Sport Sciences
- Matthew D. Spencer🇳🇴Norwegian School of Sport Sciences
- Raymond Olsen🇳🇴National Institute of Occupational Health
- Jørgen Jensen🇳🇴Norwegian School of Sport Sciences
Resumen
El texto original del estudio, en el idioma en que se publicó.
Purpose
Performance improvements after caffeine (CAF) ingestion are well documented when using a 1-d protocol. In numerous competitions such as the Tour de France, Tour de Ski, world championships, and National College Athletic Association championships, athletes compete for several days in a row. To date, no studies have investigated the effects of CAF when competing for consecutive days in a row. This study aimed to investigate the effects of placebo (PLA) and two different CAF doses (3 and 4.5 mg·kg body mass) on performance in a 10-min all-out, cross-country, double poling ergometer test (C-PT) 2 d in a row.
Method
Eight highly trained male cross-country skiers (V˙O2max-run, 78.5 ± 1.6 mL·kg·min) participated in the study, which was a randomized, double-blind, PLA-controlled, crossover design. Performance was assessed as distance covered during a 10-min all-out C-PT. Oral ingestion of CAF or PLA was consumed 75 min before the all-out C-PT.
Results
Poling distance was improved after CAF ingestions compared with that after PLA on both days. The improvements on day 1 were 4.0% (90% confidence limits, ±3.3) and 4.0% ± 2.9% for both CAF doses, respectively (P < 0.05), whereas improvements on day 2 were 5.0% ± 3.6% and 5.1% ± 2.8% for CAF3 and CAF4.5, respectively, compared with those for PLA. Improved performance was associated with increased HR, adrenaline concentration, blood lactate concentration, and V˙O2 consumption after CAF ingestion. Furthermore, performance was elevated despite higher creatine kinase concentration and muscular pain at arrival on day 2 for both CAF doses.
Conclusions
Both CAF doses improved performance in the 10-min all-out C-PT compared with PLA over two consecutive days. Therefore, CAF seems useful for athletes competing over consecutive days despite higher muscle damage occurring after enhanced performance on the first day.
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