Effect of creatine on swimming velocity, body composition and hydrodynamic variables
Silva AJ, Machado Reis V, Guidetti L, Bessone Alves F, Mota P, Freitas J, Baldari C
The Journal of sports medicine and physical fitness · 16 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
- 2007-03-01 · J Sports Med Phys Fitness · vol. 47 · número 1 · págs. 58–64
- Editorial
- National Institutes of Health
- Citado
- 28 citas · más que el 61% de estudios similares · 0.5× el promedio de su campo
- Referencias
- 16 trabajos
- Acceso
- De pago
- Áreas de investigación
- Muscle metabolism and nutrition · Sports Performance and Training · Biochemical effects in animals
- Palabras clave
- creatine supplementation, creatine monohydrate, swimming performance, swimming speed, hydrodynamic drag, drag force, output power, body composition, fat-free mass, total body water, female swimmers, youth athletes, propulsive efficiency
- MeSH
- humans, creatine, analysis of variance, statistics, nonparametric, double-blind method, body composition, swimming, dietary supplements, adolescent, female
7 autores
- António José Silva🇵🇹University of Trás-os-Montes and Alto Douro
- Víctor Machado Reis
- Laura Guidetti
- Francisco Alves
- P Mota
- J Freitas
- Carlo Baldari
Resumen
El texto original del estudio, en el idioma en que se publicó.
Aim
Creatine supplementation (CS) has been reported to increase body weight and improve performance during high intensity, short duration, exercise tasks. However, none of the published studies has investigated the influence of CS on performance related hydrodynamic variables during swimming. To investigate the effect of oral CS on swimming velocity, body composition and hydrodynamic variables during the period of final preparation of competitive junior female swimmers.
Methods
In a double blind and randomized manner, 16 female swimmers, were supplemented with 20 g day(-1) of creatine monohydrate (CS group), or a maltodextrin placebo (PL group) for 21 days. Just pre- and post-21 days of supplementation, subjects performed 2x25 swimming bouts at maximum velocity with a 3 min recovery between bouts. The variables measured were 25 m swimming velocity (MSV(25)); active drag force (D(f)); hydrodynamic coefficient (C(x)); power output (P(o)). Body measures were also analysed: body weight (kg), fat-mass (% FAT), body water (% H(2)O), and fat free mass (FFM).
Results
Significant differences were observed in hydrodynamic values: the CS group showed a significant reduction (approximately =25%), in D(f), C(x) and P(o) values, when comparing pretest with post-test. No differences were found in variables related to body composition and performance between CS group and PL group, as well as for CS group during the experimental period.
Conclusions
These data suggest that 21 days of CS produced significant effects on gross and/or propelling efficiency during swimming in female athletes. However, CS did not influence performance, body weight and body composition.
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