Placebo effects of caffeine on short-term resistance exercise to failure
Duncan MJ, Lyons M, Hankey J
International journal of sports physiology and performance · 41 citas
Etiquetas de revisión
Financiación no declaradaDatos neutrales que nuestra revisión registró sobre cómo se hizo este estudio. Describen el método, nunca si nos gusta el resultado.
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
- 2009-06-01 · Int J Sports Physiol Perform · vol. 4 · número 2 · págs. 244–253
- Editorial
- Human Kinetics
- Citado
- 62 citas · más que el 86% de estudios similares · 2.1× el promedio de su campo
- Referencias
- 23 trabajos
- Acceso
- Acceso abierto (copia en repositorio) · OTHER-OA
- Áreas de investigación
- Coffee research and impacts · Pain Management and Placebo Effect · Sports Performance and Training
- Palabras clave
- caffeine, placebo effect, rating of perceived exertion, repetitions to failure, peak heart rate, blood pressure, exercise performance
- MeSH
- humans, caffeine, central nervous system stimulants, exercise, administration, oral, perception, task performance and analysis, placebo effect, blood pressure, heart rate, muscle fatigue, adult, male, physical exertion, resistance training, young adult
3 autores
- Michael Joseph Duncan🇬🇧University of Derby
- Mark Lyons
- Joanne Hankey
Resumen
El texto original del estudio, en el idioma en que se publicó.
Purpose
This study examined the placebo effect of caffeine on number of repetitions (reps), rating of perceived exertion (RPE), blood pressure (BP), and peak heart rate (PHR) during resistance-training exercise with repetitions (reps) performed to volitional failure.
Methods
Following determination of 1-rep maximum in single-leg leg extension, 15 males performed reps to failure at 60% 1-RM in 3 conditions: control, perceived caffeine condition, and perceived placebo condition presented in a randomized order. Participants were informed they would ingest 250 mL of solution that contained either 3 mg.kg(-1) caffeine or 3 mg.kg(-1) placebo 1 h before each exercise trial. A deceptive protocol was employed and subjects consumed a placebo solution in both conditions. During each condition, total reps, RPE for the active muscle and overall body, and PHR were recorded.
Results
Subjects completed 2 more reps when they perceived they had ingested caffeine. RPE was significantly (P=.04) lower in the perceived caffeine and control conditions and RPE for the active muscle was significantly higher across all conditions compared with RPE for the overall body. No substantial differences were evident in PHR across conditions.
Conclusions
Results of this study are similar to studies of actual caffeine ingestion. However, the perception of consuming a substance that purportedly enhances performance is sufficient enough to enable individuals to complete a greater number of reps to failure during short-term resistance exercise.
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