Short-Term Creatine Supplementation and Repeated Sprint Ability-A Systematic Review and Meta-Analysis
Glaister M, Rhodes L
International journal of sport nutrition and exercise metabolism · 8 citas
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Cómo se estudió
- Diseño
- Metaanálisis (indexado por PubMed)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
Quién lo pagó
- Financiación
- Financiación no declarada
Publicación
- Publicado
- 2022-08-30 · Int J Sport Nutr Exerc Metab · vol. 32 · número 6 · págs. 491–500
- Editorial
- Human Kinetics
- Citado
- 11 citas · más que el 28% de estudios similares · 0.2× el promedio de su campo
- Referencias
- 52 trabajos
- Acceso
- De pago
- Áreas de investigación
- Muscle metabolism and nutrition · Sports Performance and Training · Biochemical effects in animals
- Palabras clave
- creatine supplementation, repeated sprint ability, short-term supplementation, peak power, average output power, fatigue, blood lactate, body mass, exercise performance
- MeSH
- humans, fatigue, creatine, lactic acid, exercise test, double-blind method, dietary supplements, adolescent, adult, middle aged, randomized controlled trials as topic, young adult
2 autores
- Mark Glaister🇬🇧St Mary's University Twickenham London
- Lauren Rhodes🇬🇧St Mary's University Twickenham London
Resumen
El texto original del estudio, en el idioma en que se publicó.
The aim of this study was to conduct a systematic review and meta-analysis of the effects of short-term creatine supplementation on repeated sprint ability. Fourteen studies met the inclusion criteria of adopting double-blind randomized placebo-controlled designs in which participants (age: 18-60 years) completed a repeated sprint test (number of sprints: 4 < n ≤ 20; sprint duration: ≤10 s; recovery duration: ≤90 s) before and after supplementing with creatine or placebo for 3-7 days in a dose of ∼20 g/day. No exclusion restrictions were placed on the mode of exercise. Meta-analyses were completed using random-effects models, with effects on measures of peak power output, mean power output, and fatigue (performance decline) during each repeated sprint test presented as standardized mean difference (δ), and with effects on body mass and posttest blood lactate concentration presented as raw mean difference (D). Relative to placebo, creatine resulted in a significant increase in body mass (D = 0.79 kg; p < .00001) and mean power output (δ = 0.61; p = .002). However, there was no effect of creatine on measures of peak power (δ = 0.41; p = .10), fatigue (δ = 0.08; p = .61), or posttest blood lactate concentration (D = 0.22 L/min; p = .60). In conclusion, creatine supplementation may increase mean power output during repeated sprint tests, although the absence of corresponding effects on peak power and fatigue means that more research, with measurements of intramuscular creatine content, is necessary to confirm.
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