Effects of oral creatine supplementation on muscular strength and body composition
Becque MD, Lochmann JD, Melrose DR
Medicine and science in sports and exercise · 90 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
- 2000-03-01 · Med Sci Sports Exerc · vol. 32 · número 3 · págs. 654–658
- Editorial
- Lippincott Williams & Wilkins
- Citado
- 168 citas · más que el 93% de estudios similares · 3.6× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 29 trabajos
- Acceso
- De pago
- Áreas de investigación
- Muscle metabolism and nutrition · Sports Performance and Training · Biochemical effects in animals
- Palabras clave
- creatine monohydrate, muscle strength, upper arm muscle area, body composition, fat-free mass, resistance training, training periodization, one-repetition maximum, weight gain, fat mass, body fat percentage, training load progression, exercise frequency, exercise intensity, training duration
- MeSH
- humans, creatine, treatment outcome, double-blind method, task performance and analysis, body composition, weight-bearing, weight lifting, dietary supplements, adult, male
3 autores
- M. Daniel Becque🇺🇸Southern Illinois University Carbondale
- JOHN D. LOCHMANN🇺🇸Southern Illinois University Carbondale
- DONALD R. MELROSE🇺🇸Southern Illinois University Carbondale
Resumen
El texto original del estudio, en el idioma en que se publicó.
Purpose
The purpose of this investigation was to examine the effects of 6 wk of oral creatine supplementation during a periodized program of arm flexor strength training on arm flexor IRM, upper arm muscle area, and body composition.
Methods
Twenty-three male volunteers with at least 1 yr of weight training experience were assigned in a double blind fashion to two groups (Cr, N = 10; Placebo, N = 13) with no significant mean pretest one repetition maximum (IRM) differences in arm flexor strength. Cr ingested 5 g of creatine monohydrate in a flavored, sucrose drink four times per day for 5 d. After 5 d, supplementation was reduced to 2 g x d(-1). Placebo ingested a flavored, sucrose drink. Both drinks were 500 mL and made with 32 g of sucrose. IRM strength of the arm flexors, body composition, and anthropometric upper arm muscle area (UAMA) were measured before and after a 6-wk resistance training program. Subjects trained twice per week with training loads that began at 6RM and progressed to 2RM.
Results
IRM for Cr increased (P < 0.01) from (mean +/- SD) 42.8 +/- 17.7 kg to 54.7 +/- 14.1 kg, while IRM for Placebo increased (P < 0.01) from 42.5 +/- 15.9 kg to 49.3 +/- 15.7 kg. At post-test IRM was significantly (P < 0.01) greater for Cr than for Placebo. Body mass for Cr increased (P < 0.01) from 86.7 +/- 14.7 kg to 88.7 +/- 13.8 kg. Fat-free mass for Cr increased (P < 0.01) from 71.2 +/- 10.0 kg to 72.8 +/- 10.1 kg. No changes in body mass or fat-free mass were found for Placebo. There were no changes in fat mass and percent body fat for either group. UAMA increased (P < 0.01) 7.9 cm2 for Cr and did not change for Placebo.
Conclusion
Creatine supplementation during arm flexor strength training lead to greater increases in arm flexor muscular strength, upper arm muscle area, and fat-free mass than strength training alone.
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