Effects of creatine supplementation on body composition, strength, and sprint performance
Kreider RB, Ferreira M, Wilson M, Grindstaff P, Plisk S, Reinardy J, Cantler E, Almada AL
Medicine and science in sports and exercise · 217 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
- 1998-01-01 · Med Sci Sports Exerc · vol. 30 · número 1 · págs. 73–82
- Editorial
- Lippincott Williams & Wilkins
- Citado
- 430 citas · más que el 98% de estudios similares · 8.2× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 51 trabajos
- Acceso
- De pago
- Áreas de investigación
- Muscle metabolism and nutrition · Sports Performance and Training · Biochemical effects in animals
- Palabras clave
- creatine monohydrate supplementation, body composition, muscle strength, sprint performance, football players, resistance training, hematological parameters, total body water, fat-free mass, bench press, squatting, power clean, taurine, disodium hydrogen phosphate, potassium phosphate, NCAA athletes, dual-energy X-ray absorptiometry
- MeSH
- humans, creatine, hematologic tests, exercise, double-blind method, body composition, physical endurance, weight lifting, physical fitness, dietary supplements, adult, male
8 autores
- Richard B. Kreider🇺🇸University of Memphis
- Maria Pontes Ferreira
- MICHAEL WILSON
- Pamela Grindstaff
- Steven Scott Plisk
- Jeff Reinardy
- Edward C. Cantler
- Anthony L. Almada
Resumen
El texto original del estudio, en el idioma en que se publicó.
Purpose
To determine the effects of 28 d of creatine supplementation during training on body composition, strength, sprint performance, and hematological profiles.
Methods
In a double-blind and randomized manner, 25 NCAA division IA football players were matched-paired and assigned to supplement their diet for 28 d during resistance/agility training (8 h x wk[-1]) with a Phosphagen HP (Experimental and Applied Sciences, Golden, CO) placebo (P) containing 99 g x d(-1) of glucose, 3 g x d(-1) of taurine, 1.1 g x d(-1) of disodium phosphate, and 1.2 g x d(-1) of potassium phosphate (P) or Phosphagen HP containing the P with 15.75 g x d(-1) of HPCE pure creatine monohydrate (HP). Before and after supplementation, fasting blood samples were obtained; total body weight, total body water, and body composition were determined; subjects performed a maximal repetition test on the isotonic bench press, squat, and power clean; and subjects performed a cycle ergometer sprint test (12 x 6-s sprints with 30-s rest recovery).
Results
Hematological parameters remained within normal clinical limits for active individuals with no side effects reported. Total body weight significantly increased (P < 0.05) in the HP group (P 0.85 +/- 2.2; HP 2.42 +/- 1.4 kg) while no differences were observed in the percentage of total body water. DEXA scanned body mass (P 0.77 +/- 1.8; HP 2.22 +/- 1.5 kg) and fat/bone-free mass (P 1.33 +/- 1.1; HP 2.43 +/- 1.4 kg) were significantly increased in the HP group. Gains in bench press lifting volume (P -5 +/- 134; HP 225 +/- 246 kg), the sum of bench press, squat, and power clean lifting volume (P 1,105 +/- 429; HP 1,558 +/- 645 kg), and total work performed during the first five 6-s sprints was significantly greater in the HP group.
Conclusion
The addition of creatine to the glucose/taurine/electrolyte supplement promoted greater gains in fat/bone-free mass, isotonic lifting volume, and sprint performance during intense resistance/agility training.
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