Creatine serum is not as effective as creatine powder for improving cycle sprint performance in competitive male team-sport athletes
Gill ND, Hall RD, Blazevich AJ
Journal of strength and conditioning research · 5 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
- 2004-01-01 · J Strength Cond Res · vol. 18 · número 2 · pág. 272
- Editorial
- Lippincott Williams & Wilkins
- Citado
- 12 citas · más que el 49% de estudios similares · 0.1× el promedio de su campo
- Referencias
- 0 trabajos
- Acceso
- De pago
- Áreas de investigación
- Muscle metabolism and nutrition · Sports Performance and Training · Biochemical effects in animals
- Palabras clave
- creatine monohydrate, creatine supplementation, ergogenic aids, repeated sprint performance, peak power, team sport athletes, male athletes
- MeSH
- humans, creatine, dosage forms, powders, analysis of variance, linear models, cross-over studies, double-blind method, bicycling, dietary supplements, adult, male
3 autores
- Nicholas D. Gill🇳🇿Waikato Institute of Technology
- Rowan D. Hall🇳🇿Waikato Institute of Technology
- Anthony J. Blazevich🇬🇧Brunel University of London
Resumen
El texto original del estudio, en el idioma en que se publicó.
This study examined the effects of supplementation with either creatine monohydrate powder in solution (CP) or a widely available creatine serum (CS) on performance in a repeated maximal sprint cycling test (10 x 6 seconds, 24-second passive rest between sprints). Using a randomized, double-blind, crossover design, 11 competitive male athletes supplemented with creatine in 2 forms according to the manufacturer's recommendations on 2 separate occasions. The 2 supplementation protocols were (a) 20 g.day(-1) x 6 days of creatine powder in solution plus a placebo serum (CP) or (b) 5 ml.day(-1) x 6 days of creatine serum plus a placebo powder (CS). Subjects completed 2 familiarization trials before the 6-day supplementation period. A repeated maximal sprint cycling test was performed prior to and immediately postsupplementation. A 7-week washout period separated the 2 supplementation protocols. Subjects' total work (9.6%) and peak power (3.4%) in the cycle sprint improved significantly (p < 0.05) after loading with CP, but there was little change after loading with CS. The present data support previous research findings showing an ergogenic effect of CP supplementation but indicate that supplementation with CS does not affect sprint cycling performance. Although the levels of creatine in each formulation were not determined, a substantial conversion of creatine into creatinine has been reported in many formulations and may explain the present findings.
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