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Caffeine and endurance performance.

S K Powers, S Dodd

    Sports Medicine (Auckland, N.Z.)
    |May 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    Caffeine may enhance athletic performance, particularly in endurance events, by increasing fatty acid availability for muscle metabolism. However, scientific consensus on its ergogenic effects remains divided, especially for strength-based activities.

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    Area of Science:

    • Sports Science
    • Exercise Physiology
    • Nutritional Biochemistry

    Background:

    • Caffeine is widely believed by athletes to be an ergogenic aid, leading to its regulation by sports governing bodies.
    • Cellular mechanisms of caffeine include calcium translocation, increased cyclic AMP, and adenosine receptor blockade.
    • Systemic effects involve central nervous system arousal, metabolite mobilization, and potential enhancement of muscle contractility.

    Purpose of the Study:

    • To evaluate the ergogenic effects of caffeine on athletic performance.
    • To explore the scientific community's divided stance on caffeine's performance-enhancing capabilities.
    • To investigate potential mechanisms, such as fatty acid mobilization and glycogen sparing, in endurance events.

    Main Methods:

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  • Review of existing scientific literature and studies on caffeine's impact on athletic performance.
  • Analysis of cellular and systemic physiological responses to caffeine ingestion.
  • Examination of evidence related to strength, power, VO2max, incremental exercise, and endurance events.

    • Main Results:

    • Evidence for caffeine improving strength and power performance is inconclusive due to limited in vivo human research.
    • Reports on caffeine's effects on VO2max and incremental exercise performance are conflicting.
    • Recent studies suggest caffeine may offer ergogenic benefits for endurance activities like marathon running.

    Conclusions:

    • The ergogenic potential of caffeine in sports performance is still debated within the scientific community.
    • Caffeine's proposed mechanism for endurance enhancement involves increased free fatty acid availability, leading to glycogen sparing.
    • Further in vivo human research is needed to establish definitive conclusions regarding caffeine's ergogenic effects across different types of athletic events.