Coffee Ingestion Improves 5 km Cycling Performance in Men and Women by a Similar Magnitude

Neil D. Clarke*, Nicholas A. Kirwan, Darren L. Richardson

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    18 Citations (SciVal)

    Abstract

    Caffeine is a well-established ergogenic aid, although research to date has predominantly focused on anhydrous caffeine, and in men. The primary aim of the present study was to investigate the effect of coffee ingestion on 5 km cycling time trial performance, and to establish whether sex differences exist. A total of 38 participants (19 men and 19 women) completed a 5 km time trial following the ingestion of 0.09 g·kg -1 coffee providing 3 mg·kg -1 of caffeine (COF), a placebo (PLA), in 300 mL of water, or control (CON). Coffee ingestion significantly increased salivary caffeine levels (p < 0.001; η 2 = 0.75) and, overall, resulted in improved 5 km time trial performance (p < 0.001; P η 2 = 0.23). Performance following COF (482 ± 51 s) was faster than PLA (491 ± 53 s; p = 0.002; P d = 0.17) and CON (487 ± 52 s; p =0.002; d = 0.10) trials, with men and women both improving by approximately 9 seconds and 6 seconds following coffee ingestion compared with placebo and control, respectively. However, no differences were observed between CON and PLA (p = 0.321; d = 0.08). In conclusion, ingesting coffee providing 3 mg·kg -1 of caffeine increased salivary caffeine levels and improved 5 km cycling time trial performance in men and women by a similar magnitude.
    Original languageEnglish
    Article number2575
    JournalNutrients
    Volume11
    Issue number11
    DOIs
    Publication statusPublished (VoR) - 25 Oct 2019

    Funding

    Funding: This research was funded by The Institute for Scientific Information on Coffee.

    FundersFunder number
    Institute for Scientific Information on Coffee

      Keywords

      • Afferent responses
      • Caffeine
      • Ergogenic aid
      • Sex differences
      • Time trial

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