Caffeine improved cycling trial performance in mentally fatigued cyclists, regardless of alterations in prefrontal cortex activation
Franco-Alvarenga PE, Brietzke C, Canestri R, Goethel MF, Hettinga F, Santos TM, Pires FO
Physiology & behavior · 64 citations
How it was studied
- Design
- Randomized controlled trial (indexed by PubMed)
- Studied in
- People
- Main outcome
- Health markers and function
Who paid for it
- Funding
- Independent funding
- Government
- Fundação de Amparo à Pesquisa do Estado de São Paulo
- Government
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Government
- São Paulo Research Foundation
- Government
- National Council for Scientific and Technological Development
- Grants
- Conselho Nacional de Desenvolvimento Científico e Tecnológico (#307072/2016-9); Fundação de Amparo à Pesquisa do Estado de São Paulo (#2016/164963)
Based on 4 listed funder(s).
Publication
- Published
- 2019-02-10 · Physiol Behav · vol. 204 · pp. 41–48
- Publisher
- Elsevier BV
- Cited
- 93 citations · more than 98% of similar papers · 7.5× the field average
- Impact
- Top 10% most cited in its field
- References
- 47 works
- Access
- Open access (hybrid journal) · CC-BY-NC-ND
- Research areas
- Coffee research and impacts · Behavioral Health and Interventions · Obesity, Physical Activity, Diet
- Keywords
- Psychology, Prefrontal cortex, Ingestion, Placebo, Cycling, Arousal, Audiology, Cognition, Medicine, Psychiatry, Internal medicine, Neuroscience
- MeSH
- prefrontal cortex, humans, caffeine, central nervous system stimulants, electroencephalography, theta rhythm, double-blind method, mental fatigue, motivation, cognition, arousal, physical endurance, bicycling, adult, male, athletic performance
7 authors
From BR, GB
- Paulo Estevão Franco‐AlvarengaUniversidade de São Paulo
- Cayque BrietzkeUniversidade de São Paulo
- Raul CanestriUniversidade de São Paulo
- Márcio Fagundes GoethelUniversidade de São Paulo
- Florentina Johanna HettingaNorthumbria University
- Tony Meireles SantosUniversidade Federal de Pernambuco
Abstract
Purpose
To verify whether caffeine (CAF) could increase the prefrontal cortex (PFC) activation and improve 20 km cycling time trial (TT20km) performance in mentally fatigued cyclists.
Methods
After preliminary TT20km, twelve recreational cyclists (VO2MAX of 58.9 ± 6.2 mL kg min-1) performed a familiarization with a cognitive test to induce mental fatigue (MF) and psychological scales. Thereafter, they performed: 2) a baseline TT20km; 3) a mentally fatigued TT20km (MF); 4 and 5) a mentally fatigued TT20km after CAF (MF + CAF) or placebo (MF + PLA) ingestion, in a double-blind, counterbalanced design. Performance and psychological responses were obtained throughout the TT20km, while PFC electroencephalography (EEG) theta wave was obtained before and after the mental fatigue test.
Results
The mental fatigue-induced increase in EEG theta wave (↑ ~ 4.8%) was reverted with CAF (↓ 8.8%) and PLA ingestion (↓ 4.8%). CAF improved TT20km performance in mentally fatigued cyclists by reducing time (p = .00; ↓ ~ 1.7%) and increasing WMEAN (p = .00; ↑ ~ 3.6%), when compared to MF + PLA. The RPE-power output ratio was lower (p = .01), but affect (p = .018), motivation (p = .033) and emotional arousal (p = .001) were greater throughout the TT20km in MF + CAF than in MF + PLA.
Conclusions
CAF ingestion improved TT20km performance and psychological responses in mentally fatigued cyclists, despite the unaltered PFC activation.
Abstract via Europe PMC. Copyright remains with the authors or publisher.
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