meta_analysis
    2005
    High Quality

    Effects of caffeine ingestion on rating of perceived exertion during and after exercise: a meta-analysis

    Doherty M, Smith PM

    Published in Scandinavian Journal of Medicine & Science in Sports

    Methodology

    Meta-analysis of 21 studies with 109 effect sizes on caffeine and ratings of perceived exertion

    Key Findings

    Caffeine reduced RPE during exercise by 5.6% and improved exercise performance by 11.2%; RPE change explained about 29% of the performance improvement

    Conclusions

    Lower perceived effort is a plausible mechanism by which caffeine makes training feel more sustainable

    Limitations

    Older literature base; acute laboratory settings

    Outcomes Measured

    Exercise Motivation
    Primary

    In comparison to placebo, caffeine reduced RPE during exercise by 5.6% (95% CI (confidence interval), -4.5% to -6.7%)

    Study Details

    Year:2005
    Quality Score:8/10

    Access Study

    View on PubMedOriginal Source

    This information is for educational purposes only. Always consult a healthcare professional before starting any supplement regimen.