Creatine-dextrose and protein-dextrose induce similar strength gains during training
Tarnopolsky MA, Parise G, Yardley NJ, Ballantyne CS, Olatinji S, Phillips SM
Medicine and science in sports and exercise · 39 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
- 2001-12-01 · Med Sci Sports Exerc · vol. 33 · número 12 · págs. 2044–2052
- Editorial
- Lippincott Williams & Wilkins
- Citado
- 71 citas · más que el 85% de estudios similares · 2.0× el promedio de su campo
- Referencias
- 40 trabajos
- Acceso
- De pago
- Áreas de investigación
- Muscle metabolism and nutrition · Sports Performance and Training · Biochemical effects in animals
- Palabras clave
- creatine monohydrate, protein supplementation, casein, glucose, post-exercise nutrition, resistance training, strength gain, fat-free mass, muscle fiber area, isokinetic knee extension, one-repetition maximum, untrained men, weight training, muscle hypertrophy, protein turnover, carbohydrate supplementation
- MeSH
- muscle, skeletal, humans, body weight, creatine, creatinine, aspartate aminotransferases, creatine kinase, glucose, dietary proteins, blood urea nitrogen, anthropometry, exercise, double-blind method, physical education and training, adult, male, muscle fibers, skeletal
6 autores
- Mark Andrew Tarnopolsky🇨🇦McMaster University Medical Centre; McMaster University
- Gianni Parise🇨🇦McMaster University
- Nicholas J. Yardley🇨🇦McMaster University
- Craig S. Ballantyne🇨🇦McMaster University
- Sonny Olatunji🇨🇦McMaster University
- Stuart M. Phillips🇨🇦McMaster University
Resumen
El texto original del estudio, en el idioma en que se publicó.
Background
Creatine supplementation during resistance exercise training has been reported to induce greater increases in fat-free mass (FFM), muscle fiber area, and strength when compared with a placebo. We have recently shown that timing of nutrient delivery in the postexercise period can have positive effects on whole body protein turnover (B. D. Roy et al., Med Sci Sports Exerc. 32(8):1412-1418, 2000).
Purpose
We tested the hypothesis that a postexercise protein-carbohydrate supplement would result in similar increases in FFM, muscle fiber area, and strength as compared with creatine monohydrate (CM), during a supervised 2-month resistance exercise training program in untrained men.
Methods
Young healthy male subjects were randomized to receive either CM and glucose (N = 11; CM 10 g + glucose 75 g [CR-CHO] (CELL-Tech)) or protein and glucose (N = 8; casein 10 g + glucose 75 g [PRO+CHO]), using double-blinded allocation. Participants performed 8 wk of whole body split-routine straight set weight training, 1 h.d(-1), 6 d.wk(-1). Measurements, pre- and post-training were made of fat-free mass (FFM; DEXA), total body mass, muscle fiber area, isokinetic knee extension strength (45 and 240 degrees.s(-1)), and 1 repetition maximal (1RM) strength for 16 weight training exercises.
Results
Total body mass increased more for CR-CHO (+4.3 kg, 5.4%) as compared with PRO-CHO (+1.9 kg, 2.4%) (P < 0.05 for interaction) and FFM increased after training (P < 0.01) but was not significantly different between the groups (CR-CHO = +4.0 kg, 6.4%; PRO-CHO = +2.6 kg, 4.1%) (P = 0.11 for interaction). Muscle fiber area increased similarly after training for both groups (approximately 20%; P < 0.05). Training resulted in an increase in 1RM for each of the 16 activities (range = 14.2-39.9%) (P < 0.001), isokinetic knee extension torque (P < 0.01), with no treatment effects upon any of the variables.
Conclusions
We concluded that postexercise supplementation with PRO-CHO resulted in similar increases in strength after a resistance exercise training program as compared with CR-CHO. However, the greater gains in total mass for the CR-CHO group may have implications for sport-specific performance.
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