Research paper
Habitual Caffeine Consumption Does Not Affect the Ergogenicity of Coffee Ingestion During a 5 km Cycling Time Trial.
Study answer
What this study found
Coffee ingestion improved 5-km cycling time-trial completion by 8 ± 12 s vs placebo (p<0.001). Low habitual caffeine users improved by 9 ± 14 s; high users by 8 ± 10 s; no significant difference between groups (p=0.946). No sex or order effects; both men and women improved by about 8–9 s. Habitual caffeine intake did not influence the ergogenic effect of caffeinated coffee for this task. Consuming caffeinated coffee (~3 mg/kg caffeine) 60 minutes before exercise enhances 5-km cycling performance in recreational athletes, regardless of habitual caffeine use; coffee is a practical pre-exercise…
- Study & population
- Double-blind, randomized, crossover, placebo-controlled design; 46 recreationally active participants (27 men, 19 women) who trained ~2±1 times per week for at least 1 year.
- Intervention
- 0.09 g/kg coffee providing 3 mg/kg caffeine vs placebo; beverage consumed as a 300 mL beverage within ~10 minutes; 60 minutes before a 5-km cycling time trial.
- Key limitation
- Limitations include reliance on self-reported habitual caffeine intake, potential misclassification, variability in caffeine content across coffee sources, incomplete adherence to 12-hour caffeine abstinence before trials, use of a 24-hour dietary record for standardization, and limited generalizability beyond…
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Open PDFOriginal abstract
There is growing evidence that caffeine and coffee ingestion prior to exercise provide similar ergogenic benefits. However, there has been a long-standing paradigm that habitual caffeine intake may influence the ergogenicity of caffeine supplementati…