Financiado en parte por 2Before Nutrition Ltd
Individual and Additive Effects of Acute Intake of New Zealand Blackcurrant Powder and Caffeine on High-Intensity Intermittent Running Performance
Nanavati K, Vitzel KF, Rutherfurd-Markwick K, Hurst R, Ali A
Nutrients · 0 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
- Financiado por la industria
- Empresa
- 2Before Nutrition Ltd
- Autores
- Al menos un autor declara un vínculo económico con la industria
Según 1 financiador declarado y la declaración de financiación del texto completo.
Publicación
- Publicado
- 2026-09-19 · Nutrients · vol. 18 · número 18 · pág. 3063
- Editorial
- Multidisciplinary Digital Publishing Institute
- Citado
- 0 citas · más que el 76% de estudios similares · 0.0× el promedio de su campo
- Referencias
- 41 trabajos
- Acceso
- Acceso abierto (revista) · CC-BY
- Áreas de investigación
- Coffee research and impacts · Sports Performance and Training · Exercise and Physiological Responses
- Palabras clave
- caffeine, acute supplementation, high-intensity intermittent running, repeated sprint performance, ergogenic aids, additive effects, blood lactate, free fatty acids, rating of perceived exertion, sprint speed, fatigue, Loughborough Intermittent Shuttle Test, recreational athletes, perceived arousal, subjective fatigue, perceived recovery
- MeSH
- humans, ribes, lactic acid, caffeine, fatty acids, nonesterified, plant extracts, powders, cross-over studies, double-blind method, running, adult, new zealand, male, athletic performance, young adult
5 autores
- Krutika Nanavati🇳🇿Eastern Institute of Technology; Massey University
- Kaio Fernando Vitzel🇳🇿Massey University
- Kay Janice Rutherfurd-Markwick🇳🇿Massey University
- Roger D. Hurst🇳🇿Bioeconomy Science Institute
- Ajmol Ali🇬🇧🇳🇿 · autor de correspondenciaLoughborough University; Massey University
Resumen
El texto original del estudio, en el idioma en que se publicó.
Background/objectives
Consumption of New Zealand blackcurrant extract for 7 days has shown to reduce slowing of sprint speed in recreationally active males. Acute caffeine consumption has shown to improve repeated-sprint performance in a fatigued state. Thus, combined intake of New Zealand blackcurrants and caffeine may provide an additive or a synergistic effect to improve repeated-sprint performance, especially in fatigued individuals. Our study investigated the individual and additive effect of acute intake of New Zealand blackcurrant powder and caffeine on high-intensity intermittent running performance.
Methods
Fourteen recreationally active males participated in a double-blind, randomised controlled crossover trial consisting of four experimental arms: placebo (PLA), New Zealand blackcurrant powder (NZBP), caffeine (CAFF), and NZBP + caffeine (NZBP + CAFF). Participants reported to the laboratory fasted and consumed a standardised breakfast with the study intervention 1 h before the exercise trial. Speed and distance covered for walking, sprinting, running, and jogging were assessed using the modified Loughborough Intermittent Shuttle Test (m-LIST). Blood lactate and free fatty acids (FFAs) levels, and perceptual measures (feeling scale, felt arousal scale and ratings of perceived exertion) were also assessed.
Results
Caffeine intake increased average sprint speed (p = 0.045, η2 = 0.345) and reduced sprint time (p = 0.030, η2 = 0.463) during the m-LIST protocol. Ratings of perceived exertion were lower with caffeine intake (p = 0.014, η2 = 0.381), while blood lactate concentration was higher (p = 0.001, η2 = 0.761). Serum free fatty acids concentrations increased over time (p 2 = 0.900), with a significant NZBP × time interaction (p = 0.005, η2 = 0.433). No significant effects of NZBP alone or caffeine × NZBP interactions were observed for sprint performance outcomes.
Conclusions
Acute NZBP did not improve repeated-sprint performance, either alone or when combined with caffeine. In contrast, caffeine-containing treatments were associated with improved sprint performance and lower perceived exertion. These findings suggest that caffeine, rather than NZBP, was responsible for the observed ergogenic responses, with no evidence of an additive benefit from acute combined supplementation.
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