Effects of creatine on body composition and strength gains after 4 weeks of resistance training in previously nonresistance-trained humans
Kilduff LP, Pitsiladis YP, Tasker L, Attwood J, Hyslop P, Dailly A, Dickson I, Grant S
International journal of sport nutrition and exercise metabolism · 7 citas
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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
- 2003-12-01 · Int J Sport Nutr Exerc Metab · vol. 13 · número 4 · págs. 504–520
- Editorial
- Human Kinetics
- Citado
- 25 citas · más que el 58% de estudios similares · 0.3× 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 supplementation, resistance training, muscle strength, body composition, creatine uptake, isometric force, weight change, creatine loading
- MeSH
- muscle, skeletal, humans, creatine, double-blind method, task performance and analysis, body composition, isometric contraction, dose-response relationship, drug, weight lifting, adult, male
8 autores
- Liam Patrick Kilduff🇬🇧Swansea University; University of Wales
- Yannis Paul Pitsiladis
- Louise Tasker🇬🇧University of Wales
- Jeff Attwood🇬🇧University of Wales
- Paul Hyslop🇬🇧University of Wales
- Andrew Dailly🇬🇧University of Wales
- Ian Dickson🇬🇧University of Wales
- Stan Grant🇬🇧University of Wales
Resumen
El texto original del estudio, en el idioma en que se publicó.
This study examined the effects of Cr supplementation on muscle strength in conjunction with resistance training in nonresistance-trained males utilizing strategies previously reported in the literature to help optimize muscle CR uptake. Nineteen nonresistance-trained males underwent 4 weeks of resistance training (3 days x week(-1)) while assigned to Cr (20 g x d(-1) Cr + 140 g x d(-1) glucose) for 7 days (loading), followed by 5 g x d(-1) Cr + 35 g x d(-1) glucose for 21 days (maintenance; n = 9) or placebo (160 g x d(-1) glucose [loading] followed by 40 g x d(-1) [maintenance; n = 10]). In subjects classified as "responders" to Cr on the basis of body mass changes (n = 7), the magnitude of change in 180 degrees x s(-1) isokinetic (p = .029) and isometric (p = .036) force was greater compared to the placebo group. A positive correlation was found between changes in body mass and 180 degrees x s(-1) isokinetic (loading: r = 0.68, p = .04; maintenance: r = 0.70, p = .037) and isometric (loading: r = 0.82, p < .01) force. Estimated Cr uptake was also positively correlated with changes in isometric force (r = 0.71, p = .033). These results indicate that Cr supplementation can increase muscle strength (allied with 4 weeks of strength training) but only in subjects whose estimated Cr uptake and body mass are significantly increased; the greater the Cr uptake and associated body mass changes, the greater the performance gains.
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