Creatine supplementation alters the response to a graded cycle ergometer test
Nelson AG, Day R, Glickman-Weiss EL, Hegsted M, Kokkonen J, Sampson B
European journal of applied physiology · 21 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
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- Financiación no declarada
Publicación
- Publicado
- 2000-09-15 · Eur J Appl Physiol · vol. 83 · número 1 · págs. 89–94
- Editorial
- Springer Science+Business Media
- Citado
- 49 citas · más que el 69% de estudios similares · 0.7× el promedio de su campo
- Referencias
- 0 trabajos
- Acceso
- De pago
- Áreas de investigación
- Muscle metabolism and nutrition · Cardiovascular and exercise physiology · Sports Performance and Training
- Palabras clave
- creatine supplementation, creatine monohydrate, incremental exercise test, cycle ergometer, oxygen consumption, ventilatory threshold, heart rate, peak oxygen uptake, exercise metabolism, endurance
- MeSH
- humans, creatine, exercise test, exercise, oxygen consumption, heart rate, respiration, adult, female, male
6 autores
- Arnold G. Nelson🇺🇸Louisiana State University
- Randy Day🇺🇸Brigham Young University–Hawaii
- Ellen L. Glickman-Weiss🇺🇸Kent State University
- Maren Hegsted🇺🇸Louisiana State University
- Joke J. Kokkonen🇺🇸Brigham Young University–Hawaii
- B. Sampson🇺🇸Brigham Young University–Hawaii
Resumen
El texto original del estudio, en el idioma en que se publicó.
To determine the effects of creatine supplementation on cardiorespiratory responses during a graded exercise test (GXT) 36 trained adults (20 male, 16 female; 21-27 years old) performed two maximal GXTs on a cycle ergometer. The first GXT was done in a nonsupplemented condition, and the second GXT was done following 7 days of ingesting either 5 g creatine monohydrate, encased in gelatin capsules, four times daily (CS, 13 male, 6 female), or the same number of glucose capsules (PL, 7 male, 10 female). CS significantly (P0.05) on total test time [pre-PL= 1037 (181) s. versus post-PL= 1047 (172) s]. In addition, both oxygen consumption (VO2) and heart rate at the end of each of the first five GXT stages were significantly lower after CS, but were unchanged after PL. Moreover, the ventilatory threshold occurred at a significantly greater VO2 for CS [pre-CS = 2.2 (0.4) l x min(-1) or 66% of peak VO2 versus post-CS = 2.6 (0.5) l x min(-1) or 78% of peak Vo2; pre-PL = 2.6 (0.9) l x min(-1) or 70% peak VO2 versus post-PL = 2.6 (1.1) l x min(-1) or 68% of peak Vo2]. Neither CS nor PL had an effect on peak Vo2 [pre-CS = 3.4 (0.7) l x min(-1) versus post-CS = 3.3 (0.7) l x min(-1); pre-PL = 3.7 (1.1) l x min(-1) versus post-PL = 3.7 (1.1) l x min(-1)]. Apparently, CS can alter the contributions of the different metabolic systems during the initial stages of a GXT. Thus, the body is able to perform the sub-maximal workloads at a lower oxygen cost with a concomitant reduction in the work performed by the cardiovascular system.
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