Effect of different frequencies of creatine supplementation on muscle size and strength in young adults
Candow DG, Chilibeck PD, Burke DG, Mueller KD, Lewis JD
Journal of strength and conditioning research · 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
- 2011-04-21 · J Strength Cond Res · vol. 25 · número 7 · págs. 1831–1838
- Editorial
- Lippincott Williams & Wilkins
- Citado
- 36 citas · más que el 72% de estudios similares · 1.0× el promedio de su campo
- Referencias
- 39 trabajos
- Acceso
- De pago
- Áreas de investigación
- Muscle metabolism and nutrition · Sports Performance and Training · Biochemical effects in animals
- Palabras clave
- creatine supplementation, dosing frequency, resistance training, muscle thickness, muscle strength, young adults, elbow flexors, leg press strength, sex differences, renal function, urinary microalbumin
- MeSH
- leg, arm, thorax, muscle, skeletal, humans, creatine, organ size, analysis of variance, double-blind method, physical education and training, dietary supplements, adult, female, male, muscle strength, young adult
5 autores
- Darren Glenn Candow🇨🇦 · autor de correspondenciaUniversity of Regina; St. Francis Xavier University; University of Saskatchewan
- Philip David Chilibeck🇨🇦University of Regina; St. Francis Xavier University; University of Saskatchewan
- Darren G Burke🇨🇦University of Regina; St. Francis Xavier University; University of Saskatchewan
- Kristie D Mueller🇨🇦University of Regina; St. Francis Xavier University; University of Saskatchewan
- Jessica D Lewis🇨🇦University of Regina; St. Francis Xavier University; University of Saskatchewan
Resumen
El texto original del estudio, en el idioma en que se publicó.
The purpose was to determine if creatine supplementation, consumed immediately before and immediately after exercise, with different dosing frequency (i.e., 2 or 3 d wk) could enhance the gains in muscle size and strength from resistance training (RT) in young adults. A group of 38 physically active, nonresistance trained university students (21-28 years) was randomly allocated to 1 of 4 groups: CR2 (0.15 g·kg creatine during 2 d wk of RT; 3 sets of 10 repetitions; n = 11, 6 men, 5 women), CR3 (0.10 g·kg creatine during 3 d wk of RT; 2 sets of 10 repetitions; n = 11, 6 men, 5 women;), PLA2 (placebo during 2 d wk of RT; n = 8, 5 men, 3 women), and PLA3 (placebo during 3 d wk of RT; n = 8, 4 men, 4 women) for 6 weeks. Before and after training, measurements were taken for muscle thickness of the elbow and knee flexor and extensor muscle groups (ultrasound), 1-repetition maximumleg press and chest press strength, and kidney function (urinary microalbumin). Repeated-measures analysis of variance showed that strength and muscle thickness increased in all groups with training (p < 0.05). The CR2 (0.6 ± 0.9 cm or 20%; p < 0.05) and CR3 groups (0.4 ± 0.6 cm or 16.4%; p < 0.05) experienced greater change in muscle thickness of the elbow flexors compared to the PLA2 (0.05 ± 0.5 cm or 2.3%) and PLA3 groups (0.13 ± 0.7 cm or 6.3%). Men supplementing with creatine experienced a greater increase in leg press strength (77.3 ± 51.2 kg or 62%) compared to women on creatine (21.3 ± 10 kg or 34%, p < 0.05). We conclude that creatine supplementation during RT has a small beneficial effect on regional muscle thickness in young adults but that giving the creatine over 3 d wk did not differ from giving the same dose over 2 d wk.
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