Effect of creatine and beta-alanine supplementation on performance and endocrine responses in strength/power athletes
Hoffman J, Ratamess N, Kang J, Mangine G, Faigenbaum A, Stout J
International journal of sport nutrition and exercise metabolism · 87 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
- 2006-08-01 · Int J Sport Nutr Exerc Metab · vol. 16 · número 4 · págs. 430–446
- Editorial
- Human Kinetics
- Citado
- 151 citas · más que el 88% de estudios similares · 2.6× el promedio de su campo
- Referencias
- 41 trabajos
- Acceso
- De pago
- Áreas de investigación
- Muscle metabolism and nutrition · Biochemical effects in animals · Sports Performance and Training
- Palabras clave
- creatine supplementation, beta-alanine supplementation, resistance training, power performance, college football players, testosterone, cortisol, growth hormone, insulin-like growth factor I, sex hormone-binding globulin, lean body mass, body fat content, bench press, squatting, Wingate test
- MeSH
- humans, creatine, testosterone, hydrocortisone, growth hormone, beta-alanine, insulin-like growth factor i, sex hormone-binding globulin, treatment outcome, double-blind method, body composition, anaerobic threshold, heart rate, physical endurance, drug synergism, football, weight lifting, dietary supplements, adult, male
6 autores
- Jay R. Hoffman🇺🇸The College of New Jersey
- Nicholas A. Ratamess
- Jie Kang
- Gerald T. Mangine
- Avery D. Faigenbaum
- Jeffrey R. Stout
Resumen
El texto original del estudio, en el idioma en que se publicó.
The effects of creatine and creatine plus beta-alanine on strength, power, body composition, and endocrine changes were examined during a 10-wk resistance training program in collegiate football players. Thirty-three male subjects were randomly assigned to either a placebo (P), creatine (C), or creatine plus beta-alanine (CA) group. During each testing session subjects were assessed for strength (maximum bench press and squat), power (Wingate anaerobic power test, 20-jump test), and body composition. Resting blood samples were analyzed for total testosterone, cortisol, growth hormone, IGF-1, and sex hormone binding globulin. Changes in lean body mass and percent body fat were greater (P < 0.05) in CA compared to C or P. Significantly greater strength improvements were seen in CA and C compared to P. Resting testosterone concentrations were elevated in C, however, no other significant endocrine changes were noted. Results of this study demonstrate the efficacy of creatine and creatine plus beta-alanine on strength performance. Creatine plus beta-alanine supplementation appeared to have the greatest effect on lean tissue accruement and body fat composition.
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