Caffeine increases endurance and attenuates force sensation during submaximal isometric contractions
Plaskett CJ, Cafarelli E
Journal of applied physiology (Bethesda, Md. : 1985) · 78 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
- 2001-10-01 · J Appl Physiol (1985) · vol. 91 · número 4 · págs. 1535–1544
- Editorial
- American Physiological Society
- Citado
- 131 citas · más que el 80% de estudios similares · 1.2× el promedio de su campo
- Referencias
- 53 trabajos
- Acceso
- De pago
- Áreas de investigación
- Coffee research and impacts · Sports Performance and Training · Muscle activation and electromyography studies
- Palabras clave
- caffeine, ergogenic aids, endurance capacity, isometric contraction, force sensation, quadriceps, motor unit activation, M-wave amplitude, muscle fatigue, neuromuscular transmission, sensory feedback
- MeSH
- muscle, skeletal, humans, caffeine, central nervous system stimulants, electromyography, electric stimulation, electrophysiology, muscle fatigue, physical endurance, isometric contraction, adult, male, hemodynamics
2 autores
- Carrie Plaskett🇨🇦York University
- ENZO CAFARELLI🇨🇦York University
Resumen
El texto original del estudio, en el idioma en que se publicó.
Caffeine has known ergogenic effects, some of which have been observed during submaximal isometric contractions. We used 15 subjects in a randomized, double-blind, repeated-measures experiment to determine caffeine's ergogenic effects on neuromuscular variables that would contribute to increased endurance capacity. Subjects performed repeated submaximal (50% maximal voluntary contraction) isometric contractions of the right quadriceps to the limit of endurance (T(lim)) 1 h after oral caffeine administration (6 mg/kg). Time to reach T(lim) increased by 17 +/- 5.25% (P < 0.02) after caffeine administration compared with the placebo trial. The changes in contractile properties, motor unit activation, and M-wave amplitude that occurred as the quadriceps reached T(lim) could not account for the prolonged performance after caffeine ingestion. In a separate experiment with the same subjects, we used a constant-sensation technique to determine whether caffeine influenced force sensation during 100 s of an isometric contraction of the quadriceps. The results of this experiment showed that caffeine reduced force sensation during the first 10-20 s of the contraction. The rapidity of this effect suggests that caffeine exerts its effects neurally. Based on these data, the caffeine-induced increase in T(lim) may have been caused by a willingness to maintain near-maximal activation longer because of alterations in muscle sensory processes.
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.