Effects of a drink containing creatine, amino acids, and protein combined with ten weeks of resistance training on body composition, strength, and anaerobic performance
Beck TW, Housh TJ, Johnson GO, Coburn JW, Malek MH, Cramer JT
Journal of strength and conditioning research · 24 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
- 2007-01-01 · J Strength Cond Res · vol. 21 · número 1 · pág. 100
- Editorial
- Lippincott Williams & Wilkins
- Citado
- 39 citas · más que el 74% de estudios similares · 1.1× 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 supplementation, amino acids, protein drinks, resistance training, body composition, muscle strength, muscular endurance, anaerobic performance, fat-free mass, fat mass, peak power, leg extension, bench press
- MeSH
- humans, creatine, carbohydrates, amino acids, proteins, analysis of variance, body composition, anaerobic threshold, physical education and training, beverages, dietary supplements, adult, male, muscle strength
6 autores
- Travis W. Beck🇺🇸University of Nebraska–Lincoln
- Terry J. Housh🇺🇸University of Nebraska–Lincoln
- Glen O. Johnson🇺🇸University of Nebraska–Lincoln
- Jared W. Coburn🇺🇸University of Nebraska–Lincoln
- Moh H. Malek🇺🇸University of Nebraska–Lincoln
- Joel T. Cramer🇺🇸University of Oklahoma
Resumen
El texto original del estudio, en el idioma en que se publicó.
The purpose of this study was to examine the effects of a drink containing creatine, amino acids, and protein vs. a carbohydrate placebo on body composition, strength, muscular endurance, and anaerobic performance before and after 10 weeks of resistance training. Fifty-one men (mean +/- SD; age: 21.8 +/- 2.9 years) were randomly assigned to either the test drink (TEST; n = 23) or the placebo (PLAC; n = 28) and performed two 30-second Wingate Anaerobic Tests for determination of peak power (PP) and mean power (MP), were weighed underwater for percent body fat (%fat) and fat-free mass (FFM), and were tested for 1 repetition maximum (1RM) dynamic constant external resistance strength and muscular endurance (END; number of repetitions performed with 80% of 1RM) on the bilateral leg extension (LE) and free-weight bench press (BP) exercises. The testing was conducted before (PRE) and after (POST) 10 weeks of resistance training (3 sets of 10 repetitions with 80% of the subject's 1RM performed 3 times per week) on the LE and BP exercises. Body weight, FFM, LE 1RM, LE END, BP 1RM, and BP END increased (p < 0.05), whereas %fat decreased (p < 0.05) from PRE to POST for both the TEST and PLAC groups. Peak power and MP, however, increased for the TEST group, but not for the PLAC group. These results suggested that the creatine-, amino acid-, and protein-containing drink provided no additional benefits when compared with carbohydrates alone for eliciting changes in body composition, strength, and muscular endurance after a 10-week resistance training period. The TEST drink was, however, more effective than carbohydrates alone for improving anaerobic power production.
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