Cortical substrates of the effects of caffeine and time-on-task on perception of effort
de Morree HM, Klein C, Marcora SM
Journal of applied physiology (Bethesda, Md. : 1985) · 83 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
- 2014-10-24 · J Appl Physiol (1985) · vol. 117 · número 12 · págs. 1514–1523
- Editorial
- American Physiological Society
- Citado
- 114 citas · más que el 96% de estudios similares · 5.4× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 60 trabajos
- Acceso
- De pago
- Áreas de investigación
- Coffee research and impacts · Muscle activation and electromyography studies · Motor Control and Adaptation
- Palabras clave
- caffeine, perceived exertion, time on task, corollary discharge, premotor cortex, motor cortex, submaximal exercise, isometric knee extension, electromyography
- MeSH
- cerebral cortex, humans, caffeine, central nervous system stimulants, electroencephalography, electromyography, cross-over studies, double-blind method, perception, task performance and analysis, evoked potentials, motor, muscle fatigue, isometric contraction, time factors, england, female, quadriceps muscle, muscle strength
3 autores
- Helma M. de Morree🇬🇧Bangor University
- Christoph Klein🇩🇪🇬🇧University of Freiburg; Bangor University
- Samuele Marcora🇬🇧 · autor de correspondenciaBangor University; University of Kent
Resumen
El texto original del estudio, en el idioma en que se publicó.
Caffeine intake results in a decrease in perception of effort, but the cortical substrates of this perceptual effect of caffeine are unknown. The aim of this randomized counterbalanced double-blind crossover study was to investigate the effect of caffeine on the motor-related cortical potential (MRCP) and its relationship with rating of perceived effort (RPE). We also investigated whether MRCP is associated with the increase in RPE occurring over time during submaximal exercise. Twelve healthy female volunteers performed 100 intermittent isometric knee extensions at 61 ± 5% of their maximal torque 1.5 h after either caffeine (6 mg/kg) or placebo ingestion, while RPE, vastus lateralis electromyogram (EMG), and MRCP were recorded. RPE and MRCP amplitude at the vertex during the first contraction epoch (0-1 s) were significantly lower after caffeine ingestion compared with placebo (P < 0.05) and were significantly higher during the second half of the submaximal intermittent isometric knee-extension protocol compared with the first half (P < 0.05). No significant effects of caffeine and time-on-task were found for EMG amplitude and submaximal force output variables. The covariation between MRCP and RPE across both caffeine and time-on-task (r10 = -0.335, P < 0.05) provides evidence in favor of the theory that perception of effort arises from neurocognitive processing of corollary discharges from premotor and motor areas of the cortex. Caffeine seems to reduce perception of effort through a reduction in the activity of cortical premotor and motor areas necessary to produce a submaximal force, and time-on-task has the opposite effect.
Resumen vía Europe PMC. Los derechos de autor siguen siendo de los autores o la editorial.
Confianza de la comunidad
Cargando…
¿Cuánto confías en los hallazgos de este estudio?
Comentarios
¿Algo está mal aquí?
Señala este estudio si su información, etiquetas o financiación parecen incorrectas. Un editor revisa cada señalamiento.
Información educativa sobre investigación publicada. No es consejo médico ni una recomendación para empezar o dejar nada.