Physiological responses to short-term exercise in the heat after creatine loading
Volek JS, Mazzetti SA, Farquhar WB, Barnes BR, Gómez AL, Kraemer WJ
Medicine and science in sports and exercise · 49 citas
Etiquetas de revisión
Financiación no declaradaDatos neutrales que nuestra revisión registró sobre cómo se hizo este estudio. Describen el método, nunca si nos gusta el resultado.
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
- 2001-07-01 · Med Sci Sports Exerc · vol. 33 · número 7 · págs. 1101–1108
- Editorial
- Lippincott Williams & Wilkins
- Citado
- 105 citas · más que el 95% de estudios similares · 5.0× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 33 trabajos
- Acceso
- De pago
- Áreas de investigación
- Thermoregulation and physiological responses · Muscle metabolism and nutrition · Cardiovascular and exercise physiology
- Palabras clave
- creatine supplementation, heat acclimation, cardiovascular response, renal response, thermoregulation, fluid regulation, cortisol, aldosterone, renin-angiotensin system, atrial peptides, vasopressin, repeated sprint performance, peak power, weight gain
- MeSH
- body water, urine, humans, potassium, creatine, creatinine, aldosterone, hormones, body mass index, exercise, body temperature regulation, sweating, natriuresis, plasma volume, blood pressure, heart rate, adult, male, physical exertion, hot temperature
6 autores
- Jeff S. Volek🇺🇸Ball State University
- SCOTT A. MAZZETTI🇺🇸Ball State University
- William B. Farquhar🇺🇸Ball State University
- Brian R. Barnes🇺🇸Ball State University
- A L. G mez🇺🇸Ball State University
- William J. Kraemer🇺🇸Ball State University
Resumen
El texto original del estudio, en el idioma en que se publicó.
Purpose
This investigation was designed to examine the influence of creatine (Cr) supplementation on acute cardiovascular, renal, temperature, and fluid-regulatory hormonal responses to exercise for 35 min in the heat.
Methods
Twenty healthy men were matched and then randomly assigned to consume 0.3 g.kg(-1) Cr monohydrate (N = 10) or placebo (N = 10) for 7 d in a double-blind fashion. Before and after supplementation, both groups cycled for 30 min at 60-70% VO2(peak) immediately followed by three 10-s sprints in an environmental chamber at 37 degrees C and 80% relative humidity.
Results
Body mass was significantly increased (0.75 kg) in Cr subjects. Heart rate, blood pressure, and sweat rate responses to exercise were not significantly different between groups. There were no differences in rectal temperature responses in either group. Sodium, potassium, and creatinine excretion rates obtained from 24-h and exercise urine collection periods were not significantly altered in either group. Serum creatinine was elevated in the Cr group but within normal ranges. There were significant exercise-induced increases in cortisol, aldosterone, renin, angiotensin I and II, atrial peptide, and arginine vasopressin. The aldosterone response was slightly greater in the Cr (263%) compared with placebo (224%) group. Peak power was greater in the Cr group during all three 10-s sprints after supplementation and unchanged in the placebo group. There were no reports of adverse symptoms, including muscle cramping during supplementation or exercise.
Conclusion
Cr supplementation augments repeated sprint cycle performance in the heat without altering thermoregulatory responses.
Resumen vía Europe PMC. Los derechos de autor siguen siendo de los autores o la editorial.
Confianza de la comunidad
Cargando…
¿Cuánto confías en los hallazgos de este estudio?
Comentarios
¿Algo está mal aquí?
Señala este estudio si su información, etiquetas o financiación parecen incorrectas. Un editor revisa cada señalamiento.
Información educativa sobre investigación publicada. No es consejo médico ni una recomendación para empezar o dejar nada.