Effect of short-term creatine supplementation on neuromuscular function
Bazzucchi I, Felici F, Sacchetti M
Medicine and science in sports and exercise · 23 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
- 2009-09-15 · Med Sci Sports Exerc · vol. 41 · número 10 · págs. 1934–1941
- Editorial
- Lippincott Williams & Wilkins
- Citado
- 37 citas · más que el 62% de estudios similares · 0.4× el promedio de su campo
- Referencias
- 35 trabajos
- Acceso
- De pago
- Áreas de investigación
- Muscle metabolism and nutrition · Biochemical effects in animals · Sports Performance and Training
- Palabras clave
- creatine supplementation, neuromuscular function, muscle contractile properties, force-velocity relationship, muscle fiber conduction velocity, twitch torque, muscle fatigue, elbow flexors, voluntary muscle contraction, electromyography
- MeSH
- muscle, skeletal, elbow joint, humans, creatine, electromyography, administration, oral, analysis of variance, double-blind method, electric stimulation, muscle fatigue, isometric contraction, torque, time factors, dietary supplements, adult, male, muscle fibers, skeletal, young adult
3 autores
- Ilenia Bazzucchi🇮🇹Foro Italico University of Rome
- Francesco Felici🇮🇹Foro Italico University of Rome
- Massimo Sacchetti🇮🇹Foro Italico University of Rome
Resumen
El texto original del estudio, en el idioma en que se publicó.
Purpose
The purpose of the present investigation was to determine whether short-term creatine (Cr) supplementation would affect 1) muscle contractile properties assessed by evoked and voluntary contractions, 2) force-velocity relationship, and 3) mean muscle fiber conduction velocity (CV).
Methods
Using a double-blind random design, 16 moderately trained men (25.2 ± 5.1 yr) were assigned to a Cr (CRE) or a placebo (PLA) group. Subjects supplemented their diet four times a day for 5 d with 5 g of Cr + 15 g maltodextrin (CRE) or 20 g maltodextrin (PLA). Isometric maximal voluntary contraction, maximal twitch, force-velocity relationship, and dynamic fatiguing contractions were assessed in the elbow flexors. Mechanical and EMG signals were recorded and analyzed. CV was estimated from the EMG and used as a parameter of interest.
Results
After supplementation, peak torque (PT) of maximal twitch was 33.4% higher, and the time to reach the PT was 54.7% lower in CRE than in PLA (P < 0.05). Torque-angular velocity curve was enhanced after Cr supplementation, especially at the higher velocities. Mean fiber CV was, on average, 8.9% higher in CRE at all angular velocities after supplementation (P < 0.05). EMG and mechanical parameters during the fatiguing exercise protocol did not show significant differences in muscle fatigue between the two groups after supplementation.
Conclusions
The present study shows that oral Cr supplementation improves neuromuscular function of the elbow flexor muscle during both voluntary and electrically induced contractions.
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