Impact of differing protein sources and a creatine containing nutritional formula after 12 weeks of resistance training
Kerksick CM, Rasmussen C, Lancaster S, Starks M, Smith P, Melton C, Greenwood M, Almada A, Kreider R
Nutrition (Burbank, Los Angeles County, Calif.) · 33 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
- 2007-08-03 · Nutrition · vol. 23 · número 9 · págs. 647–656
- Editorial
- Elsevier BV
- Citado
- 61 citas · más que el 79% de estudios similares · 1.5× el promedio de su campo
- Referencias
- 51 trabajos
- Acceso
- De pago
- Áreas de investigación
- Muscle metabolism and nutrition · Sports Performance and Training · Exercise and Physiological Responses
- Palabras clave
- colostrum, whey protein, casein, creatine supplementation, resistance training, body composition, fat-free mass, muscle strength, muscular endurance, protein supplementation
- MeSH
- muscle, skeletal, adipose tissue, colostrum, humans, creatine, dietary proteins, milk proteins, caseins, absorptiometry, photon, analysis of variance, double-blind method, body composition, weight lifting, food, formulated, adolescent, adult, middle aged, female, male, whey proteins
9 autores
- Chad M. Kerksick🇺🇸 · autor de correspondenciaUniversity of Oklahoma
- Chris J. Rasmussen🇺🇸Baylor University
- Stacy L. Lancaster🇺🇸Baylor University
- Michael Starks🇺🇸Baylor University
- P A Smith🇺🇸Baylor University
- Charlie Melton🇺🇸Baylor University
- Mike Greenwood🇺🇸Baylor University
- Anthony L. Almada
- Richard B. Kreider🇺🇸Baylor University
Resumen
El texto original del estudio, en el idioma en que se publicó.
Objective
We evaluated whether colostrum (Col) or an isocaloric and isonitrogenous blend of whey and casein in addition to creatine (Cr) affects body composition, muscular strength and endurance, and anaerobic performance during resistance training.
Methods
Forty-nine resistance-trained subjects participated in a standardized 12-wk total body resistance training program. In a double-blind and randomized manner, subjects supplemented their diet with a protein control (Pro), Pro/Col, Pro/Cr, or Col/Cr. Supplements were isocaloric and isonitrogenous and provided 60 g/d of casein/whey (Pro) or Col as the protein source. At 0, 8, and 12 wk of supplementation, subjects were weighed, had body composition determined using dual-energy X-ray absorptiometry (DXA), performed one-repetition maximum (1RM) and 80% of 1RM tests on the bench press and leg press, and 30-s anaerobic sprint capacity tests. Data (mean +/- SD) were analyzed by repeated measures analysis of variance and reported as raw data in all tables and as changes from baseline for all figures for the Pro, Pro/Col, Pro/Cr, and Col/Cr groups, respectively.
Results
Resistance training increased 1RM strength, muscular endurance, and anaerobic sprint capacity equally in all groups. Significant main and interaction effects (P 0.05) were noted for fat mass, percent fat, or bone content. Post hoc analysis showed that, compared with Pro, subjects ingesting Pro/Col, Pro/Cr, and Col/Cr showed greater gains in body mass and DXA total scanned mass. Subjects ingesting Pro/Cr and Col/Cr had greater increases in FFM during training in comparison with Pro/Col.
Conclusion
In conjunction with 12 wk of resistance training, ingestion of Col or a blend of whey and casein protein with a vitamin/mineral supplement containing Cr resulted in greater improvements in FFM in comparison with Pro and Pro/Col.
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