Caffeine increases strength and power performance in resistance-trained females during early follicular phase
Norum M, Risvang LC, Bjørnsen T, Dimitriou L, Rønning PO, Bjørgen M, Raastad T
Scandinavian journal of medicine & science in sports · 31 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
- 2020-07-18 · Scand J Med Sci Sports · vol. 30 · número 11 · págs. 2116–2129
- Editorial
- Wiley
- Citado
- 43 citas · más que el 89% de estudios similares · 2.4× el promedio de su campo
- Referencias
- 48 trabajos
- Acceso
- Acceso abierto (revista híbrida) · CC-BY
- Áreas de investigación
- Coffee research and impacts · Sports Performance and Training · Muscle metabolism and nutrition
- Palabras clave
- caffeine, ergogenic aids, early follicular phase, menstrual cycle, one-repetition maximum, muscular endurance, squatting, bench press, countermovement jump, rate of force development, muscle activation, caffeine metabolites, caffeine side effects
- MeSH
- knee, humans, caffeine, cross-over studies, double-blind method, perception, follicular phase, isometric contraction, weight lifting, beverages, adult, female, muscle strength, physical exertion, resistance training, performance-enhancing substances, plyometric exercise, myalgia
7 autores
- Martin Norum🇬🇧Middlesex University London
- Linn Christin Risvang🇳🇴🇬🇧 · autor de correspondenciaOsloMet – Oslo Metropolitan University; Middlesex University London
- Thomas Bjørnsen🇳🇴University of Agder
- Lygeri Dimitriou🇬🇧Middlesex University London
- Per Ola Rønning🇳🇴OsloMet – Oslo Metropolitan University
- Morten Bjørgen🇳🇴OsloMet – Oslo Metropolitan University
- Truls Raastad🇳🇴Norwegian School of Sport Sciences
Resumen
El texto original del estudio, en el idioma en que se publicó.
The effects of 4 mg·kg-1 caffeine ingestion on strength and power were investigated for the first time, in resistance-trained females during the early follicular phase utilizing a randomized, double-blind, placebo-controlled, crossover design. Fifteen females (29.8 ± 4.0 years, 63.8 ± 5.5 kg [mean ± SD]) ingested caffeine or placebo 60 minutes before completing a test battery separated by 72 hours. One-repetition maximum (1RM), repetitions to failure (RTF) at 60% of 1RM, was assessed in the squat and bench press. Maximal voluntary contraction torque (MVC) and rate of force development (RFD) were measured during isometric knee extensions, while utilizing interpolated twitch technique to measure voluntary muscle activation. Maximal power and jump height were assessed during countermovement jumps (CMJ). Caffeine metabolites were measured in plasma. Adverse effects were registered after each trial. Caffeine significantly improved squat (4.5 ± 1.9%, effect size [ES]: 0.25) and bench press 1RM (3.3 ± 1.4%, ES: 0.20), and squat (15.9 ± 17.9%, ES: 0.31) and bench press RTF (9.8 ± 13.6%, ES: 0.31), compared to placebo. MVC torque (4.6 ± 7.3%, ES: 0.26), CMJ height (7.6 ± 4.0%, ES: 0.50), and power (3.8 ± 2.2%, ES: 0.24) were also significantly increased with caffeine. There were no differences in RFD or muscle activation. Plasma [caffeine] was significantly increased throughout the protocol, and mild side effects of caffeine were experienced by only 3 participants. This study demonstrated that 4 mg·kg-1 caffeine ingestion enhanced maximal strength, power, and muscular endurance in resistance-trained and caffeine-habituated females during the early follicular phase, with few adverse effects. Female strength and power athletes may consider using this dose pre-competition and -training as an effective ergogenic aid.
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